3e451 Volume 1 Fuel And Electrical Fundamentals

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1. (005) What should you do first if you get soaked with fuel?

Explanation

If you get soaked with fuel, the first thing you should do is find the nearest emergency shower. This is important because fuel is flammable and can pose a safety risk. Drenching yourself with your clothes on is recommended to prevent the fuel from further spreading on your body. Removing your clothes before drenching yourself may cause the fuel to come into contact with your skin, increasing the risk of absorption. Returning to the shop or going home before taking a shower can delay the immediate action needed to minimize the potential hazards of fuel exposure.

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About This Quiz
Air Force Quizzes & Trivia

This quiz on '3E451 Volume 1 Fuel and Electrical Fundamentals' assesses knowledge on fuel properties, safety measures, and handling protocols within the Air Force. It covers critical points like boiling, flash points, and safe practices, essential for operational safety and efficiency.

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2. (014) What is performed after a contractor has completed work?

Explanation

After a contractor has completed work, an acceptance inspection is performed. This inspection is conducted to ensure that the work meets the required standards and specifications. It involves a thorough examination of the completed work to check for any defects, errors, or deviations from the agreed-upon plans. The purpose of the acceptance inspection is to determine whether the contractor has fulfilled their obligations and if the work is acceptable for final approval and payment.

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3. (016) Which one of the following is not considered a hazardous substance?

Explanation

Stagnant ditch water is not considered a hazardous substance because it does not contain any toxic or harmful chemicals. While oily rags, used fuel filters, and lead paint chips can all pose health and environmental risks due to their potential for igniting, releasing pollutants, or containing lead, stagnant ditch water does not have these same hazards.

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4. (024) Which shell of the valance electrons determines whether a material is a good or poor conductor of electricity?

Explanation

The outermost shell of valence electrons determines whether a material is a good or poor conductor of electricity. This is because the outermost shell is responsible for the bonding and interaction of atoms in a material. If the outermost shell is filled or close to being filled, the material is more likely to be a poor conductor of electricity, as the electrons are tightly held and not easily free to move and carry electric charge. On the other hand, if the outermost shell is not filled, the material is more likely to be a good conductor of electricity, as the electrons are more loosely held and can move freely to conduct electric current.

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5. (017) When disposing of waste water from a fuel tank bottom where do you put it?

Explanation

When disposing of waste water from a fuel tank bottom, it is recommended to put it in an oil/water separator. An oil/water separator is a device that separates oil and other contaminants from water, allowing the water to be safely discharged into the environment. This is important because fuel tank bottoms contain oil and other pollutants that can be harmful to the environment if not properly separated and treated. Using an oil/water separator ensures that the water is properly treated before being discharged.

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6. (040) When a circuit breaker is in an overload condition it will

Explanation

When a circuit breaker is in an overload condition, it will trip. This means that the circuit breaker will automatically open and interrupt the flow of electricity, preventing any further damage or overheating. Tripping is a safety mechanism designed to protect the circuit and the connected devices from excessive current. It helps to prevent fires, electrical shocks, and damage to the electrical system.

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7. (007) Who approves respirators worn by Air Force employees?

Explanation

Bioenvironmental engineers (BE) are responsible for ensuring the health and safety of Air Force employees. They are trained to assess and approve the use of respirators, which are crucial for protecting individuals from harmful airborne contaminants. BEs have the expertise and knowledge to evaluate the effectiveness and suitability of different respirator models for specific work environments. They play a critical role in ensuring that Air Force employees have the appropriate respiratory protection to safeguard their health while performing their duties.

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8. (004) After use fuel soaked rags should be placed in 

Explanation

After use, fuel soaked rags should be placed in self-closing metal containers. This is because fuel soaked rags can be highly flammable and pose a fire hazard. Self-closing metal containers are designed to prevent the escape of flammable vapors and contain any potential fire. Placing the rags in hazardous waste storage areas or solid-waste disposal pits may not provide adequate containment and could increase the risk of a fire. Containers filled with water may not be suitable as the water can evaporate, leaving the rags exposed to ignition sources.

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9. (006) With a second-degree burn, the skin is best described as

Explanation

A second-degree burn is characterized by damage to both the epidermis (outer layer of skin) and the dermis (second layer of skin). This type of burn typically presents with redness, pain, and the formation of blisters. Blistering occurs due to the separation of the damaged epidermis from the underlying dermis, resulting in the accumulation of fluid. Therefore, the correct answer is "Blistered."

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10. (001) What is the flash point of JP-8 jet fuel?

Explanation

The flash point of JP-8 jet fuel is 100 degrees F. The flash point refers to the minimum temperature at which a substance can ignite when exposed to an open flame or spark. In the case of JP-8 jet fuel, it will not ignite unless the temperature reaches or exceeds 100 degrees F. This information is crucial for handling and storing the fuel safely to prevent accidents or fires.

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11. (009) Where can you find most standard and some technical Air Force publications?

Explanation

Most standard and some technical Air Force publications can be found on the Air Force publishing website. This is a centralized platform where the Air Force publishes and distributes its official publications. It is easily accessible to Air Force personnel and provides a convenient way to access and download the necessary publications. The base library may have some publications, but the Air Force publishing website is the primary source for these materials. There is no mention of a pouch attached to the associated equipment or files maintained by the squadron historian, so these options can be ruled out.

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12. (008) What type of respirator will water and fuel system maintenance (WFM) personnel use for immediate danger to life and health (IDLH) conditions?

Explanation

WFM personnel will use a supplied-air respirator for immediate danger to life and health (IDLH) conditions. This type of respirator provides a continuous supply of clean air from a remote source, ensuring that the wearer is not exposed to any contaminants in the environment. It is the most effective option for protecting against hazardous substances in the air, such as those found in water and fuel systems. NBC gas masks, air purifiers, and dual filter air purifying masks with battery backup are not specifically designed for IDLH conditions and may not provide adequate protection.

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13. (040) What is the first step in replacing a fuse?

Explanation

The first step in replacing a fuse is to de-energize the switchbox. This is important to ensure safety and prevent any electrical accidents. By de-energizing the switchbox, you are cutting off the power supply to the fuse, reducing the risk of electric shock or damage to the electrical system. Once the switchbox is de-energized, you can safely proceed with replacing the fuse.

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14. (003) How many feet per second (fps) is considered normal flow through a pipeline?

Explanation

The correct answer is 7-12 psi. This range of pressure is considered normal flow through a pipeline. It indicates that the flow of fluid is at an appropriate level and the pipeline is functioning efficiently. Higher or lower pressure levels may indicate issues with the pipeline, such as blockages or leaks. Therefore, maintaining a pressure within the range of 7-12 psi is important for proper pipeline operation.

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15. (006) What should you do if a conscious coworker has swallowed JP-8?

Explanation

If a conscious coworker has swallowed JP-8, giving the person four or five glasses of water is the correct action to take. Water can help dilute the chemical and reduce its effects on the body. It is important to provide immediate assistance to the coworker by giving them water to drink. This can help minimize the potential harm caused by swallowing JP-8.

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16. (014) Who do you notify if you see contract workers performing work safely but incorrectly?

Explanation

If you see contract workers performing work safely but incorrectly, you should notify the contract monitor. The contract monitor is responsible for overseeing the performance of the contract workers and ensuring that they are following the correct procedures and standards. By notifying the contract monitor, they can take appropriate action to address the incorrect work and ensure that it is corrected. This helps to maintain safety and quality standards on the job site.

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17. (029) The most important safety precaution you should apply when using a multimeter is to

Explanation

When using a multimeter, it is crucial to never touch the metal probes of either test lead while the circuit is energized. This is because the probes are conducting electricity, and touching them can result in electric shock or injury. It is important to ensure that you are wearing appropriate protective gear and following safety guidelines to prevent accidents and ensure personal safety.

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18. (029) Ammeters are used to check for?

Explanation

Ammeters are used to check for the current draw or flow in an electrical circuit. They are designed to measure the amount of electric current passing through a particular point in a circuit. By connecting the ammeter in series with the circuit, it allows the user to accurately measure the current flowing through the circuit. This information is important in various electrical applications, as it helps in determining whether the circuit is functioning properly and whether there are any abnormalities in the current flow.

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19. (024) A material that allows a large number of free electrons to move through it is called 

Explanation

A conductor is a material that allows a large number of free electrons to move through it. This means that the electrons in the material are not tightly bound to their atoms and can easily flow and carry an electric current. Conductors typically have low resistance to the flow of electrons, making them ideal for conducting electricity.

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20. (001) What term describes the temperature at which a liquid actively starts to vaporize?

Explanation

The boiling point is the temperature at which a liquid starts to vaporize and turn into a gas. It is the point at which the vapor pressure of the liquid equals the atmospheric pressure, causing bubbles to form within the liquid. This process is known as boiling. The other options, flash point and fire point, refer to the temperature at which a liquid produces enough vapor to ignite in the presence of an open flame. Volatility, on the other hand, refers to a liquid's tendency to evaporate at normal temperatures.

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21. (029) What is the resistance of a circuit with an applied voltage of 120 volts and a current flow of 9 amperes?

Explanation

The resistance of a circuit can be calculated using Ohm's Law, which states that resistance is equal to voltage divided by current. In this case, the applied voltage is 120 volts and the current flow is 9 amperes. By dividing the voltage by the current, we get 120/9 = 13.33 Ohms. Therefore, the resistance of the circuit is 13.33 Ohms.

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22. (019) What does a direct drive pump generally use to absorb vibration?

Explanation

A direct drive pump generally uses a flexible coupling to absorb vibration. A flexible coupling is designed to connect two shafts while allowing for a small amount of misalignment and absorbing shocks and vibrations. It provides flexibility and helps to reduce stress on the pump and its components, resulting in smoother operation and increased longevity.

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23. (004) What single element of the fire triangle must we try to eliminate?

Explanation

In order to extinguish a fire, it is necessary to eliminate one of the three elements of the fire triangle: fuel, heat, or oxygen. While fuel and oxygen are necessary for a fire to occur, heat is the element that must be eliminated to extinguish the fire. Heat provides the energy needed for the fire to sustain and continue burning. By removing the heat source or cooling down the area, the fire will be deprived of the energy it needs to continue burning, effectively extinguishing it.

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24. (038) A motor that operates slowly may have a

Explanation

A motor that operates slowly may have a deficient voltage supply. When a motor does not receive enough voltage, it may not be able to generate enough power to operate at its normal speed. This can result in the motor operating slowly. Other factors such as ventilation problems, a bad conductor, or a blown fuse may also affect the motor's performance, but a deficient voltage supply is the most likely cause for a slow operation.

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25. (029) The easiest and simplest meter to use for measuring current flow in a circuit is?

Explanation

A clamp-on ammeter is the easiest and simplest meter to use for measuring current flow in a circuit because it can be easily clamped around a wire without the need for any physical connection to the circuit. This eliminates the need to break the circuit or insert the meter into the circuit, making it convenient and user-friendly. Additionally, the clamp-on ammeter provides accurate readings without requiring any additional circuitry or adjustments.

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26. (034) Devices used in a magnetic across-the-line motor controllers to prevent chatter contact are referred to as

Explanation

Shaded rings are devices used in a magnetic across-the-line motor controller to prevent chatter contact. Chatter contact refers to the rapid opening and closing of the contacts in the controller, which can cause arcing and damage to the contacts. Shaded rings are designed to create a magnetic field that dampens the movement of the contacts, reducing the likelihood of chatter and improving the overall performance and lifespan of the controller.

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27. (037) What type of motor enclosure is used in fuel systems?

Explanation

An explosion-proof motor enclosure is used in fuel systems to prevent any sparks or flames from igniting the fuel and causing an explosion. This type of enclosure is designed to contain any potential explosion within the motor, preventing it from spreading to the surrounding environment. It is specifically built to withstand and contain explosive gases or vapors, making it the safest option for motor enclosures in fuel systems.

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28. (012) Most Defense Energy Support Center (DESC) emergency projects involve an actual or threatening fuel spill and are of what nature?

Explanation

DESC emergency projects involve actual or threatening fuel spills, which are of an environmental nature. These projects are focused on addressing and mitigating the environmental impact caused by the fuel spills, such as containing and cleaning up the spilled fuel to prevent further contamination and damage to the environment.

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29. (015) In to how many titles is the Code of Federal Regulations (CFR) divided?

Explanation

The Code of Federal Regulations (CFR) is divided into 50 titles. Each title represents a specific subject area or agency within the federal government. These titles cover a wide range of topics, including agriculture, commerce, energy, transportation, and more. Each title is further divided into chapters, sections, and subsections, providing a comprehensive and organized compilation of federal regulations.

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30. (027) What are the two most common methods of producing voltage?

Explanation

The two most common methods of producing voltage are chemical and mechanical. Chemical methods involve the use of chemical reactions to generate an electric current, such as in batteries. Mechanical methods involve the use of mechanical energy, such as in generators, where a mechanical force is used to rotate a coil of wire within a magnetic field, inducing a voltage. Both chemical and mechanical methods are widely used in various applications to produce voltage and power electrical devices.

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31. (027) What type of current flow cannot be transformed from a higher voltage to a lower voltage?

Explanation

Direct current (DC) is the type of current flow that cannot be transformed from a higher voltage to a lower voltage. This is because DC flows in only one direction and does not change its polarity or magnitude over time. In contrast, alternating current (AC) can be easily transformed from a higher voltage to a lower voltage through the use of transformers, as AC periodically changes its direction and magnitude. Fluctuating current is not a specific type of current flow and does not provide any relevant information to answer the question.

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32. (002) What is the human response to fuel vapor exposure at 10,000 parts per million (ppm) for 10 minutes?

Explanation

Exposure to fuel vapor at 10,000 ppm for 10 minutes can lead to intoxication. This means that the person may experience symptoms such as dizziness, impaired coordination, confusion, and potentially loss of consciousness. Intoxication occurs when high levels of a substance, in this case, fuel vapor, enter the body and affect the central nervous system. This can be dangerous and may require immediate medical attention.

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33. (006) What should you do for a person suffering from heat cramps?

Explanation

For a person suffering from heat cramps, giving them large amounts of water is the correct action to take. Heat cramps are often caused by dehydration and electrolyte imbalances, so providing the person with water can help rehydrate their body and restore the balance of electrolytes.

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34. (037) What should be your first check on a motor that seems to be overheating?

Explanation

The first check on a motor that seems to be overheating should be ventilation. Poor ventilation can cause a motor to overheat as it prevents the dissipation of heat generated during operation. By ensuring that the motor has proper ventilation, such as checking for blocked air vents or ensuring that the motor is not enclosed in a tight space, the overheating issue can be resolved.

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35. (040) To which effect of current flow does a fuse react?

Explanation

A fuse reacts to the effect of current flow by detecting and responding to excessive heat. When the current passing through a circuit exceeds the fuse's rated capacity, the resistance in the fuse causes it to heat up. This excessive heat then melts a small piece of metal within the fuse, breaking the circuit and preventing further current flow. Therefore, the correct answer is heat.

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36. (025) The unified movement of electrons in a specific direction is called

Explanation

Electrical current refers to the flow of electric charge, specifically the movement of electrons in a specific direction. It is the result of the unified movement of electrons, which carry a negative charge, through a conductive medium. The movement of these electrons creates a flow of electric current, allowing the transfer of energy and the operation of electrical devices.

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37. (028) Which of the following best describes a schematic drawing?

Explanation

A schematic drawing, sometimes called a one-line diagram, is a visual representation of an electrical circuit. It is useful in troubleshooting because it shows the connections between components and helps in understanding the flow of electricity. However, it does not show internal connections and therefore may not be helpful in troubleshooting issues within individual components.

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38. (019) How many different classes of levers are there?

Explanation

There are three different classes of levers. Levers are simple machines that consist of a rigid bar or beam that is able to rotate around a fixed point called a fulcrum. The three classes of levers are determined by the relative positions of the fulcrum, the effort (force applied to the lever), and the load (the resistance being moved). In a first-class lever, the fulcrum is located between the effort and the load. In a second-class lever, the load is located between the fulcrum and the effort. In a third-class lever, the effort is located between the fulcrum and the load.

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39. (026) When do magnetic lines of force in a magnet cross?

Explanation

Magnetic lines of force never cross each other because they represent the direction of the magnetic field. The lines always form closed loops, flowing from the north pole to the south pole of a magnet. If the lines were to cross, it would indicate that the magnetic field has two different directions at the same point, which is not possible. Therefore, magnetic lines of force never cross each other.

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40. (033) A step-up transformer produces a secondary voltage that is

Explanation

A step-up transformer is designed to increase the voltage level from the primary side to the secondary side. This is achieved by having more turns in the secondary coil compared to the primary coil. As a result, the secondary voltage is higher than the primary voltage. Additionally, according to the transformer equation, the ratio of voltage to current remains constant. Since the secondary voltage is higher, the secondary current will be lower than the primary current to maintain this ratio. Therefore, the correct answer is "Higher than the primary voltage and a secondary current lower than the primary current."

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41. (036) What type of couplings do large motors usually use?

Explanation

Large motors usually use a combination of rigid and flexible couplings. Rigid couplings are used to provide a strong and solid connection between the motor and the driven equipment, ensuring efficient power transmission and precise alignment. On the other hand, flexible couplings are used to compensate for any misalignment between the motor and the driven equipment, absorb shocks and vibrations, and protect the motor from damage. The combination of both types of couplings allows for a balance between rigidity and flexibility, ensuring optimal performance and longevity of the motor.

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42. (018) When pressure is no longer applied to open an automatic valve, which of the following unbalanced forces closes it?

Explanation

When pressure is no longer applied to open an automatic valve, the unbalanced forces that close it are gravity and spring tension. Gravity pulls the valve downward, while the spring tension pulls the valve back to its closed position. These two forces work together to ensure that the valve closes securely when pressure is released.

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43. (025) According to Ohm's law, how much voltage is required to push 1 ampere of current through 1 ohm of resistance?

Explanation

According to Ohm's law, the voltage required to push 1 ampere of current through 1 ohm of resistance is 1 Volt. Ohm's law states that the voltage (V) is equal to the current (I) multiplied by the resistance (R), or V = I * R. In this case, the current is 1 ampere and the resistance is 1 ohm, so the voltage required is 1 Volt.

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44. (032) A centrifugal switch is used in a single-phase motor to

Explanation

A centrifugal switch is used in a single-phase motor to de-energize the start windings. The start windings are responsible for providing the initial torque to start the motor. Once the motor reaches a certain speed, the centrifugal switch is activated by the centrifugal force and opens the circuit to the start windings, disconnecting them from the power source. This prevents the start windings from overheating and allows the motor to continue running using only the run windings.

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45. (034) Normally, an across-the-line motor control stops and starts a motor and provides some type of

Explanation

An across-the-line motor control is typically used to start and stop a motor, and it also provides motor over-current protection. This means that it monitors the current flowing through the motor and will automatically shut off power to the motor if the current exceeds a certain limit. This protection is important as it helps prevent damage to the motor and other equipment in the event of a current overload.

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46. (022) Which of the following units of measurement would indicate volume of flow?

Explanation

Barrels per hour would indicate volume of flow because barrels is a unit of volume and hour is a unit of time. By measuring the flow in barrels per hour, we can determine the amount of volume that is flowing within a specific time frame.

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47. (038) Rotor endplay should not exceed

Explanation

The correct answer is 1/32 to 1/16 of an inch. Rotor endplay refers to the amount of movement or play that is acceptable for the rotor in a mechanical system. It is important to have a certain amount of endplay to allow for thermal expansion and contraction, as well as to prevent excessive friction or binding. However, if the endplay is too large, it can result in decreased efficiency, increased wear and tear, and potential damage to the system. Therefore, the acceptable range for rotor endplay is typically specified to be between 1/32 to 1/16 of an inch.

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48. (029) Ohmmeters are used to check for?

Explanation

Ohmmeters are used to check for resistance. Resistance is a measure of how much a material or component opposes the flow of electric current. By measuring the resistance, an ohmmeter can determine if there are any faults or abnormalities in the electrical circuit. It is an essential tool for troubleshooting electrical systems and ensuring that they are functioning properly.

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49. (025) Which of these is the smallest current that can be fatal under certain circumstances?

Explanation

The smallest current that can be fatal under certain circumstances is one-tenth of one amp. This suggests that even a very small amount of current can be dangerous and potentially fatal in certain situations. It emphasizes the importance of electrical safety and the need to be cautious when dealing with electricity.

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50. (022) Which of the following units of measurement would indicate velocity of flow?

Explanation

The unit of measurement that indicates velocity of flow is feet per second. This unit measures the distance traveled in feet divided by the time taken in seconds, giving the speed at which the flow is moving. Gallons per minute measures the volume of flow, not the velocity. Cubic feet per second also measures the volume of flow, but in a different unit. Cubic gallons per minute is not a valid unit of measurement.

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51. (015) What are is Title 40 of the Code of Federal Regulations (CFR) concerned with?

Explanation

Title 40 of the Code of Federal Regulations (CFR) is concerned with the protection of the environment. This title contains regulations and guidelines related to various aspects of environmental protection, such as air and water quality, hazardous waste management, and pollution prevention. It sets standards and requirements for industries, businesses, and individuals to ensure the protection and preservation of the environment.

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52. (018) Which of the following statements defines the third law of motion?

Explanation

The third law of motion states that for every action, there is an equal and opposite reaction. This means that whenever an object exerts a force on another object, the second object will exert an equal and opposite force back on the first object. This law explains how forces interact with each other and is fundamental in understanding the motion of objects.

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53. (031) The component of a 3-phase motor that converts electrical energy to mechanical energy is the

Explanation

The rotor is the component of a 3-phase motor that converts electrical energy to mechanical energy. It is a rotating part of the motor and is typically made up of conductive bars or coils. When current flows through the rotor, it creates a magnetic field that interacts with the stator's magnetic field, causing the rotor to rotate. This rotation generates mechanical energy, which is then used to perform work in various applications.

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54. (039) If a ground exists in a conductor you are testing, you will get a reading of

Explanation

If a ground exists in a conductor, it means that the conductor is directly connected to the ground, creating a path for the flow of electric current. An ohmmeter measures the resistance in a circuit, and if there is a direct connection to ground, the resistance will be extremely low or zero. Therefore, when testing a conductor with a ground using an ohmmeter, the reading will be zero.

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55. (031) The magnetic field of a 3-phase motor is caused by

Explanation

The magnetic field of a 3-phase motor is caused by the current flow in the rotor. When current flows through the rotor windings, a magnetic field is generated. This magnetic field interacts with the stator's magnetic field, causing the rotor to rotate. The resistance in the squirrel cage, impedance in the stator, and voltage in the end bells do not directly cause the magnetic field in the motor.

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56. (010) The National Electrical Code (NEC) (National Fire Protection Association publication 70) is an example of what type of publication?

Explanation

The National Electrical Code (NEC) is a widely recognized standard for electrical installations in the United States. It is developed by the National Fire Protection Association (NFPA), which is a non-profit organization. The NEC is not specific to military or engineering technical letters, and it is not a government or military standard. Therefore, the most appropriate classification for the NEC is a commercial publication.

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57. (007) What Air Force publication governs the wear of respirators?

Explanation

AFOSH STD 48-137 is the correct answer because it is an Air Force publication that specifically governs the wear of respirators. This publication provides guidelines and regulations for the proper use and maintenance of respirators in order to ensure the safety and health of Air Force personnel. It covers topics such as selection, fit testing, training, and maintenance of respirators, and is therefore the most appropriate publication to reference for information regarding the wear of respirators in the Air Force.

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58. (023) A complete cycle of pressure waves and reversals of flow during hydraulic shock occupies the time required for

Explanation

During hydraulic shock, a complete cycle of pressure waves and reversals of flow occurs. This means that the pressure waves travel from the source to the destination and then back to the source, completing one round trip. However, since the question asks for the time required, it is implied that the time for the pressure waves to travel back and forth is considered. Therefore, two round trips are needed to account for the time it takes for the pressure waves to complete their cycle.

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59. (016) How often does a review of each sections waste producing process need to be performed?

Explanation

A review of each section's waste producing process needs to be performed annually. This means that the review should be conducted once every year. This allows for regular monitoring and assessment of the waste producing process to ensure that it is efficient and compliant with regulations. Regular reviews help identify any areas of improvement or potential issues, allowing for timely adjustments to be made. By conducting the review annually, any necessary changes can be implemented in a timely manner to optimize waste management processes.

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60. (019) The formula to determine power is?

Explanation

The formula to determine power is work divided by time. Power is a measure of how quickly work is done or energy is transferred. It is calculated by dividing the amount of work done by the time it takes to do it. This formula allows us to quantify the rate at which work is being done or energy is being transferred.

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61. (020) What are the four main properties that affect liquids?

Explanation

The four main properties that affect liquids are weight, pressure, viscosity, and temperature. Weight refers to the force exerted by gravity on the liquid, affecting its behavior and movement. Pressure is the force applied to the liquid's surface, which can influence its flow and behavior. Viscosity is a measure of a liquid's resistance to flow, with thicker liquids having higher viscosity. Temperature affects the kinetic energy of the liquid's molecules, causing expansion or contraction and influencing its behavior.

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62. (010) American Petroleum Institute (API) publications are useful when determining what type of fuels-related requirements?

Explanation

API publications are useful when determining construction, inspections, and repair requirements related to fuels. These publications provide guidelines, standards, and best practices for the construction, inspection, and repair of fuel-related infrastructure such as pipelines, storage tanks, and refineries. They help ensure that these facilities are built and maintained according to industry standards, ensuring safety, efficiency, and compliance with regulations. By following API publications, organizations can ensure that their construction, inspection, and repair activities meet the necessary requirements and standards in the fuels industry.

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63. (032) The motor that requires some starting mean is the

Explanation

A single-phase alternating current motor requires some starting means because it does not have a rotating magnetic field like a three-phase motor. The starting means could be a starting capacitor or a centrifugal switch, which helps to create the necessary initial torque to start the motor. Without these starting means, the motor may not be able to overcome the initial inertia and start rotating.

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64. (039) Which of the following is not a circuit fault?

Explanation

A closed circuit is not a circuit fault because it is a properly functioning circuit where the current can flow continuously without any interruption. In a closed circuit, the electrical path is complete, allowing the flow of electricity from the power source to the load. This is in contrast to an open circuit, where the path is interrupted, preventing the flow of current. A shorted circuit occurs when there is an unintended connection between two points in the circuit, causing excessive current flow. A grounded circuit is when a wire or component comes into contact with the ground, diverting current away from the intended path.

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65. (019) How much power would be used to move a 15 lb valve housing 10 feet in 5 minutes?

Explanation

To calculate the power used to move the valve housing, we need to use the formula: Power = Work/Time. The work done is equal to the force applied multiplied by the distance moved. In this case, the force applied is the weight of the valve housing, which is 15 lb, and the distance moved is 10 feet. So, the work done is 15 lb * 10 feet = 150 foot-pounds. The time taken is 5 minutes. Therefore, the power used is 150 foot-pounds / 5 minutes = 30 foot-pounds/minute.

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66. (033) What is the primary voltage of a transformer with a secondary voltage of 240 volts and is rated with a 1 to 3 ratio?

Explanation

This question is asking for the primary voltage of a transformer with a secondary voltage of 240 volts and a 1 to 3 ratio. A 1 to 3 ratio means that for every 1 volt on the primary side, there are 3 volts on the secondary side. So, to find the primary voltage, we can divide the secondary voltage by the ratio. 240 volts divided by 3 equals 80 volts, which is the correct answer.

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67. (035) On an across-the-line magnetic starter, the method used to open the contacts when the electromagnetic coil is de-energized are

Explanation

The correct answer is spring tension and gravity. In an across-the-line magnetic starter, the contacts are opened when the electromagnetic coil is de-energized. Spring tension is used to apply force on the contacts, causing them to separate and open the circuit. Gravity also helps in this process by assisting the spring tension in pulling the contacts apart. This combination of spring tension and gravity ensures that the contacts open reliably when the coil is de-energized.

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68. (036) Which one of the following is not a type of shaft misalignment?

Explanation

Skewed is not a type of shaft misalignment. Shaft misalignment refers to the condition where the rotational axis of one shaft is not aligned with the rotational axis of another shaft. The types of shaft misalignment include angular misalignment, parallel misalignment, and combination misalignment. Angular misalignment occurs when the axes of the two shafts intersect but are not parallel. Parallel misalignment occurs when the axes of the two shafts are parallel but not coincident. Combination misalignment is a combination of both angular and parallel misalignment. Skewed, on the other hand, is not a recognized type of shaft misalignment.

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69. (022) Fuel systems are designed so that normal operating fuel flow will not excede

Explanation

Fuel systems are designed to prevent fuel flow from exceeding a certain speed to ensure safe and efficient operation. If the fuel flow exceeds this speed, it can cause turbulence, pressure drops, and other issues that can negatively impact the performance of the system. The correct answer of 12 fps indicates that the fuel flow should not exceed this speed to maintain optimal functioning of the fuel system.

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70. (018) Which law is used to help determine the size pump required to move liquid?

Explanation

The second law is used to help determine the size pump required to move liquid. This law, also known as Newton's second law of motion, states that the force required to accelerate an object is directly proportional to the mass of the object and the acceleration applied to it. In the context of pumping liquid, this means that the size of the pump must be determined based on the mass of the liquid and the desired acceleration or flow rate.

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71. (024) A positive ion is best described as an atom that?

Explanation

A positive ion is formed when an atom loses one or more electrons. Since electrons have a negative charge, losing an electron means the atom now has more protons than electrons, resulting in a positive charge. Therefore, the best description of a positive ion is an atom that has lost an electron and has more protons.

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72. (026) A magnet that is magnetized by induction from an external source is called

Explanation

An artificial magnet is the correct answer because when a magnet is magnetized by induction from an external source, it is not a natural magnet that occurs in nature. Instead, it is created or manufactured by humans, making it an artificial magnet.

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73. (005) What North Atlantic Treaty Organization (NATO) symbol is used on a automotive gasoline (MOGAS) pipeline?

Explanation

The correct answer is F-50. The F-50 symbol is used on an automotive gasoline (MOGAS) pipeline in the North Atlantic Treaty Organization (NATO).

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74. (037) When you clean a motor with compressed air, what is the maximum air pressure to use in pounds per square inch (psi)

Explanation

When cleaning a motor with compressed air, it is recommended to use a maximum air pressure of 25 psi. Using higher pressures can potentially damage the motor or its components.

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75. (013) Who maintains the Petroleum Resource Automated Management (PETRO RAM) program?

Explanation

The correct answer is the Air Force Petroleum Office. The Air Force Petroleum Office is responsible for maintaining the Petroleum Resource Automated Management (PETRO RAM) program. This program helps in managing and tracking petroleum resources within the Air Force.

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76. (040) Ferrule type cartridge fuses have an amperage rating between what values?

Explanation

Ferrule type cartridge fuses have an amperage rating between 0.5 and 60. This means that the fuses can handle a current flow ranging from 0.5 amperes to 60 amperes. These fuses are commonly used in electrical systems to protect against overcurrent and short circuits. The specific amperage rating of a fuse is determined based on the requirements of the circuit it is being used in.

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77. (019) A single pulley with a diameter of 2 inches has what kind of mechanical advantage?

Explanation

A single pulley with a diameter of 2 inches has a mechanical advantage of 1 to 1. This means that the input force and the output force are equal. In other words, the pulley does not provide any mechanical advantage in terms of multiplying or reducing the force applied. The pulley simply changes the direction of the force applied.

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78. (001) Which properties make JP-4 the most dangerous of all the fuels?

Explanation

JP-4 is considered the most dangerous fuel due to its low vapor pressure and high volatility. Low vapor pressure means that it evaporates less readily, leading to a higher concentration of fuel vapors in the air. This increases the risk of combustion and explosion. High volatility refers to its ability to vaporize quickly, making it highly flammable and increasing the risk of ignition. Combined, these properties make JP-4 highly dangerous as even a small spark or heat source can cause it to ignite and result in a catastrophic fire or explosion.

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79. (021) What is the formula for finding the static pressure exerted on the bottom of a fuel tank?

Explanation

The formula for finding the static pressure exerted on the bottom of a fuel tank is Depth X .433 X specific gravity. This formula takes into account the depth of the fuel in the tank, multiplied by a constant value of .433, and then multiplied by the specific gravity of the fuel. This calculation helps to determine the amount of pressure that is being exerted on the bottom of the tank due to the weight of the fuel.

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80. (011) Which of the following is an example of a technical publication?

Explanation

A manufacturer's manual is an example of a technical publication because it provides detailed instructions and information about the operation, maintenance, and troubleshooting of a specific product or equipment. It is designed to assist users in understanding and effectively using the product, and often includes technical diagrams, specifications, and step-by-step procedures. Technical publications like manufacturer's manuals are commonly used in various industries, such as manufacturing, engineering, and technology, to ensure the safe and efficient use of equipment and products.

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81. (019) What type of drive would use two turbine fans that face each other?

Explanation

A fluid drive is a type of drive that uses two turbine fans that face each other. This type of drive relies on the transfer of power through a fluid medium, usually hydraulic oil or transmission fluid. The two turbine fans create a torque converter effect, allowing for smooth and efficient power transmission between the engine and the driven components. This design is commonly used in applications where variable speed control and torque multiplication are required, such as in industrial machinery and automotive transmissions.

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82. (022) What type of liquid flow would be found close to the wall of a pipeline and why?

Explanation

The flow close to the wall of a pipeline is typically laminar and has a very low velocity. This is because the friction between the liquid and the wall slows down the flow, causing it to become more orderly and less turbulent. The low velocity near the wall also helps to maintain the laminar flow pattern.

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83. (028) What type diagram is a simple drawing showing the relationship of system major parts?

Explanation

A block diagram is a simple drawing that shows the relationship between the major parts of a system. It uses blocks to represent the different components or subsystems of the system, and lines to show the connections or relationships between them. This type of diagram is commonly used in engineering and design to provide a visual representation of how the different parts of a system interact and work together.

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84. (020) An increase in temperature causes viscous liquids to flow

Explanation

An increase in temperature causes viscous liquids to flow faster because the increase in temperature leads to a decrease in the viscosity of the liquid. As the temperature rises, the molecules in the liquid gain energy and move more freely, reducing the resistance to flow. Additionally, an increase in weight can occur because some liquids expand when heated, causing an increase in their mass.

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85. (039) What circuit fault exists if there is continuity across any two conductors?

Explanation

If there is continuity across any two conductors, it means that there is a direct connection between them, bypassing the intended circuit path. This indicates a shorted circuit, where the current flows through an unintended path with low resistance.

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86. (011) What type of publication give you specific guidance to organize, prepare, execute and document particular programs and actions?

Explanation

A standard publication provides specific guidance on organizing, preparing, executing, and documenting particular programs and actions. Standards are established guidelines that ensure consistency, efficiency, and quality in various processes and industries. They serve as a reference for best practices and help organizations achieve their objectives effectively. Therefore, a standard publication is the correct answer as it offers specific guidance for organizing, preparing, executing, and documenting programs and actions.

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87. (022) Which of the following physical factors affects the behavior of liquids in both rest and motion?

Explanation

Gravity, atmospheric pressure, and applied forces affect the behavior of liquids in both rest and motion. Gravity causes liquids to flow downwards, creating pressure at the bottom. Atmospheric pressure affects the boiling point and evaporation of liquids. Applied forces, such as pushing or pulling, can change the motion or shape of liquids. These factors play a significant role in determining how liquids behave, whether they are at rest or in motion.

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88. (022) Laminar flow usually occurs in what size pipelines and at what type velocities?

Explanation

Laminar flow refers to the smooth and orderly movement of fluid particles in a pipeline. It occurs when the fluid flows at a low velocity and the pipeline has a large diameter. In this case, the fluid particles move in parallel layers without mixing or turbulence. The large diameter allows for less friction between the fluid and the pipeline walls, while the low velocity prevents the fluid from becoming turbulent. Therefore, the correct answer is large diameter and low velocity.

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89. (022) What happens to fuels kinetic energy and the pressure it will exert when it passes through a venturi?

Explanation

When a fuel passes through a venturi, the velocity of the fuel increases due to the narrowing of the passage. According to the principle of conservation of energy, as the velocity of the fuel increases, its kinetic energy also increases. However, according to Bernoulli's principle, as the velocity of a fluid increases, the pressure it exerts decreases. Therefore, in this case, the fuel's kinetic energy increases while the pressure it exerts decreases.

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90. (030) Which of these items is not part of a direct current (DC) motor?

Explanation

A direct current (DC) motor consists of several components that work together to convert electrical energy into mechanical energy. The stator is a stationary part of the motor that houses the magnets or electromagnets. The end bells are used to enclose the motor and provide support. The armature is the rotating part of the motor that contains the windings and commutator. The brush assembly is responsible for transferring electrical current to the armature. Therefore, the stator is not part of the armature or brush assembly, making it the correct answer.

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91. (035) What type of controller provides a highly accurate method of motor starting and speed control?

Explanation

A solid-state starter is a type of controller that provides a highly accurate method of motor starting and speed control. Unlike manual controllers, which require manual adjustment and are less precise, solid-state starters use electronic components to regulate the motor's speed and starting process. They offer greater accuracy and control over the motor's operation, making them ideal for applications that require precise motor control, such as industrial automation systems. Single-phase and three-phase controllers, on the other hand, refer to the type of power supply used and do not necessarily provide the same level of accuracy and control as a solid-state starter.

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92. (011) What publication lists the recurring maintenance actions and frequencies for petroleum systems?

Explanation

Unified Facilities Criteria (UFC) 3-460-03 is the correct answer because it is a publication that lists the recurring maintenance actions and frequencies for petroleum systems. The UFC is a series of documents that provide planning, design, construction, sustainment, restoration, and modernization criteria for military facilities. UFC 3-460-03 specifically focuses on the maintenance and operation of petroleum systems, making it the most relevant publication for this question.

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93. (029) The readings on a voltmeter indicate?

Explanation

A voltmeter is a device used to measure the electrical potential difference between two points in a circuit. It measures the voltage or electrical pressure. Therefore, the readings on a voltmeter indicate the electrical pressure present in the circuit.

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94. (019) What would the mechanical advantage be if you used a block and tackle with seven supporting ropes, counting the rope you use to pull on?

Explanation

A block and tackle is a system of pulleys that increases the mechanical advantage, making it easier to lift heavy objects. The mechanical advantage is determined by counting the number of supporting ropes. In this case, there are seven supporting ropes, including the rope used to pull on. Therefore, the mechanical advantage would be 7 to 1, meaning that for every unit of force applied, the load would be lifted with seven times that force.

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95. (003) What type of outer garments are preferred when working around fueling operations to reduce the risk of static charges?

Explanation

Cotton garments are preferred when working around fueling operations to reduce the risk of static charges because cotton is a natural fiber that does not generate static electricity. Unlike synthetic materials such as nylon or polyester, which can create static charges when rubbed against other surfaces, cotton does not have this property. Therefore, wearing 100 percent cotton outer garments helps to minimize the risk of static electricity buildup and potential ignition of fuel vapors.

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96. (019) Which of the following is the correct formula for determining the mechanical advantage of the wheel and axle?

Explanation

The mechanical advantage of the wheel and axle is determined by multiplying the radius of the crank by the radius of the axle. This formula takes into account the leverage provided by both the crank and the axle in the system.

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97. (005) Fuel pipeline markings will be color coded in accordance with

Explanation

Fuel pipeline markings will be color coded in accordance with AFM 85-16. This regulation provides guidelines for the identification and marking of fuel pipelines to ensure safety and prevent accidents. It specifies the color codes that should be used to differentiate between different types of fuel and to indicate the direction of flow. Following these color codes helps to prevent mix-ups and confusion, ensuring that the right type of fuel is used in the right place.

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98. (020) Using pascals principle, determine the pressure exerted in a 10-inch cylinder when a connected 1-inch cylinder has 15 pounds per square inch (psi) applied to it?

Explanation

According to Pascal's principle, the pressure exerted in a fluid is transmitted equally in all directions. In this scenario, the 1-inch cylinder has 15 psi applied to it. Since the cylinders are connected, the pressure will be transmitted to the 10-inch cylinder. Therefore, the pressure exerted in the 10-inch cylinder will also be 15 psi.

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99. (034) In a magnetic motor control, when the operating coil is energized, what component does it attract?

Explanation

When the operating coil of a magnetic motor control is energized, it attracts the main contacts. The main contacts are responsible for completing the circuit and allowing the flow of electricity to the motor. When the operating coil is energized, it creates a magnetic field that attracts the main contacts, causing them to close and complete the circuit. This allows the motor to start and operate.

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100. (030) In a direct current (DC) motor, how are the coil ends from the armature winding attached to a commutator (riser)?

Explanation

In a direct current (DC) motor, the coil ends from the armature winding are typically attached to a commutator (riser) through a soldering process. Soldering involves melting a low-temperature metal alloy (solder) to join the coil ends and the commutator. This method ensures a secure electrical connection while allowing for the necessary flexibility in the moving parts of the motor.

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(005) What should you do first if you get soaked with fuel?
(014) What is performed after a contractor has completed work?
(016) Which one of the following is not considered a hazardous...
(024) Which shell of the valance electrons determines whether a...
(017) When disposing of waste water from a fuel tank bottom where do...
(040) When a circuit breaker is in an overload condition it will
(007) Who approves respirators worn by Air Force employees?
(004) After use fuel soaked rags should be placed in 
(006) With a second-degree burn, the skin is best described as
(001) What is the flash point of JP-8 jet fuel?
(009) Where can you find most standard and some technical Air Force...
(008) What type of respirator will water and fuel system maintenance...
(040) What is the first step in replacing a fuse?
(003) How many feet per second (fps) is considered normal flow through...
(006) What should you do if a conscious coworker has swallowed JP-8?
(014) Who do you notify if you see contract workers performing work...
(029) The most important safety precaution you should apply when using...
(029) Ammeters are used to check for?
(024) A material that allows a large number of free electrons to move...
(001) What term describes the temperature at which a liquid actively...
(029) What is the resistance of a circuit with an applied voltage of...
(019) What does a direct drive pump generally use to absorb vibration?
(004) What single element of the fire triangle must we try to...
(038) A motor that operates slowly may have a
(029) The easiest and simplest meter to use for measuring current flow...
(034) Devices used in a magnetic across-the-line motor controllers to...
(037) What type of motor enclosure is used in fuel systems?
(012) Most Defense Energy Support Center (DESC) emergency projects...
(015) In to how many titles is the Code of Federal Regulations (CFR)...
(027) What are the two most common methods of producing voltage?
(027) What type of current flow cannot be transformed from a higher...
(002) What is the human response to fuel vapor exposure at 10,000...
(006) What should you do for a person suffering from heat cramps?
(037) What should be your first check on a motor that seems to be...
(040) To which effect of current flow does a fuse react?
(025) The unified movement of electrons in a specific direction is...
(028) Which of the following best describes a schematic drawing?
(019) How many different classes of levers are there?
(026) When do magnetic lines of force in a magnet cross?
(033) A step-up transformer produces a secondary voltage that is
(036) What type of couplings do large motors usually use?
(018) When pressure is no longer applied to open an automatic valve,...
(025) According to Ohm's law, how much voltage is required to push...
(032) A centrifugal switch is used in a single-phase motor to
(034) Normally, an across-the-line motor control stops and starts a...
(022) Which of the following units of measurement would indicate...
(038) Rotor endplay should not exceed
(029) Ohmmeters are used to check for?
(025) Which of these is the smallest current that can be fatal under...
(022) Which of the following units of measurement would indicate...
(015) What are is Title 40 of the Code of Federal Regulations (CFR)...
(018) Which of the following statements defines the third law of...
(031) The component of a 3-phase motor that converts electrical energy...
(039) If a ground exists in a conductor you are testing, you will get...
(031) The magnetic field of a 3-phase motor is caused by
(010) The National Electrical Code (NEC) (National Fire Protection...
(007) What Air Force publication governs the wear of respirators?
(023) A complete cycle of pressure waves and reversals of flow during...
(016) How often does a review of each sections waste producing process...
(019) The formula to determine power is?
(020) What are the four main properties that affect liquids?
(010) American Petroleum Institute (API) publications are useful when...
(032) The motor that requires some starting mean is the
(039) Which of the following is not a circuit fault?
(019) How much power would be used to move a 15 lb valve housing 10...
(033) What is the primary voltage of a transformer with a secondary...
(035) On an across-the-line magnetic starter, the method used to open...
(036) Which one of the following is not a type of shaft misalignment?
(022) Fuel systems are designed so that normal operating fuel flow...
(018) Which law is used to help determine the size pump required to...
(024) A positive ion is best described as an atom that?
(026) A magnet that is magnetized by induction from an external source...
(005) What North Atlantic Treaty Organization (NATO) symbol is used on...
(037) When you clean a motor with compressed air, what is the maximum...
(013) Who maintains the Petroleum Resource Automated Management (PETRO...
(040) Ferrule type cartridge fuses have an amperage rating between...
(019) A single pulley with a diameter of 2 inches has what kind of...
(001) Which properties make JP-4 the most dangerous of all the fuels?
(021) What is the formula for finding the static pressure exerted on...
(011) Which of the following is an example of a technical publication?
(019) What type of drive would use two turbine fans that face each...
(022) What type of liquid flow would be found close to the wall of a...
(028) What type diagram is a simple drawing showing the relationship...
(020) An increase in temperature causes viscous liquids to flow
(039) What circuit fault exists if there is continuity across any two...
(011) What type of publication give you specific guidance to organize,...
(022) Which of the following physical factors affects the behavior of...
(022) Laminar flow usually occurs in what size pipelines and at what...
(022) What happens to fuels kinetic energy and the pressure it will...
(030) Which of these items is not part of a direct current (DC) motor?
(035) What type of controller provides a highly accurate method of...
(011) What publication lists the recurring maintenance actions and...
(029) The readings on a voltmeter indicate?
(019) What would the mechanical advantage be if you used a block and...
(003) What type of outer garments are preferred when working around...
(019) Which of the following is the correct formula for determining...
(005) Fuel pipeline markings will be color coded in accordance with
(020) Using pascals principle, determine the pressure exerted in a...
(034) In a magnetic motor control, when the operating coil is...
(030) In a direct current (DC) motor, how are the coil ends from the...
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