3e451 Volume 1 Fuel And Electrical Fundamentals
Questions and Answers
- 1.
(001) What term describes the temperature at which a liquid actively starts to vaporize?
- A.
Boiling point
- B.
Flash point
- C.
Fire Point
- D.
Volatility
Correct Answer
A. Boiling pointExplanation
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.Rate this question:
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- 2.
(001) Which properties make JP-4 the most dangerous of all the fuels?
- A.
High density and low vaporation
- B.
Low density and High specific gravity
- C.
High vapor pressure and low volatility
- D.
Low vapor pressure and high volatility
Correct Answer
D. Low vapor pressure and high volatilityExplanation
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.Rate this question:
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- 3.
(001) What is the flash point of JP-8 jet fuel?
- A.
-20 degrees F
- B.
-40 degrees F
- C.
100 degrees F
- D.
140 degrees F
Correct Answer
C. 100 degrees FExplanation
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.Rate this question:
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- 4.
(002) What is the human response to fuel vapor exposure at 10,000 parts per million (ppm) for 10 minutes?
- A.
Dizziness
- B.
Intoxication
- C.
Nose and throat irritation
- D.
Mucous membrane irritation and numbness
Correct Answer
B. IntoxicationExplanation
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.Rate this question:
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- 5.
(003) How many feet per second (fps) is considered normal flow through a pipeline?
- A.
3 psi
- B.
5 psi
- C.
7-12 psi
- D.
12-15 psi
Correct Answer
C. 7-12 psiExplanation
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.Rate this question:
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- 6.
(003) What type of outer garments are preferred when working around fueling operations to reduce the risk of static charges?
- A.
100 percent nylon
- B.
100 percent cotton
- C.
Combination blends of 50 percent cotton and 50 percent wool
- D.
Combination blends of 50 percent cotton and 50 percent polyester
Correct Answer
B. 100 percent cottonExplanation
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.Rate this question:
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- 7.
(004) What single element of the fire triangle must we try to eliminate?
- A.
Air
- B.
Fuel
- C.
Heat
- D.
Vapors
Correct Answer
C. HeatExplanation
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.Rate this question:
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- 8.
(004) After use fuel soaked rags should be placed in
- A.
Hazardous waste storage areas
- B.
Self-closing metal containers
- C.
Containers filled with water
- D.
Solid-waste disposal pits
Correct Answer
B. Self-closing metal containersExplanation
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.Rate this question:
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- 9.
(005) Fuel pipeline markings will be color coded in accordance with
- A.
AFM 85-16
- B.
ETL 86-4
- C.
AFI 36-2903
- D.
MIL-STD-161
Correct Answer
A. AFM 85-16Explanation
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.Rate this question:
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- 10.
(005) What North Atlantic Treaty Organization (NATO) symbol is used on a automotive gasoline (MOGAS) pipeline?
- A.
F-34
- B.
F-40
- C.
F-50
- D.
F-57
Correct Answer
C. F-50Explanation
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).Rate this question:
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- 11.
(005) What should you do first if you get soaked with fuel?
- A.
Find the nearest emergency shower, remove your clothes, and the drench yourself
- B.
Find the nearest emergency shower and drench yourself with your clothes on
- C.
Return to the shop and take a shower
- D.
Go home and take a shower
Correct Answer
B. Find the nearest emergency shower and drench yourself with your clothes onExplanation
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.Rate this question:
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- 12.
(006) What should you do if a conscious coworker has swallowed JP-8?
- A.
Start cardio pulmonary resuscitation (CPR) immediately
- B.
Remove the co-worker from the area immediately
- C.
Give the person four or five glasses of water
- D.
Induce vomiting as soon as possible
Correct Answer
C. Give the person four or five glasses of waterExplanation
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.Rate this question:
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- 13.
(006) With a second-degree burn, the skin is best described as
- A.
Reddened
- B.
Blistered
- C.
Charred
- D.
Cooked
Correct Answer
B. BlisteredExplanation
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."Rate this question:
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- 14.
(006) What should you do for a person suffering from heat cramps?
- A.
Induce vomiting
- B.
Move the victim to shade
- C.
Remove the victims clothes
- D.
Give the victim large amounts of water
Correct Answer
D. Give the victim large amounts of waterExplanation
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.Rate this question:
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- 15.
(007) What Air Force publication governs the wear of respirators?
- A.
AFOSH STD 48-137
- B.
AFOSH STD 91-25
- C.
AFPAM 36-2903
- D.
MIL-HDBK-32-1275
Correct Answer
A. AFOSH STD 48-137Explanation
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.Rate this question:
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- 16.
(007) Who approves respirators worn by Air Force employees?
- A.
Bioenvironmental engineer (BE)
- B.
Base civil engineer
- C.
Wing safety
- D.
Supervisor
Correct Answer
A. Bioenvironmental engineer (BE)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.Rate this question:
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- 17.
(008) What type of respirator will water and fuel system maintenance (WFM) personnel use for immediate danger to life and health (IDLH) conditions?
- A.
NBC gas mask
- B.
Air purifier
- C.
Supplied-air respirator
- D.
Dual filter air purifying with battery backup
Correct Answer
C. Supplied-air respiratorExplanation
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.Rate this question:
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- 18.
(009) Where can you find most standard and some technical Air Force publications?
- A.
On file at the base library
- B.
On the Air Force publishing website
- C.
In a pouch attached to the associated equipment
- D.
In the files maintained by the squadron historian
Correct Answer
B. On the Air Force publishing websiteExplanation
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.Rate this question:
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- 19.
(010) American Petroleum Institute (API) publications are useful when determining what type of fuels-related requirements?
- A.
Environmental restrictions and transportation
- B.
Construction, inspections and repair
- C.
Emergency planning response
- D.
Testing and quality control
Correct Answer
B. Construction, inspections and repairExplanation
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.Rate this question:
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- 20.
(010) The National Electrical Code (NEC) (National Fire Protection Association publication 70) is an example of what type of publication?
- A.
Military
- B.
Standard
- C.
Commercial
- D.
Engineering technical letters
Correct Answer
C. CommercialExplanation
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.Rate this question:
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- 21.
(011) What type of publication give you specific guidance to organize, prepare, execute and document particular programs and actions?
- A.
Standard
- B.
Technical
- C.
Technical-based
- D.
Information-based
Correct Answer
A. StandardExplanation
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.Rate this question:
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- 22.
(011) Which of the following is an example of a technical publication?
- A.
Air Force Occupational Safety and Health (AFOSH) standard
- B.
Unified Facility Criteria (UFC)
- C.
Manufacturers manual
- D.
Air Force instruction
Correct Answer
C. Manufacturers manualExplanation
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.Rate this question:
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- 23.
(011) What publication lists the recurring maintenance actions and frequencies for petroleum systems?
- A.
National Fire Protection Association publication 70 (NFPA 70)
- B.
American Petroleum Institute (API) Std 650
- C.
Unified Facilities Criteria (UFC) 3-460-03
- D.
Military Standard (MIL-STD-) 161
Correct Answer
C. Unified Facilities Criteria (UFC) 3-460-03Explanation
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.Rate this question:
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- 24.
(012) Most Defense Energy Support Center (DESC) emergency projects involve an actual or threatening fuel spill and are of what nature?
- A.
Containment systems
- B.
Mission cirtical
- C.
Environmental
- D.
Cleanup
Correct Answer
C. EnvironmentalExplanation
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.Rate this question:
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- 25.
(013) Who maintains the Petroleum Resource Automated Management (PETRO RAM) program?
- A.
Air Force Civil Engineer Support Agency
- B.
Defense Energy Support Center
- C.
Logistics Readiness Squadron
- D.
Air Force Petroleum Office
Correct Answer
D. Air Force Petroleum OfficeExplanation
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.Rate this question:
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- 26.
(014) Who do you notify if you see contract workers performing work safely but incorrectly?
- A.
The contractor
- B.
Your supervisor
- C.
Your commander
- D.
The contract monitor
Correct Answer
D. The contract monitorExplanation
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.Rate this question:
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- 27.
(014) What is performed after a contractor has completed work?
- A.
Acceptance inspection
- B.
Facility board approval
- C.
Change orders
- D.
Design review
Correct Answer
A. Acceptance inspectionExplanation
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.Rate this question:
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- 28.
(015) In to how many titles is the Code of Federal Regulations (CFR) divided?
- A.
50
- B.
40
- C.
30
- D.
10
Correct Answer
A. 50Explanation
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.Rate this question:
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- 29.
(015) What are is Title 40 of the Code of Federal Regulations (CFR) concerned with?
- A.
Labor
- B.
Fuel systems
- C.
Transportation
- D.
Protection of the environment
Correct Answer
D. Protection of the environmentExplanation
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.Rate this question:
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- 30.
(016) Which one of the following is not considered a hazardous substance?
- A.
Oily rags
- B.
Used fuel filters
- C.
Lead paint chips
- D.
Stagnant ditch water
Correct Answer
D. Stagnant ditch waterExplanation
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.Rate this question:
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- 31.
(016) How often does a review of each sections waste producing process need to be performed?
- A.
Semi-annually
- B.
Bi-annually
- C.
Quarterly
- D.
Annually
Correct Answer
D. AnnuallyExplanation
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.Rate this question:
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- 32.
(017) When disposing of waste water from a fuel tank bottom where do you put it?
- A.
Sanitary sewer
- B.
Oil/water seperator
- C.
Water treatment facility
- D.
Sewage treatment facility
Correct Answer
B. Oil/water seperatorExplanation
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.Rate this question:
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- 33.
(018) When pressure is no longer applied to open an automatic valve, which of the following unbalanced forces closes it?
- A.
Fuel pressure and diaphragm weight
- B.
Fuel pressure and spring tension
- C.
Gravity and diaphragm weight
- D.
Gravity and spring tension
Correct Answer
D. Gravity and spring tensionExplanation
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.Rate this question:
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- 34.
(018) Which law is used to help determine the size pump required to move liquid?
- A.
Fourth
- B.
Third
- C.
Second
- D.
First
Correct Answer
C. SecondExplanation
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.Rate this question:
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- 35.
(018) Which of the following statements defines the third law of motion?
- A.
More mass requires more force
- B.
Action is equal and opposite to reaction
- C.
Less force is required once an object is set in motion
- D.
Once an object is in motion it will continue in motion
Correct Answer
B. Action is equal and opposite to reactionExplanation
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.Rate this question:
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- 36.
(019) How many different classes of levers are there?
- A.
Two
- B.
Three
- C.
Four
- D.
Five
Correct Answer
B. ThreeExplanation
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.Rate this question:
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- 37.
(019) Which of the following is the correct formula for determining the mechanical advantage of the wheel and axle?
- A.
Radius of crank / radius of axle
- B.
Radius of crank X radius of axle
- C.
Radius of wheel / diameter of axle
- D.
Radius of wheel X diameter of axle
Correct Answer
B. Radius of crank X radius of axleExplanation
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.Rate this question:
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- 38.
(019) A single pulley with a diameter of 2 inches has what kind of mechanical advantage?
- A.
1 to 1
- B.
2 to 1
- C.
3 to 1
- D.
4 to 1
Correct Answer
A. 1 to 1Explanation
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.Rate this question:
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- 39.
(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?
- A.
5 to 1
- B.
6 to 1
- C.
7 to 1
- D.
8 to 1
Correct Answer
C. 7 to 1Explanation
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.Rate this question:
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- 40.
(019) How much power would be used to move a 15 lb valve housing 10 feet in 5 minutes?
- A.
15 foot-pounds/minute
- B.
30 foot-pounds/minute
- C.
150 foot-pounds/minute
- D.
300 foot-pounds/minute
Correct Answer
B. 30 foot-pounds/minuteExplanation
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.Rate this question:
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- 41.
(019) The formula to determine power is?
- A.
Work / time
- B.
Work X time
- C.
Distance / time
- D.
Distance X time
Correct Answer
A. Work / timeExplanation
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.Rate this question:
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- 42.
(019) What does a direct drive pump generally use to absorb vibration?
- A.
Clam shell
- B.
Universal joint
- C.
Flexible coupling
- D.
Mesh gear coupling
Correct Answer
C. Flexible couplingExplanation
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.Rate this question:
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- 43.
(019) What type of drive would use two turbine fans that face each other?
- A.
Flexible drive
- B.
Direct drive
- C.
Fluid drive
- D.
Fan drive
Correct Answer
C. Fluid driveExplanation
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.Rate this question:
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- 44.
(020) What are the four main properties that affect liquids?
- A.
Temperature, molecular attraction, gravity and expansion
- B.
Weight, pressure, viscosity and temperature
- C.
Pressure, temperature, vacuum and gravity
- D.
Weight, gravity, heat and viscosity
Correct Answer
B. Weight, pressure, viscosity and temperatureExplanation
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.Rate this question:
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- 45.
(020) An increase in temperature causes viscous liquids to flow
- A.
Faster and increase in weight
- B.
Faster and decrease in weight
- C.
Slower and increase in weight
- D.
Slower and decrease in weight
Correct Answer
A. Faster and increase in weightExplanation
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.Rate this question:
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- 46.
(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?
- A.
10 psi
- B.
15 psi
- C.
150 psi
- D.
300 psi
Correct Answer
B. 15 psiExplanation
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.Rate this question:
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- 47.
(021) What is the formula for finding the static pressure exerted on the bottom of a fuel tank?
- A.
Depth X .344 X specific gravity
- B.
Depth X .433 X specific gravity
- C.
Depth X .344 / specific gravity
- D.
Depth X .433 / specific gravity
Correct Answer
B. Depth X .433 X specific gravityExplanation
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.Rate this question:
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- 48.
(022) Which of the following units of measurement would indicate volume of flow?
- A.
Barrels per hour
- B.
Meters per hour
- C.
Feet per minute
- D.
Inches per second
Correct Answer
A. Barrels per hourExplanation
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.Rate this question:
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- 49.
(022) Which of the following units of measurement would indicate velocity of flow?
- A.
Feet per second
- B.
Gallons per minute
- C.
Cubic feet per second
- D.
Cubic gallons per minute
Correct Answer
A. Feet per secondExplanation
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.Rate this question:
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- 50.
(022) Laminar flow usually occurs in what size pipelines and at what type velocities?
- A.
Large diameter and low velocity
- B.
Small diameter and low velocity
- C.
Large diameter and high velocity
- D.
Small diameter and high velocity
Correct Answer
A. Large diameter and low velocityExplanation
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.Rate this question:
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Feb 05, 2024Quiz Edited by
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Jul 22, 2013Quiz Created by
Pggomoljak328
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