2A656 Aircraft Electrical And Environmental Systems Journeyman Volume 2
.
Questions and Answers
- 1.
Screwdrivers are sized by the length of the
- A.
Blade
- B.
Shank
- C.
Handle
- D.
Ferrule
Correct Answer
B. ShankExplanation
Screwdrivers are sized by the length of the shank. The shank refers to the rod-like portion of the screwdriver that connects the handle to the blade. The length of the shank determines the reach and depth that the screwdriver can achieve. Different screwdriver sizes are required for different types of screws and applications, and the length of the shank is an important factor in determining the appropriate size for a specific task.Rate this question:
-
- 2.
A properly ground tip on a standard screwdriver
- A.
Fits loosely in the screw slot
- B.
Is wider than the slot
- C.
Is rounded and flat
- D.
Is square and flat
Correct Answer
D. Is square and flatExplanation
A properly ground tip on a standard screwdriver is square and flat. This means that the tip has a square shape with flat edges, allowing it to fit securely into the screw slot. The square shape ensures a better grip and reduces the likelihood of slipping or stripping the screw. The flat edges provide maximum contact with the screw, allowing for effective turning and tightening.Rate this question:
-
- 3.
One of the most important things to remember when using a hammer or any other hand tool is to use a
- A.
Substitute tool if it will save time and movement
- B.
Tool of the right composition or material
- C.
Tool only for its correct purpose
- D.
Tool one size larger than needed
Correct Answer
C. Tool only for its correct purposeExplanation
Using a tool only for its correct purpose is the most important thing to remember when using a hammer or any other hand tool. This ensures safety and prevents damage to the tool, the material being worked on, and oneself. Using a tool for a purpose it is not designed for can lead to accidents, injuries, and damage to both the tool and the workpiece. It is essential to select the appropriate tool for the specific task at hand to ensure efficient and effective results.Rate this question:
-
- 4.
What kind of pliers are mainly for holding or bending flat or round stock?
- A.
Vise grips
- B.
Long-nose
- C.
Multiple slip-joint
- D.
Combination slip-joint
Correct Answer
D. Combination slip-jointExplanation
Combination slip-joint pliers are mainly used for holding or bending flat or round stock. These pliers have a versatile design that allows the user to adjust the jaw opening to accommodate different sizes of stock. The slip-joint feature allows the pliers to be adjusted to different positions, providing flexibility for various tasks. This makes them suitable for holding or bending both flat and round stock effectively.Rate this question:
-
- 5.
One advantage of box-end wrenches is that they
- A.
Are the fastest to use
- B.
Can be hammered on safely
- C.
Are not likely to slip off a nut
- D.
Are easy to use on recessed bolts
Correct Answer
C. Are not likely to slip off a nutExplanation
Box-end wrenches have a closed loop design with a box-like shape at the end, which provides a secure grip on nuts and bolts. This design reduces the chances of the wrench slipping off the nut during use, making it less likely for accidents or damage to occur. Therefore, one advantage of box-end wrenches is that they are not likely to slip off a nut.Rate this question:
-
- 6.
Thickness gauges of various sizes are normally used to measure the
- A.
Debt of a hole
- B.
Thread size of a bolt
- C.
Outside diameter of a tube
- D.
Clearance between two objects
Correct Answer
D. Clearance between two objectsExplanation
Thickness gauges are used to measure the clearance between two objects. This means they are used to determine the gap or space between two surfaces or components. They are not used to measure the debt of a hole, thread size of a bolt, or the outside diameter of a tube. Therefore, the correct answer is measuring the clearance between two objects.Rate this question:
-
- 7.
Before storing a torque wrench you have used, you should
- A.
Lubricate it with a light oil
- B.
Set it at its lowest setting
- C.
Check it for accuracy
- D.
Set it at zero setting
Correct Answer
B. Set it at its lowest settingExplanation
Before storing a torque wrench that has been used, it is recommended to set it at its lowest setting. This is because leaving the wrench at a high setting can cause the internal spring to become compressed over time, leading to inaccurate torque readings. By setting it at the lowest setting, the internal spring is relieved of tension, reducing the risk of damage and ensuring the wrench remains accurate for future use.Rate this question:
-
- 8.
Tubing used in aircraft oxygen, fuel, lubrication, fire extinguishing, instruments, hydraulic and vent lines is
- A.
Stainless steel and teflon alloy
- B.
Stainless steel and copper tubing
- C.
Aluminum alloy and copper tubing
- D.
Aluminum alloy and stainless steel
Correct Answer
D. Aluminum alloy and stainless steelExplanation
The tubing used in aircraft for various purposes such as oxygen, fuel, lubrication, fire extinguishing, instruments, hydraulic and vent lines is made of aluminum alloy and stainless steel. These materials are chosen for their specific properties that make them suitable for these applications. Aluminum alloy is lightweight and has good corrosion resistance, making it ideal for fuel and hydraulic lines. Stainless steel, on the other hand, is strong and resistant to high temperatures, making it suitable for fire extinguishing and high-pressure applications. The combination of these two materials provides a balance of strength, durability, and resistance to corrosion and high temperatures required for aircraft tubing.Rate this question:
-
- 9.
You can identify a fitting by its pipe treads by its
- A.
Color
- B.
Taper
- C.
Lenght
- D.
Inside diameter
Correct Answer
B. TaperExplanation
A fitting can be identified by its pipe threads through its taper. The taper refers to the gradual decrease in diameter of the pipe threads as they extend along the length of the fitting. This taper allows for a tight and secure connection between the fitting and the pipe, preventing any leaks or loosening over time. By examining the taper of the pipe threads, one can determine if a fitting is compatible with a specific pipe size and type, ensuring a proper and reliable fit.Rate this question:
-
- 10.
When torquing a bolt assembly, what is the force applied to overcome friction?
- A.
Torsion
- B.
Tension
- C.
Tensile
- D.
Shear
Correct Answer
A. TorsionExplanation
When torquing a bolt assembly, the force applied to overcome friction is called torsion. Torsion refers to the twisting or rotational force that is applied to an object, in this case, the bolt assembly, in order to overcome the resistance caused by friction. This force is necessary to tighten or loosen the bolt and ensure that it is securely fastened.Rate this question:
-
- 11.
When installing a cotter pin, ensure the prong that bends over the bolt shank does not exceed the bolt nut
- A.
Grip
- B.
Width
- C.
Length
- D.
Diameter
Correct Answer
D. DiameterExplanation
When installing a cotter pin, it is important to ensure that the prong that bends over the bolt shank does not exceed the diameter of the bolt nut. This is because if the prong is wider than the nut, it may not securely hold the pin in place, potentially leading to the pin coming loose or falling out altogether. Therefore, it is crucial to choose a cotter pin with a diameter that matches or is smaller than the diameter of the bolt nut to ensure a proper and secure installation.Rate this question:
-
- 12.
A good rule to follow in using safety wire is
- A.
Never use the single-wire method
- B.
Loop its so that it opposes the loosening end of the part
- C.
The diameter of the wire should fill one-half the hole
- D.
Use safety wire electrical connectors only in cockpit areas
Correct Answer
B. Loop its so that it opposes the loosening end of the partExplanation
Looping the safety wire so that it opposes the loosening end of the part is a good rule to follow in using safety wire. This ensures that the wire will tighten and prevent the part from loosening during use. By looping the wire in this manner, it creates a secure and effective fastening method, enhancing safety in the application.Rate this question:
-
- 13.
Wire insulation may consist of several layers of nonconducting material that provides
- A.
Thermal protection and fluid resistance
- B.
A method of identification
- C.
Protection from freezing
- D.
Strength and flexibility
Correct Answer
A. Thermal protection and fluid resistanceExplanation
Wire insulation may consist of several layers of nonconducting material that provides thermal protection and fluid resistance. These layers help to prevent the wire from overheating and melting, as well as protect it from damage caused by exposure to liquids or fluids. The insulation acts as a barrier between the wire and its surroundings, ensuring that it can safely carry electrical current without any interference or risk of short circuits. Additionally, the insulation also helps to maintain the integrity and longevity of the wire by offering strength and flexibility, allowing it to withstand bending, twisting, and other mechanical stresses.Rate this question:
-
- 14.
Which technical order (TO) provides instructions for the Brady Wire Marking System?
- A.
00-20-1
- B.
00-20-2
- C.
1-1A-8
- D.
1-1A-14
Correct Answer
D. 1-1A-14 -
- 15.
Wires and wire bundles should be supported by clamps or grommets at intervals of no more than
- A.
15 inches
- B.
20 inches
- C.
24 inches
- D.
26 inches
Correct Answer
C. 24 inchesExplanation
Wires and wire bundles should be supported by clamps or grommets at intervals of no more than 24 inches. This is important to ensure that the wires are properly secured and protected from damage. By having support at regular intervals, the wires are less likely to sag or become loose, reducing the risk of electrical shorts or other issues. Additionally, proper support helps to maintain the organization and neatness of the wiring, making it easier to troubleshoot and maintain in the future.Rate this question:
-
- 16.
All wire groups or bundles must be tied when supports are more than
- A.
6 inches
- B.
8 inches
- C.
10 inches
- D.
12 inches
Correct Answer
D. 12 inchesExplanation
When supports are more than 12 inches apart, wire groups or bundles must be tied. This is necessary to ensure that the wires are properly secured and organized, preventing them from sagging or becoming tangled. Tying the wire groups or bundles also helps to maintain the structural integrity of the wiring system and reduces the risk of damage or malfunction.Rate this question:
-
- 17.
Avoid using self-clinching tie straps where temperatures exceed
- A.
185 Degrees
- B.
165 Degrees
- C.
150 Degrees
- D.
100 Degrees
Correct Answer
A. 185 DegreesExplanation
Self-clinching tie straps should not be used in temperatures exceeding 185 degrees because they may not be able to withstand the high temperature and could potentially fail or become damaged. Using them in temperatures higher than their recommended limit could compromise their effectiveness and reliability.Rate this question:
-
- 18.
How may nicked or broken wire stands are allowed on 16-gauge aluminum wire?
- A.
One
- B.
Two
- C.
Three
- D.
None
Correct Answer
D. NoneExplanation
No nicked or broken wire stands are allowed on 16-gauge aluminum wire. This is because any damage to the wire can compromise its structural integrity and increase the risk of electrical hazards such as short circuits, overheating, or fires. Therefore, it is important to ensure that the wire is free from any damage or defects.Rate this question:
-
- 19.
The indent-type crimping tool should be used only on
- A.
Preinsulated splices
- B.
Preinsulated terminals
- C.
Noninsulated terminals
- D.
Noninsulated terminal boards
Correct Answer
C. Noninsulated terminalsExplanation
The indent-type crimping tool should be used only on noninsulated terminals because this type of tool is designed to create a strong and secure connection by indenting the terminal onto the wire. Noninsulated terminals do not have any insulation covering, so the indent-type crimping tool is the most suitable for creating a reliable connection. On the other hand, preinsulated splices and terminals already have insulation covering, so using an indent-type crimping tool may damage the insulation. Similarly, noninsulated terminal boards do not require the use of an indent-type crimping tool as they are not terminals themselves.Rate this question:
-
- 20.
What do you use as juntion points for circuits that are frequently disconnected?
- A.
Connector plugs
- B.
Terminal boards
- C.
Shielded wires
- D.
Splices
Correct Answer
A. Connector plugsExplanation
Connector plugs are used as junction points for circuits that are frequently disconnected because they allow for easy and quick disconnection and reconnection of the circuit. Unlike terminal boards, which are more permanent and require screws or other fasteners, connector plugs provide a convenient and efficient solution for frequently disconnecting circuits. Shielded wires and splices are not specifically designed for easy disconnection and reconnection, making connector plugs the most suitable option in this scenario.Rate this question:
-
- 21.
What ensures a connector plug and receptacle are not mismated?
- A.
Bulkhead receptacle
- B.
Threaded coupling ring
- C.
Pin and socket connection
- D.
Key-and-key way arrangment
Correct Answer
D. Key-and-key way arrangmentExplanation
A key-and-key way arrangement ensures that a connector plug and receptacle are not mismated. This arrangement involves the use of a key on the plug and a corresponding keyway on the receptacle. The key and keyway are designed to fit together in a specific orientation, preventing the plug from being inserted into the receptacle in any other way. This ensures that the connector is properly aligned and prevents any potential damage or malfunction that could occur from a mismatched connection.Rate this question:
-
- 22.
When heat is applied to thermofit material, which is used in compact wire bundles, it will shrink by at least
- A.
One and half times its original diameter
- B.
One-fourth its original diameter
- C.
One-half its original diameter
- D.
One time its original diameter
Correct Answer
C. One-half its original diameterExplanation
When heat is applied to thermofit material, it will shrink by one-half its original diameter. This means that the material will reduce its size to half of its initial diameter when exposed to heat. This shrinkage property of thermofit material is beneficial in compact wire bundles as it allows for a tighter and more secure fit around the wires, ensuring proper insulation and protection.Rate this question:
-
- 23.
The electrical magnetic pulse (EMP)-hardened cable provides a barrier to
- A.
Electrical grounding
- B.
Electrical continuity
- C.
Electrical current flow
- D.
Electrostatic interference
Correct Answer
D. Electrostatic interferenceExplanation
The EMP-hardened cable is designed to protect against electromagnetic pulses, which can cause interference and damage to electrical systems. Electrostatic interference refers to the unwanted electrical signals that can disrupt the proper functioning of electronic devices. Therefore, using an EMP-hardened cable can provide a barrier against electrostatic interference, ensuring that the electrical signals are not affected by external disturbances.Rate this question:
-
- 24.
After bonding or grounding jumper is installed, it should read no more than
- A.
0.02 ohms
- B.
0.01 ohms
- C.
0.2 ohms
- D.
0.1 ohms
Correct Answer
D. 0.1 ohmsExplanation
After bonding or grounding jumper is installed, it should read no more than 0.1 ohms. This means that the resistance between the bonded or grounded components should not exceed 0.1 ohms. This ensures that there is an efficient and safe path for electrical current to flow, preventing the buildup of static electricity and reducing the risk of electrical hazards. A reading higher than 0.1 ohms may indicate a poor connection or inadequate grounding, which could lead to electrical issues or safety concerns.Rate this question:
-
- 25.
Which type of solder is preferred for printed circuit boards?
- A.
40/60
- B.
60/40
- C.
63/37
- D.
64/36
Correct Answer
C. 63/37Explanation
The solder alloy composition 63/37 is preferred for printed circuit boards. This alloy, also known as eutectic solder, has a lower melting point and exhibits excellent wetting properties, allowing it to form strong and reliable connections between the components and the PCB. The 63/37 solder also has a lower risk of creating solder bridges or cold joints, ensuring better overall soldering quality and electrical conductivity.Rate this question:
-
- 26.
Oxide film is removed from the surface of metals during the soldering process by the use of
- A.
A bristle brush
- B.
The soldering flux
- C.
A soldering iron tip
- D.
An approved solvent
Correct Answer
B. The soldering fluxExplanation
During the soldering process, oxide film can form on the surface of metals, which can hinder the bonding of the solder. The soldering flux is used to remove this oxide film by chemically reacting with it. The flux contains chemicals that dissolve the oxide layer, allowing the solder to bond properly with the metal surface. Therefore, the correct answer is the soldering flux.Rate this question:
-
- 27.
In order to shape a soldering iron's copper tip, use
- A.
Fine file while the tip is cold
- B.
Fine file while the tip is hot
- C.
Course file while the tip is cold
- D.
Coarse file while the tip is hot
Correct Answer
A. Fine file while the tip is coldExplanation
Using a fine file while the tip of a soldering iron is cold is the correct method to shape the copper tip. This is because filing the tip while it is cold allows for precise and controlled shaping without the risk of damaging or overheating the tip. Using a fine file ensures that the desired shape and smoothness can be achieved effectively.Rate this question:
-
- 28.
In order to clean a plated solder tip, use
- A.
A fine file while tip is cold
- B.
A course file while the tip is hot
- C.
An abrasive cloth while tip is hot
- D.
An abrasive cloth while tip is cold
Correct Answer
D. An abrasive cloth while tip is coldExplanation
To clean a plated solder tip, it is recommended to use an abrasive cloth while the tip is cold. This is because using a fine file or a course file while the tip is hot can potentially damage the plating. The abrasive cloth provides a gentle yet effective way to remove any debris or oxidation from the tip without causing any harm. Cleaning the tip while it is cold ensures that the plating remains intact and the tip can continue to function properly.Rate this question:
-
- 29.
Prior to soldering electronic equipment, ensure the equipment is
- A.
Disconnected from the power source
- B.
Connected to the power source
- C.
Protected from voltage spikes
- D.
Properly grounded
Correct Answer
A. Disconnected from the power sourceExplanation
Before soldering electronic equipment, it is necessary to disconnect it from the power source to avoid any potential electrical hazards. This ensures the safety of the person performing the soldering task and prevents damage to the equipment. Soldering while the equipment is still connected to the power source can lead to electric shocks or short circuits, which can be dangerous and cause damage to the equipment. Therefore, it is important to always disconnect the equipment from the power source before soldering.Rate this question:
-
- 30.
How should you test the heat of a solder iron?
- A.
Submerge the tip in flux
- B.
Hold the tip near your face
- C.
Touch the tip to the solder, near your body
- D.
Touch the tip to the solder, away from your body
Correct Answer
D. Touch the tip to the solder, away from your bodyExplanation
To test the heat of a solder iron, you should touch the tip to the solder, away from your body. This is the correct answer because touching the tip to the solder allows you to assess the temperature of the iron. By doing it away from your body, you ensure that you don't accidentally burn yourself or cause any harm. This method allows you to determine if the solder iron is hot enough for soldering without risking any injuries.Rate this question:
-
- 31.
The minimum insulation clearance is how many times the wire diameter?
- A.
One
- B.
Two
- C.
Three
- D.
Four
Correct Answer
A. OneExplanation
The minimum insulation clearance is equal to one times the wire diameter. This means that the clearance between the wire and any surrounding insulation should be at least equal to the diameter of the wire itself.Rate this question:
-
- 32.
An acceptable tinned wire has
- A.
No insulation clearance and wire strands covered with solder, but still visible
- B.
No insulation clearance and wire strands covered with solder, but not visible
- C.
An insulation clearance equal to the diameter of the wire and wire strands covered with solder,but not visible
- D.
An insulation clearance equal to the diameter of the wire and wire strands partially covered with solder, and still visible
Correct Answer
C. An insulation clearance equal to the diameter of the wire and wire strands covered with solder,but not visibleExplanation
The acceptable tinned wire should have an insulation clearance equal to the diameter of the wire. This means that there should be no insulation touching the wire strands. Additionally, the wire strands should be covered with solder, but not visible. This ensures that the wire is properly insulated and protected, while also allowing for efficient electrical conductivity.Rate this question:
-
- 33.
After soldering, remove traces of flux with a
- A.
Type writer eraser and approved abrasive compound
- B.
Rubber wheel and approved abrasive compound
- C.
Medium-stiff brush and approved solvent
- D.
Shape knife and approved solvent
Correct Answer
C. Medium-stiff brush and approved solventExplanation
After soldering, it is necessary to remove traces of flux, which is a residue left behind after soldering. The flux can cause corrosion and affect the performance of the soldered joint. Using a medium-stiff brush and an approved solvent is an effective way to clean the flux residue. The brush helps to scrub away the residue, and the solvent helps to dissolve and remove any remaining flux. This combination of tools and solvents is commonly recommended for cleaning soldered joints.Rate this question:
-
- 34.
Which choice best describes a good solder connection?
- A.
A dull gray appearance
- B.
No pits or holes and has good concave fillet
- C.
No pits or holes and has a good convex fillet
- D.
Bright and shiny with a minimum amount of pits or holes
Correct Answer
B. No pits or holes and has good concave filletExplanation
A good solder connection should have no pits or holes, indicating a smooth and solid joint. Additionally, it should have a good concave fillet, meaning that the solder forms a curved shape that fills the joint properly. This ensures a strong and reliable connection.Rate this question:
-
- 35.
When making wire connections to turret terminals, wrap the wire around the terminal at least
- A.
90 degrees
- B.
180 degrees
- C.
270 degrees
- D.
360 dregrees
Correct Answer
B. 180 degreesExplanation
When making wire connections to turret terminals, it is important to wrap the wire around the terminal at least 180 degrees. This ensures a secure and strong connection between the wire and the terminal, minimizing the risk of the wire coming loose or losing contact. Wrapping the wire around the terminal at this angle also provides better stability and conductivity, allowing for efficient transmission of electrical signals or power.Rate this question:
-
- 36.
Prior to soldering a turret terminal what must you do?
- A.
Ensure the wire enters he terminal at an sngle
- B.
Wrap the wire around the terminal at least 180 degrees, but no more that 270 degrees
- C.
Make sure the wire rests loosely against the base in the lower guide slot
- D.
Make sure the wire rest loosely against the shoulder in the upper guide slot
Correct Answer
B. Wrap the wire around the terminal at least 180 degrees, but no more that 270 degreesExplanation
The correct answer is to wrap the wire around the terminal at least 180 degrees, but no more than 270 degrees. This is important because wrapping the wire around the terminal ensures a secure connection and helps to prevent the wire from coming loose during soldering. Wrapping it within the specified range of degrees ensures that the wire is tightly secured without risking damage to the terminal or wire.Rate this question:
-
- 37.
After soldering a connection, what is your next step?
- A.
Use a file to clean the connection
- B.
Pull on the wire to ensure a good connection
- C.
Clean the connection and inspect it for defects
- D.
Reference the insulation clearance from the base of the terminal
Correct Answer
C. Clean the connection and inspect it for defectsExplanation
After soldering a connection, the next step is to clean the connection and inspect it for defects. This is important to ensure that the solder joint is clean and free from any debris or flux residue that may affect its performance. Inspecting the connection for defects such as cold solder joints or insufficient solder can help identify any issues that need to be addressed before moving forward. This step is crucial in maintaining the quality and reliability of the soldered connection.Rate this question:
-
- 38.
You prepped the wire and are ready to solder a cup terminal. What is your next step?
- A.
Insert the tinned wire
- B.
Melt a small amount of solder inside the terminal
- C.
Measure the insulation clearance from the end of the terminal to the insulation
- D.
Remove flux and impurities with a medium-stiff brush dipped in cleaning solvent
Correct Answer
B. Melt a small amount of solder inside the terminalExplanation
After prepping the wire, the next step is to melt a small amount of solder inside the terminal. This is done to ensure a secure and reliable connection between the wire and the terminal. The melted solder fills any gaps or spaces inside the terminal, creating a strong bond. This step also helps in preventing any future loosening or disconnection of the wire from the terminal.Rate this question:
-
- 39.
How many british thermal units (BTU) does it take to raise the temperature of 5 pounds of water 5 degrees Fahrenheit?
- A.
1
- B.
5
- C.
17
- D.
25
Correct Answer
D. 25Explanation
To calculate the number of BTUs required to raise the temperature of water, we need to use the specific heat capacity of water, which is approximately 1 BTU per pound per degree Fahrenheit. In this case, we have 5 pounds of water and we want to raise the temperature by 5 degrees Fahrenheit. Therefore, the calculation would be 5 pounds * 5 degrees Fahrenheit = 25 BTUs.Rate this question:
-
- 40.
What happens when gas is trapped in a cylinder and pressure is applied to the piston, while the temperature remains constant?
- A.
Volume will increase
- B.
Volume will decrease
- C.
Temperature will decrease
- D.
Temperature will not change
Correct Answer
B. Volume will decreaseExplanation
When gas is trapped in a cylinder and pressure is applied to the piston, while the temperature remains constant, the volume of the gas will decrease. This is because according to Boyle's Law, the volume of a gas is inversely proportional to its pressure when the temperature is constant. As the pressure on the gas increases, the gas particles are forced closer together, resulting in a decrease in volume.Rate this question:
-
- 41.
When a gas is heated, its pressure will
- A.
Stay the same
- B.
Fluctuate
- C.
Decrease
- D.
Increase
Correct Answer
D. IncreaseExplanation
When a gas is heated, its particles gain energy and move faster, resulting in increased collisions with the walls of the container. These increased collisions exert a greater force on the walls, leading to an increase in pressure. Therefore, the pressure of a gas will increase when it is heated.Rate this question:
-
- 42.
A permanent magnet
- A.
Loses its retentivity
- B.
Keeps its magnetism
- C.
Loses its permeability
- D.
Keeps small amounts of reluctance
Correct Answer
B. Keeps its magnetismExplanation
A permanent magnet is able to keep its magnetism over a long period of time. Unlike temporary magnets, which lose their magnetism once the external magnetic field is removed, permanent magnets retain their magnetic properties indefinitely. This is due to the alignment of the magnetic domains within the material, which creates a strong and stable magnetic field. Therefore, the correct answer is that a permanent magnet keeps its magnetism.Rate this question:
-
- 43.
The greater the current flow through an electromagnet, the
- A.
Greater the retentivity
- B.
Lesser the field strength
- C.
Greater the field strength
- D.
Higher the core reluctance
Correct Answer
C. Greater the field strengthExplanation
The greater the current flow through an electromagnet, the greater the field strength. This is because the magnetic field produced by an electromagnet is directly proportional to the current passing through it. As the current increases, more magnetic field lines are generated, resulting in a stronger magnetic field.Rate this question:
-
- 44.
The intensity of electrical current flow is measured in
- A.
Volts
- B.
Cycles
- C.
Amperes
- D.
Coulombs
Correct Answer
C. AmperesExplanation
The intensity of electrical current flow is measured in amperes. Amperes, also known as amps, are the unit of measurement for electric current. It represents the rate at which electric charges flow through a conductor. Volts, on the other hand, measure the electric potential difference or voltage, while cycles refer to the frequency of alternating current. Coulombs measure the quantity of electric charge. Therefore, the correct unit of measurement for the intensity of electrical current flow is amperes.Rate this question:
-
- 45.
What is the symbol for Ohms?
- A.
Ω
- B.
M
- C.
~
- D.
∞
Correct Answer
A. ΩExplanation
The symbol for Ohms is Ω.Rate this question:
-
- 46.
The basic function of electricity is to
- A.
Develop energy
- B.
Create energy
- C.
Destroy energy
- D.
Transfer energy
Correct Answer
D. Transfer energyExplanation
Electricity functions by transferring energy from one place to another. When an electric current flows through a wire, it transfers energy from the source of the electricity (such as a power plant) to the destination (such as a light bulb or an appliance). This transfer of energy allows electrical devices to work and perform their intended functions. Therefore, the correct answer is "transfer energy."Rate this question:
-
- 47.
According to Kirchhoff's voltage law, in a closed circuit, the applied voltage is equal to the
- A.
Product of the voltage drops across each resistor
- B.
Sum of the voltage drops around the circuit
- C.
Quotient of resistance divided by current
- D.
Sum of current and resistance
Correct Answer
B. Sum of the voltage drops around the circuitExplanation
Kirchhoff's voltage law states that the sum of the voltage drops around a closed circuit is equal to the applied voltage. This means that as the current flows through the circuit and encounters resistors, there will be voltage drops across each resistor. The sum of these voltage drops will be equal to the applied voltage. Therefore, the correct answer is "sum of the voltage drops around the circuit".Rate this question:
-
- 48.
Applied voltage is a parallel circuit is 12 volts, and there are two parallel branches with one 6-ohm resistor in each branch. the voltage drop across each resistor is
- A.
2 volts
- B.
6 volts
- C.
12 volts
- D.
24 volts
Correct Answer
C. 12 voltsExplanation
In a parallel circuit, the voltage across each branch is the same. Since the applied voltage is 12 volts and there are two parallel branches, the voltage drop across each resistor will be 12 volts.Rate this question:
-
- 49.
The total resistance in a parallel circuit is always
- A.
Equal to the largest resistance in the circuit
- B.
Equal to the smallest resistance in the circuit
- C.
More than the largest resistance in the circuit
- D.
Less than the smallest resistance in the circuit
Correct Answer
D. Less than the smallest resistance in the circuitExplanation
In a parallel circuit, the total resistance is always less than the smallest resistance in the circuit. This is because in a parallel circuit, the current has multiple paths to flow through. Each path offers less resistance than the total resistance of the circuit. Therefore, the total resistance decreases as more paths are added, resulting in a resistance that is less than the smallest resistance in the circuit.Rate this question:
-
- 50.
To find the total resistance in a series-parallel circuit, you must
- A.
Know the total current flow
- B.
Divide current flow by the applied voltage
- C.
Add the total resistance of the parallel part to the total resistance of the series part
- D.
Add the sum of the resistance in the parallel part to the resistance of the series resistor
Correct Answer
C. Add the total resistance of the parallel part to the total resistance of the series partExplanation
To find the total resistance in a series-parallel circuit, you need to add the total resistance of the parallel part to the total resistance of the series part. This is because in a series-parallel circuit, the resistors are arranged both in series and in parallel. In the series part, the resistors are connected end to end, so their resistances add up. In the parallel part, the resistors are connected side by side, so their resistances combine using the reciprocal formula. By adding the resistances of both parts, you can determine the total resistance of the circuit.Rate this question:
-
Back to top