2018 Fleet Tech Challenge

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| By Erin Ingersoll

Erin Ingersoll

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Quizzes Created: 2 | Total Attempts: 6,491

| Attempts: 426

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1/100 Questions

Disconnecting which of the following would allow the engine to crank but prevent it from starting?
- Neutral safety switch.
- Battery ground cable.
- Ignition switch.
- Ignition system or fuel system.

About This Quiz

The 2018 Fleet Tech Challenge quiz assesses knowledge in automotive electrical systems, focusing on concepts like voltage, current, resistance, and circuit diagnostics. It is designed for technicians to validate their skills in identifying and solving electrical issues in automotive contexts.

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2.

Disc brake rotors can be out of specification in two ways: thickness variation and:
- Hardness.
- Tire runout.
- Lateral runout.
- Specific gravity.
Correct Answer

A. Lateral runout.

Explanation

Disc brake rotors can be out of specification in two ways: thickness variation and lateral runout. Thickness variation refers to uneven thickness across the rotor, which can cause brake pulsation. Lateral runout, on the other hand, refers to the side-to-side movement of the rotor as it rotates. This can result in brake pedal pulsation, steering wheel vibration, and uneven brake pad wear. Therefore, the correct answer is lateral runout.

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1
3.

Air in the brake lines will cause what type of problem?
- Vibration in the brake pedal during stops
- Spongy brake pedal
- Hard brake pedal
- Brake noise
Correct Answer

A. Spongy brake pedal

Explanation

When there is air in the brake lines, it can cause a spongy brake pedal. This means that when the brake pedal is pressed, it feels soft and lacks the usual firmness. This can result in a longer stopping distance and reduced braking efficiency. The presence of air in the brake lines can lead to a loss of hydraulic pressure, which is necessary for effective braking. Therefore, a spongy brake pedal is a common problem that occurs when there is air in the brake lines.

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4.

In many rear-wheel drive vehicles, the wheel bearings are lubricated with that also lubricates the differential assembly.
- Engine oil
- Automatic transmission fluid
- Gear oil
- Compressor lube
Correct Answer

A. Gear oil

Explanation

In many rear-wheel drive vehicles, the wheel bearings are lubricated with gear oil. Gear oil is a type of lubricant specifically designed to withstand the high temperatures and pressures generated by the gears in the differential assembly. It provides effective lubrication to the wheel bearings, ensuring smooth rotation and reducing friction and wear. Engine oil, automatic transmission fluid, and compressor lube are not suitable for lubricating the wheel bearings as they are not designed to withstand the extreme conditions in the differential assembly.

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5.

All of the following is a part of the hydraulic brake system, EXCEPT:
- Brake hoses.
- Disc brake caliper.
- Wheel cylinder.
- Parking brake assembly.
Correct Answer

A. Parking brake assembly.

Explanation

The hydraulic brake system consists of various components that work together to apply and release the brakes. Brake hoses, disc brake calipers, and wheel cylinders are all important parts of this system as they help in the transfer of hydraulic fluid and the activation of the brakes. However, the parking brake assembly is not a part of the hydraulic brake system. The parking brake is a separate mechanism that is used to hold the vehicle in place when parked, and it is usually operated mechanically rather than hydraulically.

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6.

All of the following statements about a tire pressure monitoring system are true, EXCEPT:
- It uses a warning light or message as a driver warning.
- It is often referred to as a TPMS.
- It can automatically stop a leak in a tire.
- It can be diagnosed with an appropriate scan tool.
Correct Answer

A. It can automatically stop a leak in a tire.

Explanation

The given correct answer is that a tire pressure monitoring system (TPMS) cannot automatically stop a leak in a tire. TPMS is designed to monitor the pressure of the tires and alert the driver through a warning light or message if the pressure is low. It is often referred to as TPMS and can be diagnosed with an appropriate scan tool. However, it does not have the capability to automatically stop a leak in a tire.

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7.

A green valve stem cap on tires on recent model-year vehicles means that the tires are:
- Filled with carbon dioxide.
- Filled with nitrogen.
- Filled with hydrogen.
- Filled with argon.
Correct Answer

A. Filled with nitrogen.

Explanation

A green valve stem cap on tires on recent model-year vehicles indicates that the tires are filled with nitrogen. Nitrogen is commonly used in tires due to its ability to maintain tire pressure for a longer period of time compared to regular air. This helps to improve fuel efficiency, increase tire life, and enhance safety on the road.

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8.

The aspect ratio of a tire is:
- The width of the tire.
- The ratio of the inflation pressures.
- The rim diameter.
- The ration of its height to its width.
Correct Answer

A. The ration of its height to its width.

Explanation

The aspect ratio of a tire refers to the ratio of its height to its width. This ratio is important as it determines the tire's profile and how it will perform on the road. A higher aspect ratio indicates a taller tire with a larger sidewall, which can provide a smoother ride and better traction. On the other hand, a lower aspect ratio means a shorter tire with a smaller sidewall, which can enhance handling and responsiveness. Therefore, the aspect ratio is a crucial factor in determining the overall performance and characteristics of a tire.

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9.

Intake valves in the cylinder head are closed by pressure from the:
- Exhaust.
- Intake manifold.
- Valve springs.
- Piston.
Correct Answer

A. Valve springs.

Explanation

Valve springs are responsible for closing the intake valves in the cylinder head. These springs exert pressure on the valves, ensuring that they close tightly and prevent any leakage of air or fuel mixture from the intake manifold into the cylinder. This is crucial for the proper functioning of the engine, as it allows for efficient combustion and power generation.

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10.

When installing a new oil filter, it is a good idea to:
- Wipe a small amount of contact cement on the rubber gasket.
- Clean all oil from the mounting area and install the rubber gasket dry.
- Wipe a small amount of gasket sealer on the new rubber filter gasket.
- Wipe a small amount of oil on the new filter gasket.
Correct Answer

A. Wipe a small amount of oil on the new filter gasket.

Explanation

When installing a new oil filter, it is recommended to wipe a small amount of oil on the new filter gasket. This helps to ensure a proper seal between the filter and the engine, preventing any oil leaks. The oil on the gasket also helps to lubricate the gasket, making it easier to remove the filter during future oil changes. Applying contact cement, gasket sealer, or installing the rubber gasket dry are not necessary or recommended steps for installing an oil filter.

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11.

What is an example open circuit?
- A power wire that has melted to a power wire
- A break in the wire
- A power wire that has melted to a ground wire
- A switch that has current flowing through it
Correct Answer

A. A break in the wire

Explanation

An example of an open circuit is a break in the wire. In an open circuit, there is a gap or interruption in the flow of electric current, preventing it from completing the circuit. In this case, the break in the wire disrupts the path for the current to flow, causing the circuit to be open and preventing the electrical devices from functioning properly.

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12.

Tech A says that in the steering system, play generally results from worn ball sockets and bushings. Tech B says that hard steering is typically caused by tire pressure that is too high. Who is correct?
- Tech A
- Tech B
- Both A and B
- Neither A nor B
Correct Answer

A. Tech A

Explanation

Tech A is correct. In the steering system, play or looseness is often caused by worn ball sockets and bushings. These components can wear out over time due to regular use and can result in a lack of responsiveness or a loose feeling in the steering. On the other hand, Tech B's statement about high tire pressure causing hard steering is not accurate. Tire pressure can affect the handling and responsiveness of the vehicle, but it is not a common cause of hard steering.

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13.

Technician A says that packing a wheel bearing assembly means smearing some grease around the outside of the bearing. Technician B says that a wheel bearing assembly can be packed with a bearing packer. Who is correct?
- Technician A
- Technician B
- Both Technicians A and B
- Neither Technician A nor B
Correct Answer

A. Technician B

Explanation

Technician B is correct. Packing a wheel bearing assembly does not involve smearing grease around the outside of the bearing. Instead, it involves using a bearing packer, which is a tool specifically designed to evenly distribute grease into the bearing. This ensures that the bearing is properly lubricated and reduces the risk of premature wear and failure.

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14.

What is the term used to describe an engine that the valves and piston can hit each other if the timing belt breaks?
- Interference engine
- Freewheeling engine
- Valve in piston engine
- Collision engine
Correct Answer

A. Interference engine

Explanation

An interference engine is a term used to describe an engine in which the valves and piston occupy the same space in the combustion chamber. If the timing belt breaks in an interference engine, the valves and piston can collide with each other, causing serious damage to the engine. This is because the timing belt is responsible for synchronizing the movement of the valves and piston. Therefore, an interference engine requires careful maintenance and timely replacement of the timing belt to prevent such collisions and potential engine failure.

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15.

Heavy pulling of a vehicle to either the left or the right could be due to any of the following except:
- Mismatched tire sizes or pressures.
- Out-of-alignment wheels.
- Nitrogen filled tires.
- A dragging front break assembly.
Correct Answer

A. Nitrogen filled tires.

Explanation

Heavy pulling of a vehicle to either the left or the right can be caused by mismatched tire sizes or pressures, out-of-alignment wheels, or a dragging front brake assembly. However, nitrogen filled tires do not have any direct impact on the vehicle's pulling to either side. Nitrogen is often used to fill tires as it helps maintain tire pressure more consistently, but it does not affect the vehicle's alignment or braking system.

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16.

Tech A says that calipers use steel piston rings to seal each piston. Tech B says that calipers use a square section O-ring to seal each piston. Who is correct?
- Tech A
- Tech B
- Both A and B
- Neither A nor B
Correct Answer

A. Tech B

Explanation

Tech B is correct because calipers use a square section O-ring to seal each piston. This type of O-ring is commonly used in calipers to provide an effective seal and prevent any leakage of brake fluid. Steel piston rings, on the other hand, are not typically used in calipers for sealing purposes.

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17.

Tech A says that rotors should be measured for thickness variation (parallelism). Tech B says that rotors should be measured for lateral runout. Who is correct?
- Tech A
- Tech B
- Both A and B
- Neither A nor B
Correct Answer

A. Both A and B

Explanation

Both Tech A and Tech B are correct. Rotors should be measured for thickness variation (parallelism) to ensure that they are evenly thick across the entire surface. This is important for proper braking performance and to prevent uneven wear. Additionally, rotors should be measured for lateral runout, which refers to the amount of wobbling or side-to-side movement of the rotor as it rotates. Excessive lateral runout can cause vibrations and uneven braking, so it is important to measure and correct if necessary. Therefore, both measurements are necessary for proper rotor maintenance.

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18.

Tech A says that rotors that are too thin cannot handle as much heat and will experience brake fade sooner. Tech B says that brake pedal pulsation is the result of air in the hydraulic system. Who is correct?
- Tech A
- Tech B
- Both A and B
- Neither A nor B
Correct Answer

A. Tech A

Explanation

Tech A is correct. Thin rotors have less mass and surface area, which means they have less capacity to absorb and dissipate heat generated during braking. This can lead to overheating and brake fade, where the brakes lose their effectiveness due to excessive heat. On the other hand, Tech B is incorrect because brake pedal pulsation is usually caused by uneven rotor thickness or warping, not air in the hydraulic system.

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19.

Tech A says that most brake drums are designed to be machined if minor surface issues are present. Tech B says that brake drums can be reused if they are machined larger than specifications, as long as the surface is smooth. Who is correct?
- Tech A
- Tech B
- Both A and B
- Neither A nor B
Correct Answer

A. Tech A

Explanation

Tech A is correct because most brake drums are designed to be machined if minor surface issues are present. This means that if there are small imperfections on the surface of the brake drum, it can be smoothed out through machining instead of being replaced entirely. Tech B's statement about machining the brake drums larger than specifications is incorrect because it can compromise the functionality and safety of the braking system.

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20.

Technician A says a parasitic draw is when the alternator is charging the battery. Technician B says when preforming a parasitic draw test, you should wait until all the modules have gone to sleep. Who is correct?
- Technician A
- Technician B
- Both Technicians A and B
- Neither Technician A nor B
Correct Answer

A. Technician B

Explanation

Technician B is correct. A parasitic draw refers to an abnormal electrical current that continues to flow from the battery even when the vehicle is turned off. This draw can drain the battery over time. To accurately measure the parasitic draw, it is important to wait until all the modules in the vehicle have gone to sleep. This ensures that all electrical systems have shut down and are not contributing to the draw. Therefore, Technician B's statement is correct.

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21.

Fuses prevent circuit damage by:
- Limiting voltage increases.
- Reducing wiring length.
- Decreasing circuit resistance.
- Stopping excessive current flow.
Correct Answer

A. Stopping excessive current flow.

Explanation

Fuses are designed to protect electrical circuits from damage caused by excessive current flow. When the current exceeds a certain limit, the fuse melts and breaks the circuit, stopping the flow of current. This prevents the circuit from overheating and potentially causing a fire or damaging the components. Therefore, the correct answer is stopping excessive current flow.

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22.

Tech A says that to properly check a tie-rod end, the technician should twist the tie-rod end, and any rotational movement means the joint is bad. Tech B says that when checking a tie-rod, any side-to-side movement in the joint means the tie -rod is bad. Who is correct?
- Tech A
- Tech B
- Both A and B
- Neither A nor B
Correct Answer

A. Tech B

Explanation

Tech B is correct. When checking a tie-rod, any side-to-side movement in the joint indicates that the tie-rod is bad. Twisting the tie-rod end, as suggested by Tech A, is not an accurate method for checking its condition.

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23.

A pre-alignment inspection includes all of the following, EXCEPT:
- Removal of any heavy items from the trunk or truck bed.
- Inspecting and adjusting the tire air pressure to specifications on the tire placard.
- Inspecting and confirming correct tire size.
- Removing the front wheels to prepare for adjustment.
Correct Answer

A. Removing the front wheels to prepare for adjustment.

Explanation

A pre-alignment inspection is performed to ensure that the vehicle is ready for the alignment process. This includes checking and adjusting the tire air pressure to the specified levels, inspecting and confirming the correct tire size, and removing any heavy items from the trunk or truck bed that could affect the vehicle's weight distribution. However, removing the front wheels to prepare for adjustment is not part of the pre-alignment inspection.

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24.

Technician A says that a leaky radiator cap could cause an engine to overheat. Technician B says that a thermostat stuck closed could cause the engine to overheat. Who is correct?
- Technician A
- Technician B
- Both Technician A and Technician B
- Neither Technician A nor Technician B
Correct Answer

A. Both Technician A and Technician B

Explanation

Both Technician A and Technician B are correct. A leaky radiator cap can cause the engine to overheat because it allows coolant to escape, leading to a decrease in cooling efficiency. A thermostat stuck closed can also cause the engine to overheat because it prevents the flow of coolant through the radiator, resulting in inadequate cooling. Therefore, both scenarios can contribute to engine overheating.

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25.

Tech A says that some TPMS sensors are part of the tire's valve stem. Tech B says that some TPMS sensors are held on by a large band that fits around the center of the rim. Who is correct?
- Tech A
- Tech B
- Both Tech A and B
- Neither Tech A nor B
Correct Answer

A. Both Tech A and B

Explanation

Both Tech A and B are correct. Some TPMS sensors are indeed part of the tire's valve stem, while others are held on by a large band that fits around the center of the rim.

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26.

All of the following statements are true except:
- The condition in which the front of the wheels are closer together than the rear of the wheels is called toe-in.
- The condition in which the front of the wheels are farther apart than the rear is called toe-out.
- Toe-out on turns is the relative toe setting of the rear wheels as the vehicle turns.
- Improper toe settings cause much faster tire wear than camber or caster.
Correct Answer

A. Toe-out on turns is the relative toe setting of the rear wheels as the vehicle turns.

Explanation

Toe-out on turns is not the relative toe setting of the rear wheels as the vehicle turns.

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27.

Tech A says that brake shoe linings saturated with brake fluid from a leaky wheel cylinder can be cleaned with brake cleaner and reused as long as they aren't worn out. Tech B says that brake shoes should be replaced in axle sets. Who is correct?
- Tech A
- Tech B
- Both A and B
- Neither A nor B
Correct Answer

A. Tech B

Explanation

Tech B is correct. Brake shoes should be replaced in axle sets. This is because the brake shoes on each axle should wear evenly in order to maintain proper braking performance. Replacing only one brake shoe on an axle can lead to uneven braking and potentially cause safety issues. Additionally, if one brake shoe is worn out or damaged, it is likely that the other brake shoe on the same axle will also need to be replaced soon. Therefore, it is recommended to replace both brake shoes on an axle at the same time.

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28.

Two technicians are discussing a vehicle's charging system running at 17.2 volts. Technician A says it is normal for newer vehicles to run a higher voltage like that. Technician B says a faulty voltage regulator could cause that condition. Who is correct?
- Technician A
- Technician B
- Both Technicians A and B
- Neither Technician A nor B
Correct Answer

A. Technician B

Explanation

Technician B is correct. A vehicle's charging system should typically run at around 13.5 to 14.5 volts. A voltage of 17.2 volts is higher than normal and could indicate a faulty voltage regulator. The voltage regulator controls the output voltage of the alternator and if it is faulty, it can cause the charging system to produce excessive voltage. Therefore, Technician B's statement is accurate.

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29.

Two technicians are discussing scope testing. Tech A says that the vertical axis of the screen shows voltage. Tech B says that the horizontal axis shows time. Who is correct?
- Tech A
- Tech B
- Both Tech A and B
- Neither A nor B
Correct Answer

A. Both Tech A and B

Explanation

Both Tech A and B are correct. In scope testing, the vertical axis of the screen represents voltage, while the horizontal axis represents time. This allows technicians to analyze the voltage changes over time and identify any abnormalities or patterns.

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30.

Excessive disc brake rotor thickness variation will cause:
- A squishy brake pedal.
- The brake pads to wear on a slant.
- The caliper pistons to seize in their bores.
- Brake pedal pulsation.
Correct Answer

A. Brake pedal pulsation.

Explanation

Excessive disc brake rotor thickness variation refers to a condition where the rotor is unevenly worn or warped. This can cause the brake pedal to pulsate or vibrate when braking, which is known as brake pedal pulsation. The uneven surface of the rotor causes the brake pads to make uneven contact, resulting in an inconsistent braking force. This can be felt as a pulsating sensation in the brake pedal.

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31.

All of the following about the flexible joints found in the steering linkage are true, EXCEPT:
- They are sometimes equipped with a grease fitting.
- They can be disassembled, cleaned, and repacked with grease.
- They are of ball-and-socket design.
- They allow movement without looseness or play
Correct Answer

A. They can be disassembled, cleaned, and repacked with grease.

Explanation

The given correct answer is "they can be disassembled, cleaned, and repacked with grease." This means that all the statements about the flexible joints found in the steering linkage are true except for this one. The other statements mention that the joints are sometimes equipped with a grease fitting, they are of ball-and-socket design, and they allow movement without looseness or play. However, the statement about disassembling, cleaning, and repacking with grease is not true for these flexible joints.

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32.

All of the following tests are used to test fuel pump performance, EXCEPT:
- Refractometer test.
- Scan tool test.
- Pressure/volume test.
- Lab scope test.
Correct Answer

A. Refractometer test.

Explanation

The refractometer test is not used to test fuel pump performance. A refractometer is a device used to measure the refractive index of a substance, which is not directly related to fuel pump performance. On the other hand, the scan tool test is used to diagnose electronic issues in the fuel pump, the pressure/volume test measures the pressure and flow rate of the fuel pump, and the lab scope test is used to analyze the electrical signals produced by the fuel pump.

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1
33.

Tech A says that lead wheel weights have been outlawed in some states. Tech B says that when balancing a tire, it is good practice to reuse the wheel weights to cut down on waste. Who is correct?
- Tech A
- Tech B
- Both Tech A and B
- Neither Tech A nor B
Correct Answer

A. Tech A

Explanation

Tech A is correct because lead wheel weights have indeed been outlawed in some states. Lead is a toxic substance that can be harmful to the environment, so many states have implemented regulations to ban the use of lead wheel weights in an effort to reduce pollution and protect public health. Therefore, it is important to find alternative materials for wheel weights that are environmentally friendly. Tech B's statement about reusing wheel weights to cut down on waste may be a good practice, but it does not address the fact that lead wheel weights are prohibited in some states.

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34.

The pickle fork tool can be used for:
- Removing rod ends.
- Checking the continuity of the electronic circuit.
- Removing pitman arms.
- Centering the clock spring.
Correct Answer

A. Removing rod ends.

Explanation

The pickle fork tool is specifically designed for removing rod ends. This tool is used to separate the tie rod end from the steering knuckle or control arm. It works by inserting the forked end between the joint and striking it with a hammer, which creates enough force to break the joint free. This makes it easier to replace or repair the rod end without causing damage to other components. The pickle fork tool is not used for checking circuit continuity, removing pitman arms, or centering the clock spring.

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35.

Two technicians are discussing relays. Technician A says that relays can fail because the relay winding is open. Technician B says relays can fail because the switch contacts can have high resistance. Who is correct?
- Technician A
- Technician B
- Both Technicians A and B
- Neither Technician A nor B
Correct Answer

A. Both Technicians A and B

Explanation

Both technicians A and B are correct. A relay can fail if the relay winding is open, meaning there is a break in the coil that prevents current from flowing through it. This will prevent the relay from functioning properly. Additionally, the switch contacts in a relay can develop high resistance over time, which can cause the relay to fail. High resistance can lead to arcing, overheating, and poor electrical conductivity, all of which can affect the performance of the relay. Therefore, both of these factors can contribute to relay failure.

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36.

Tech A says that a tire with more wear on the center of the tread is caused by under inflation Tech B says that feathering of the tire is most commonly a result of excessive toe-in or toe out. Who is correct?
- Tech A
- Tech B
- Both Tech A and B
- Neither A nor B
Correct Answer

A. Tech B

Explanation

Tech B is correct. Feathering of the tire is most commonly a result of excessive toe-in or toe-out. Under inflation of the tire would not cause wear on the center of the tread.

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37.

Tech A says that a micrometer is used to measure rotor thickness variation. Tech B says that a micrometer is used to measure rotor lateral runout. Who is correct?
- Tech A
- Tech B
- Both A and B
- Neither A nor B
Correct Answer

A. Tech A

Explanation

Tech A is correct. A micrometer is a precision measuring instrument used to measure the thickness or diameter of objects with high accuracy. In the context of rotor thickness variation, a micrometer can be used to measure the thickness of the rotor at various points to check for any variations. On the other hand, rotor lateral runout refers to the deviation of the rotor from its true center axis while rotating. This is typically measured using a dial indicator or a runout gauge, not a micrometer. Therefore, Tech B's statement is incorrect.

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38.

The amount of friction between two moving faces in contact with each other is expressed as a ration and is called:
- The coefficient of friction.
- Heat ratio.
- The coefficient of heat.
- Friction.
Correct Answer

A. The coefficient of friction.

Explanation

The amount of friction between two moving faces in contact with each other is expressed as a ratio and is called the coefficient of friction. This ratio represents the relationship between the force of friction and the normal force between the two surfaces. It is a dimensionless quantity that helps in quantifying the level of friction between the surfaces. The coefficient of friction is an important parameter in various engineering and physics applications as it helps in understanding and predicting the behavior of objects in contact.

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39.

The purpose of a drop center in a wheel is to allow for:
- Cooler looking wheels.
- Better heat dissipation.
- Tire mounting and dismounting.
- Keeping the tire on the rim if there is a leak.
Correct Answer

A. Tire mounting and dismounting.

Explanation

A drop center in a wheel allows for easier tire mounting and dismounting. The drop center is a recessed area in the wheel where the tire bead can be easily pushed down into during installation or pulled up out of during removal. This design feature makes it more convenient and efficient for mechanics or individuals to change tires, as it provides a space for the tire bead to move into, reducing the force required for mounting or dismounting.

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40.

Camber is the:
- Axis around which the wheel assembly swivels as it turns.
- Inward or outward (side to side) vertical tilt of the wheel.
- Axis between the upper and lower pivots on the control arms.
- Angle the steering arms make when projected toward the center of the rear axle.
Correct Answer

A. Inward or outward (side to side) vertical tilt of the wheel.

Explanation

The correct answer is "inward or outward (side to side) vertical tilt of the wheel." Camber refers to the angle at which the wheels of a vehicle tilt inward or outward when viewed from the front or rear. This tilt can affect the vehicle's handling and tire wear.

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41.

When the piston moves from bottom dead center (BDC) to top dead center (TDC) or TDC to BDC, it is known as a:
- Cycle.
- Revolution.
- Bore.
- Stroke.
Correct Answer

A. Stroke.

Explanation

When the piston moves from bottom dead center (BDC) to top dead center (TDC) or vice versa, it is referred to as a stroke. A stroke is one complete movement of the piston in an engine cylinder, which includes both the upward and downward motion. This movement is responsible for the intake, compression, power, and exhaust strokes in a four-stroke engine. The other options, cycle, revolution, and bore, do not accurately describe the specific movement of the piston from one dead center position to the other.

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42.

Technician A says that when installing an oil filter, you should tighten it with a filter wrench to prevent it from falling off. Technician B says that oil filters should only be installed by hand. Who is correct?
- Technician A
- Technician B
- Both Technician A and Technician B
- Neither Technician A nor Technician B
Correct Answer

A. Technician B

Explanation

Technician B is correct. Oil filters should only be installed by hand because using a filter wrench to tighten it can lead to over-tightening, which can cause damage to the filter or the engine. Hand-tightening ensures a proper seal without risking damage.

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43.

Technician A says that you can test the ignition coil windings with an ohmmeter. Technician B says you can test the ignition coil windings with a voltmeter. Who is correct?
- Technician A
- Technician B
- Both Technician A and Technician B
- Neither Technician A nor Technician B
Correct Answer

A. Technician A

Explanation

Technician A is correct. An ignition coil is a transformer that converts the battery's low voltage into the high voltage needed to create a spark in the spark plugs. The primary and secondary windings of the ignition coil can be tested using an ohmmeter. By measuring the resistance of the windings, you can determine if there is a short or open circuit. On the other hand, a voltmeter measures voltage, not resistance, so it is not suitable for testing the windings of an ignition coil. Therefore, Technician B is incorrect.

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44.

What type of belt typically drives the camshaft?
- V belt
- Serpentine belt
- Cogged belt
- Stretch-fit belt
Correct Answer

A. Cogged belt

Explanation

A cogged belt is the type of belt that typically drives the camshaft. This type of belt has teeth or cogs on the inner side, which allows it to grip the pulleys more securely and prevent slipping. The teeth on the belt mesh with the grooves on the pulleys, providing a positive drive and ensuring that the camshaft rotates synchronously with the crankshaft. This type of belt is commonly used in engines to drive various components, including the camshaft, and is known for its reliability and durability.

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45.

Tech A says that when performing a brake job on the rear axle of an older vehicle, inspection finds brake fluid under the dust boot; the wheel cylinder should be replaced. Tech B says that when a drum brake return spring has failed, springs on both rear wheels need to be replaced. Who is correct?
- Tech A
- Tech B
- Both A and B
- Neither A nor B
Correct Answer

A. Both A and B

Explanation

Both Tech A and Tech B are correct. Tech A is correct because if brake fluid is found under the dust boot during a brake job on the rear axle of an older vehicle, it indicates a leak in the wheel cylinder and the wheel cylinder should be replaced. Tech B is correct because if a drum brake return spring has failed, it is necessary to replace the springs on both rear wheels to ensure proper brake function and balance.

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46.

Technician A says a higher than normal voltage drop could indicate high resistance. Technician B says high resistance causes an increase in current flow. Who is correct?
- Technician A
- Technician B
- Both Techs A and B
- Neither Technician A nor B
Correct Answer

A. Technician A

Explanation

Technician A is correct. A higher than normal voltage drop can indicate high resistance in a circuit. When there is high resistance, the flow of current is hindered, leading to a higher voltage drop across the resistance. Therefore, Technician A's statement is accurate. Technician B's statement is incorrect because high resistance actually causes a decrease in current flow, not an increase.

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47.

When preforming a battery open circuit voltage test, what voltage indicates a fully charged battery?
- 12.0 volts
- 12.4 volts
- 12.6 volts
- 13.5 volts
Correct Answer

A. 12.6 volts

Explanation

A voltage of 12.6 volts indicates a fully charged battery when performing a battery open circuit voltage test. This voltage level is considered to be the maximum voltage that a fully charged battery can reach.

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48.

You have a 4 ohm resistor in series with a 12 battery. How many amps will flow through the resistor?
- 1 amp
- 2 amps
- 3 amps
- 4 amps
Correct Answer

A. 3 amps

Explanation

The current flowing through a resistor in a series circuit is determined by Ohm's law, which states that current (I) is equal to voltage (V) divided by resistance (R). In this case, the voltage of the battery is 12 volts and the resistance of the resistor is 4 ohms. Therefore, the current flowing through the resistor is 12 volts divided by 4 ohms, which equals 3 amps.

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49.

To perform an internal leak test on a vacuum power booster, let the engine idle and apply the brake pedal with firm pressure. Without moving your foot, shut off the engine and observe the brake pedal for 1 minute. If the power booster is good, what should the brake pedal do?
- Slowly sink
- Pulsate rapidly
- Slowly rise
- Hold steady
Correct Answer

A. Hold steady

Explanation

When performing an internal leak test on a vacuum power booster, the brake pedal should hold steady if the power booster is good. This means that the pedal should not sink slowly, pulsate rapidly, or slowly rise. Holding steady indicates that there are no leaks in the power booster and it is functioning properly.

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2018 Fleet Tech Challenge

Disconnecting which of the following would allow the engine to crank but prevent it from starting?

Quiz Preview

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When preforming a battery open circuit voltage test, what voltage indicates a fully charged battery?

You have a 4 ohm resistor in series with a 12 battery. How many amps will flow through the resistor?

To perform an internal leak test on a vacuum power booster, let the engine idle and apply the brake pedal with firm pressure. Without moving your foot, shut off the engine and observe the brake pedal for 1 minute. If the power booster is good, what should the brake pedal do?