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Quiz Session - Attempts With Random Questions

ASE A Series Exam Questions

Page 3 of 25

41.

The event data recorder (EDR) is embedded into what component? 

  • Airbag controller

  • Body Control Module (BCM)

  • Powertrain Control Module (PCM)

  • Airbag sensor

Correct answer: Airbag controller

An event data recorder (EDR) is used to record parameters just before and after an accident. Typically, the recorder stores the following parameters:

  • Vehicle speed
  • Brake on/off
  • Seat belt fastened
  • G-forces measured by the accelerometer

The EDR is embedded into the airbag controller, where combined data is put into an event file that can be reviewed following an accident. 

42.

Technician A says a blocked cooling passage can cause a valve to burn. Technician B says a corroded head gasket can cause a valve to burn.

Who is correct?

  • Both A and B

  • Technician A

  • Technician B

  • Neither A nor B

Correct answer: Both A and B

Both technicians are correct. Excessive cylinder head temperatures can cause a valve to burn. These high temperatures can result from clogged cooling system passages or a corroded head gasket that is changing the coolant flow.

43.

Which type of axle bearing allows for axle shaft end play adjustment?

  • Tapered roller bearing 

  • Straight roller bearing 

  • Ball bearing 

  • Needle 

Correct answer: Tapered roller bearing

Tapered axle roller bearings allow for axle shaft end play adjustment. The bearing is press fit onto the axle shaft. Shims can be mounted in between the axle housing and brake backing plate to adjust end play.

44.

Technician A says a wide-band O2 sensor heater circuit requires 8 to 10 amps. Technician B says a conventional O2 sensor heater circuit requires 0.8 to 2.0 amps.

Who is correct? 

  • Both A and B

  • Technician A

  • Technician B

  • Neither A nor B

Correct answer: Both A and B

Both technicians are correct. A conventional O2 sensor operates at about 600 degrees and the heater circuit requires 0.8 to 2.0 amps. A wide-band sensor operates from 1,200 to 1,400 degrees and the heater circuit requires 8 to 10 amps.

45.

Technician A says the o-rings can be reused when converting a system from R-12 to R-134a. Technician B says o-rings should be lubricated with clean refrigerant oil prior to assembly.

Who is correct?

  • Technician B

  • Technician A

  • Both A and B

  • Neither A nor B

Correct answer: Technician B

Only technician B is correct. The o-rings should be lubricated with refrigerant oil prior to assembly to ensure a good seal.

However, the o-rings cannot be reused when converting from R-12 to R-134a. The o-rings should be replaced to help prevent traces of R-12 or mineral oil from mixing with the new R-134a refrigerant, which is incompatible. 

46.

Which of the following is least likely to be found in a four-wheel disc brake system?

  • Residual check valve

  • Metering valve 

  • Proportioning valve

  • Combination valve

Correct answer: Residual check valve

Residual check valves are used in some vehicles to keep a slight amount of pressure in the drum brake system. These valves are typically not found on vehicles equipped with four-wheel disc brakes.

Proportioning valves, metering valves, and combination valves can be found in four-wheel disc brake and front-disc/rear-drum systems.

47.

Single-channel ABS systems are mostly used on:

  • RWAL vehicles

  • Front-wheel-drive cars

  • All-wheel-drive SUVS

  • Rear-wheel-drive sedans

Correct answer: RWAL vehicles

The single-channel ABS system is used mostly in RWAL systems. The front wheels have no speed sensor; there is only a single sensor mounted in the differential or transmission.

48.

The turn signals on a vehicle operate slowly. All of the following could be the cause EXCEPT:

  • A blown fuse 

  • A defective flasher unit

  • High resistance in the circuit 

  • Mismatched or an incorrect bulb

Correct answer: A blown fuse

A blown fuse would prevent the turn signals from operating at all. Turn signals that operate slowly could be caused by a defective flasher unit, high resistance in the circuit, or an incorrect (mismatched) bulb.

High resistance in the circuit is often caused by a poor connection or faulty wiring. 

49.

Technician A says that, technically, the IAC is either a stepper motor or a solenoid-operated valve. Technician B says when an engine is started but is still warm from a previous drive, the idle speed doesn't need to increase. 

Who is correct?

  • Technician A

  • Technician B

  • Both A and B

  • Neither A nor B

Correct answer: Technician A

Only technician A is correct. The IAC can be a type of stepper motor which is controlled by a digital output from the PCM. Stepper motors are DC motors that move in fixed steps. Connected to an IAC valve, the stepper motor makes many tiny steps from fully closed to fully open. 

After restarting a warm engine, the idle speed should momentarily rise and then decrease to normal idle speed. This is known as an engine flare. 

50.

What category rating should a digital multimeter have to be used on hybrid vehicles?

  • CAT III

  • CAT I

  • CAT II

  • CAT IV

Correct answer: CAT III

Hybrid vehicles have system voltages higher than a conventional vehicle, reaching as high 650 volts DC. A CAT III multimeter is rated from 600 to 1,000 volts.

A CAT I multimeter is rated for 300 to 800 volts, and a CAT II multimeter is rated for 300 to 600 volts. CAT IV meters are not typically used in automotive applications. There is no such thing as a CAT V multimeter.

51.

Technician A says an adjustable alternator belt can be checked with the deflection method. Technician B says some automatic belt tensioners have minimum and maximum marks on the length indicator. 

Who is correct?

  • Both A and B

  • Technician A

  • Technician B

  • Neither A nor B

Correct answer: Both A and B

Both technicians are correct. An adjustable alternator belt can be checked in two ways: with a belt tension gauge or the deflection method.

If an automatic belt tensioner has a length indicator, there will be minimum and maximum marks for reference. 

52.

Scan tool reprogramming alters which type of memory?

  • EEPROM

  • RAM

  • PROM

  • EPROM

Correct answer: EEPROM

Permanent computer memory is referred to as read-only memory (ROM). Erasable ROM chips are erasable and rewritable, called electrically erasable programmable read-only memory (EEPROM). Programming is typically done with a scan tool.

53.

The torque converter does all of the following except:

  • Disconnect the engine from the transmission, permitting the engine to run with the vehicle stopped

  • Multiply engine torque and transmit it to the transmission

  • Drive the automatic transmission pump

  • Allow slippage so the transmission can remain engaged with the vehicle stopped

Correct answer: Disconnect the engine from the transmission, permitting the engine to run with the vehicle stopped

The clutch in a manual transmission is what disconnects the engine from the transmission to permit the engine to remain running with the vehicle stopped. 

The torque converter in an automatic transmission allows slippage so the transmission can remain engaged with the vehicle stopped. The torque converter multiplies engine torque and transmits it to the transmission and also drives the automatic transmission pump.

54.

Technician A says tapered wheel bearings can be packed by hand. Technician B says they can be packed using a dedicated packing tool.

Who is correct?

  • Both A and B

  • Technician B

  • Technician A

  • Neither A nor B

Correct answer: Both A and B

Bearings can be packed by placing some grease in the palm of your hand and then forcing the grease through the bearing. Bearings can also be packed using a traditional bearing packing tool or a grease-gun-bearing packer.

55.

Variation in SAI from side to side should not exceed:

  • 0.5 degrees

  • 0.2 degrees

  • 0.3 degrees

  • 1.0 degrees

Correct answer: 0.5 degrees

Both SAI and included angle should be within 0.5 degrees from side to side. If they are not, check for suspension damage and proper frame mount location before correcting differences in camber.

56.

During which stroke are both the intake and exhaust valves closed while the piston is moving upward?

  • Compression stroke

  • Intake stroke

  • Power stroke

  • Exhaust stroke

Correct answer: Compression stroke

Both the intake and exhaust valves are closed during the compression stroke. During this time, the piston is also moving upward in the cylinder, compressing the air/fuel mixture.

57.

To properly disarm the air bag system before service, which of the following does not need to be done?

  • Use OBDII scanner to read system codes

  • Disconnect the negative battery cable

  • Wait at least 10 minutes for the capacitors to discharge

  • Reference vehicle service manual

Correct answer: Use OBDII scanner to read system codes

There's no need to use the code scanner to read the DTCs before disarming the system. However, it's vital to disconnect the negative battery cable and wait a minimum of 10 minutes for the capacitors to discharge.

As with all service procedures, the vehicle manual should be referenced for exact instructions. 

58.

Two technicians are discussing harmonic balancer installation. Technician A says some harmonic balancers are installed using a tube-type driver. Technician B says a hammer can be used to install a press-fit harmonic balancer.

Who is correct? 

  • Technician A

  • Technician B

  • Both A and B

  • Neither A nor B

Correct answer: Technician A

Depending on the vehicle, the harmonic balancer is installed in one of three ways:

  • Pulling it in place with the attaching bolt
  • Installing it with a special tool
  • Using a tube-type driver

Technician B is incorrect. Using a hammer to install a press-fit harmonic balancer can damage the balancer, crankshaft, or thrust bearing. Always use the proper tool to install the harmonic balancer.

59.

How much vacuum should a healthy engine produce at sea level?

  • 17 to 22 in. Hg

  • 15 to 20 in. Hg

  • 12 to 17 in. Hg

  • 20 to 24 in. Hg

Correct answer: 17 to 22 in. Hg

Manifold vacuum is developed by the pistons as they move up and down in the cylinder. Engine performance problems will affect vacuum readings. A healthy engine should produce 17 to 22 in. Hg vacuum at sea level.

60.

Two technicians are discussing a dual-mass flywheel. Technician A says a dual-mass flywheel consists of two separate flywheels that twist out of phase to absorb torsional oscillations. Technician B says the starter engages with both flywheels.

Who is correct?

  • Technician A

  • Technician B

  • Both A and B

  • Neither A nor B

Correct answer: Technician A

Only technician A is correct. Some vehicles use dual-mass flywheels in order to dampen engine vibrations and prevent them from being transmitted into the passenger compartment. A dual-mass flywheel consists of two separate flywheels attached by dampening springs. The two flywheels twist out of phase to absorb torsional oscillations.

The starter motor engages only with the primary flywheel.

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