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Quiz Session - Attempts With Random Questions

ASE T Series Exam Questions

Page 4 of 20

61.

Technician A says barometric pressure is used to calculate glow plug on time. Technician B says the oxygen sensor signal is used to calculate glow plug on time. Who is correct?

  • Technician A

  • Technician B

  • Both A and B

  • Neither A nor B

Correct answer: Technician A

Only technician A is correct. Typically, the main inputs to the ECM for calculating glow plug on time are battery voltage, engine oil temperature and barometric pressure. The oxygen sensor signal is not used. 

62.

Technician A says the sides of the lifter should be coated in pre-lube during installation. Technician B says the area where the lifter contacts the camshaft should be coated in pre-lube during installation. Who is correct?

  • Technician B

  • Technician A

  • Both A and B

  • Neither A nor B

Correct answer: Technician B

Lifters must be primed prior to installation. This involves applying pre-lube to the portion of the lifter that contacts the camshaft. 

63.

When replacing brake shoes or pads, the friction code can be found stamped on the:

  • Lining material

  • Caliper

  • Door jamb

  • Backing plate

Correct answer: Lining material

It's important to match the friction code stamped on the lining material to be sure the correct lining is installed. Incorrect brake lining can result in brake wear or poor breaking performance. 

64.

Technician A says a transmission temperature sensor can be tested by comparing the resistance values to a chart obtained from the manufacturer. Technician B says a transmission temperature sensor can be tested by placing a resistor in place of the sensor. 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. Transmission temperature sensors are thermistors, which change their internal resistance according to temperature. One way to test these sensors is by comparing the value read from the sensor to that from the manufacturer's temperature to resistance chart. Another way to test a transmission temperature sensor is to place a variable resistor in place of the sensor.

65.

Which of the following is the least likely cause of clutch friction disc failure?

  • A worn pilot bearing

  • Improper adjustment of the pressure plate

  • Improper adjustment of external linkage 

  • Grease or oil contamination on the clutch disc

Correct answer: A worn pilot bearing

A worn pilot bearing may result in noise, no release, and even catastrophic transmission failure, but it would not likely cause clutch friction disc failure.

66.

The difference between the operating angles at each end of the driveshaft should be less than:

  • One degree

  • One-half degree

  • Two degrees

  • Three degrees

Correct answer: One degree

Driveshaft operating angle should be measured from front to rear using an electronic inclinometer or base protractor. Generally, the difference between operating angles at each end of the driveshaft should be less than one degree. 

67.

Which of the following axle aligning devices uses a rotatable bushing to achieve axle alignment?

  • Torque leaf

  • Torque arm

  • Torsion bar

  • Radius rod

Correct answer: Torque leaf

A torque leaf is adjusted by rotating an eccentric bushing to achieve the proper alignment. Adjustment for all of the other options is done at the component itself. 

68.

Technician A says in many steering gears, a poppet valve is used to increase pressure on linkage components during times of increased demand for power assist. Technician B says a poppet valve can be adjusted using a dedicated service kit. Who is correct?

  • Technician B

  • Technician A

  • Both A and B

  • Neither A nor B

Correct answer: Technician B

Only technician B is correct. A poppet valve can be adjusted using a dedicated service kit. Technician A is incorrect because a poppet valve is used to decrease pressure when the wheels are turned to their limits.

69.

Which of the following components is not part of the ignition system secondary circuit?

  • Ignition control module

  • Spark plugs 

  • Distributor

  • Ignition coil secondary windings

Correct answer: Ignition control module

There are two sides of the ignition system: the primary side and the secondary side. The primary side is the low voltage, control side of the circuit that includes everything other than the spark plugs, distributor, and ignition coil secondary windings. These items are part of the high voltage, secondary side of the ignition system.

70.

An EGR valve that is stuck open can cause all of the following except:

  • Increased NOx emisssions

  • Stalling

  • Rough idle 

  • Illuminated check engine light

Correct answer: Increased NOx emissions

If the EGR valve is stuck open, exhaust gases will be introduced into the engine at unwanted times. This can result in stalling and/or a rough idle. On the other hand, an EGR valve that is stuck closed can result in increased combustion temperatures, leading to increased NOx emissions. 

71.

Technician A says that a bad resistor may cause a no high-speed blower condition. Technician B says that low coolant levels can cause poor cabin heating.

Who is correct?

  • Technician B

  • Technician A

  • Both A and B

  • Neither A nor B

Correct answer: Technician B

Technician B is correct because proper coolant levels are needed to supply heat to the cabin.

Technician A is incorrect because the high blower runs off the relay and bypasses the resistor.

72.

How long after adding water to a battery can specific gravity be checked?

  • One day

  • Two hours

  • Immediately after

  • 30 minutes

Correct answer: One day

Electolyte readings can be inaccurate if water was recently added to a battery. For that reason, it's best to wait to measure specific gravity until at least a day has passed. It's also acceptable to check it again after the vehicle has been operated for a while, but this may not be as accurate. 

73.

A voltage drop test is being performed on the alternator circuit. Typically, the drop on the positive side of the circuit should not exceed:

  • 0.2 volts

  • 0.1 volts

  • 0.3 volts

  • 0.5 volts

Correct answer: 0.2 volts

Voltage drop testing can be used to find unwanted resistance in the charging system. Typically, voltage drop on the positive side of the circuit should not exceed 0.2 volts and voltage drop on the negative side of the circuit should not exceed 0.3 volts. 

74.

At what approximate psi level will the air brake system low-pressure warning come on?

  • 60 psi

  • 70 psi

  • 50 psi

  • 40 psi

Correct answer: 60 psi

The low-pressure warning light comes on at approximately 60 psi. Therefore, to check the operation of the warning indicator, you would simply need to deplete the system to this level. 

75.

Most coils have a primary winding resistance of:

  • 0.5 to 2.0 ohms

  • 0.05 to 0.2 ohms

  • 3.5 to 4.5 ohms

  • 6 to 8 ohms

Correct answer: 0.5 to 2.0 ohms

Most coils have a primary winding resistance of 0.5 to 2.0 ohms. On the other hand, typical secondary winding resistance is 8,000 to 20,000 ohms. 

76.

How often should air reservoir tanks equipped with a manual valve be drained?

  • At the end of each day of driving

  • Every other day of driving

  • Before and after driving for the day

  • Before driving for the day

Correct answer: At the end of each day of driving

Air reservoir supply tanks build up moisture inside when the hot compressed air cools and condenses. Because of this, they should be drained once a day after driving. Tanks equipped with an automatic valve should be checked for proper operation on a daily basis.

77.

All of the following are used for A/C compressor control EXCEPT:

  • Blower motor resistor

  • Evaporator temperature sensor 

  • Low-pressure switch

  • Dual-pressure switch

Correct answer: Blower motor resistor

The blower motor resistor is responsible for controlling fan speeds but has nothing to do with the A/C compressor control.

The evaporator temperature sensor measures the evaporator core temperature and is used for A/C compressor control. The low-pressure switch and dual-pressure switch are also needed for A/C compressor control. 

78.

Technician A says on some trucks, the water pump is changed at regular intervals. Technician B says gear drives should be checked for lash before reassembly. 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. On some trucks, the water pump is changed at regular intervals to reduce the rate of failure on long-haul trips. The water pump gear drive should also be checked for lash during reassembly. 

79.

A battery load test is being performed. A good battery should not drop below how many volts?

  • 9.6 volts

  • 12 volts 

  • 11.4 volts

  • 10.2 volts 

Correct answer: 9.6 volts

A load test applies a load to the battery of one-half the CCA for 15 seconds. If the battery voltage drops below 9.6 volts, it is not serviceable. 

80.

All of the following specifications should be determined before adjusting ride height except:

  • Gross vehicle weight 

  • Suspension load rating

  • The points of measurement 

  • System air pressure 

Correct answer: Gross vehicle weight

The manufacturer's specifications should be consulted when checking vehicle ride height. These specifications include the type of suspension, the load rating of the suspension, the points of measurement, the measurement specifications, the system air pressure, the tools needed to perform the measurement, and how the measurement will be performed. 

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