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Quiz Session - Attempts With Random Questions

ASE A Series Exam Questions

Page 1 of 25

1.

All of the following are typical torque converter checks except:

  • Lateral runout  

  • Stator end play

  • Seal wear

  • Damage to the pump drive tags/tangs

Correct answer: Lateral runout

Lateral runout is not a check typically performed on a torque converter. If a converter is to be reused, it should be checked for wetness that could indicate a seam leak, damage to the pump drive tags/tangs, wear to the seal and hub, stator one-way clutch operation, and stator end play.

2.

Which is the least common method for transferring input from the clutch pedal to the throwout bearing?

  • Gears and chains

  • Levers and rods

  • Cable operation

  • Hydraulic force

Correct answer: Gears and chains

The three most common methods for transferring input from the driver's foot to the throwout bearing are levers and rods, cables, and hydraulic cylinders. Levers and rods are used in older vehicles to force the release fork against the throwout bearing. Cables operate similarly to a bicycle brake cable to control the release fork. Hydraulic pressure is often used to apply pressure to the release fork via the slave and master cylinder.

Uncommon clutch release mechanisms include gears and chains and pneumatic (air pressure) systems.

3.

Technician A says electricity can be produced from friction. Technician B says electricity can be produced from pressure.

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. Electricity can be derived from a number of sources including friction, heat, light, chemical reaction, and pressure. Voltage created by pressure is called piezoelectricity. 

Electricity can be made from the friction of two objects rubbing together. As electrons are transferred from one object to the other, both materials become electrically charged. This type of voltage is known as static electricity. 

4.

It's 85°F and 40% relative humidity. A technician is measuring AC cooling performance with a thermometer at the vent.

Generally, what should the temperature be if the system is functioning properly?

  • 45-55°F

  • 20-30°F

  • 55-65°F

  • 30-40°F

Correct answer: 45-55°F

Generally, the temperature at the vents should measure 45-55°F after the system reaches maximum output. Higher temperature may indicate a problem with AC system performance. A manifold gauge set should be attached for further diagnosis. 

5.

Technician A says multiple-plate clutches are a type of holding device. Technician B says bands are a type of holding device. 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. Apply devices, or holding devices, apply force to elements of a planetary gear set. Automatic transmissions typically use a combination of several holding devices, including multiple-plate clutches, one-way clutches, and bands.

6.

What type of TPMS sensor is activated when exposed to 5 to 7 seconds of an uninterrupted 125 KHz signal?

  • Continuous wave

  • Magnetically triggered

  • Pulse-width modulated 

  • Piezoelectric

Correct answer: Continuous wave

A continuous wave type of TPMS sensor will be activated when exposed to 5 to 7 seconds of an uninterrupted 125 KHz signal.

A magnetically triggered sensor is activated by a magnetic force. A pulse-width modulated sensor is activated when exposed to a modulated wave. Piezoelectric is not a type of TPMS sensor.

7.

Two technicians are discussing the engine cooling system. Technician A says all coolant contains ethylene glycol. Technician B says coolant color reflects the additives it contains.

Who is correct?

  • Neither A nor B

  • Technician A

  • Both A and B

  • Technician B

Correct answer: Neither A nor B

Neither technician is correct. Until the mid-1990s, ethylene-glycol-based engine coolant was standard. Since then, most automakers have switched to propylene-glycol-based coolant, which is less toxic and lasts longer. All coolant and additives start out transparent and nearly colorless. Coolant color, such as yellow, pink, red, blue, and others, is simply the result of dye added to differentiate one brand from another.

8.

View the supporting details for measurements taken from a vehicle.

Technician A says the measurements taken indicate an alignment that could cause wear to the inside edges of the tires. Technician B says the measurements taken indicate an alignment that could cause the vehicle to pull to the left.

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. The tires will exhibit feathering wear on the inside edges due to toe out. The right front tire will experience camber wear on the inside edge due to high negative camber. The vehicle may pull to the left due to the camber difference between the left and right front wheels.

9.

Ring gears are being discussed. Technician A says the toe is closest to the outside circumference. Technician B says the heel is closest to the ring gear center.

Who is correct?

  • Neither A nor B

  • Technician A

  • Technician B

  • Both A and B

Correct answer: Neither A nor B

Both technicians are incorrect. Each slanted ring gear tooth has two ends: the toe, which is closest to the ring gear center, and the heel, which is closest to the outside circumference. 

10.

Technician A says the urea injection should be refilled every 3,000 miles. Technician B says the urea injection helps convert NOx into N2 and H2O.

Who is correct?

  • Technician B

  • Technician A

  • Both A and B

  • Neither A nor B

Correct answer: Technician B

Urea (CH4N2O) injection is used to reduce emissions by converting nitrogen oxides (NOx) into nitrogen (N2) and water (H2O). It also helps reduce hydrocarbon (HC) and carbon monoxide (CO) emissions. Technician A is incorrect because the urea tank should be refilled approximately every 7,500 miles, or about every oil change.

11.

Technician A says the synchronizer stop ring slows down the gear so it matches the synchronizer assembly. Technician B says the synchronizer keys limit the rotation of the ring. 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. When a shift is made, the stop ring synchronizes the shift by slowing down the gear so its speed matches that of the synchronizer assembly. The synchronizer keys limit ring rotation from 1/2 tooth misaligned in the forward direction to 1/2 tooth misaligned in the coast direction. These two pieces allow shifts to occur smoothly and without gear clashing.

12.

Approximately how much end play should a non-drive axle wheel bearing have when it is properly adjusted?

  • 0.001 to 0.005 inches

  • 0.000 to 0.001 inches

  • 0.002 to 0.006 inches

  • 0.003 to 0.007 inches

Correct answer: 0.001 to 0.005 inches

If the wheel is properly adjusted, it should have about 0.001 to 0.005 inches of end play. This looseness is necessary to allow the tapered roller bearing to expand when hot.

13.

Brake fluid seepage is visible between the brake master cylinder and the booster. Technician A says this is normal. Technician B says this indicates a leaking master cylinder secondary end seal.

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 seepage between the brake master cylinder and the booster is normal because the rear seal is open to booster vacuum. However, excessive leakage indicates a leaking master cylinder secondary end seal.

14.

What grit sandpaper should be used when surface-finishing a rotor?

  • 150-grit 

  • 80-grit

  • 250-grit

  • 1000-grit

Correct answer: 150-grit

After the final cut of a rotor is complete, it should be finished by applying 150-grit sandpaper to the surface for 60 seconds.

15.

Technician A says the manifold absolute pressure equals barometric pressure minus the intake manifold vacuum. Technician B says an increase in manifold vacuum results in an increase in manifold pressure. 

Who is correct?

  • Technician A

  • Technician B

  • Both A and B

  • Neither A nor B

Correct answer: Technician A

Only technician A is correct. Manifold absolute pressure equals barometric pressure minus the intake manifold vacuum. 

When there's an increase in manifold vacuum, the manifold pressure decreases, not increases. 

16.

Technician A says in most rear-wheel-drive vehicles, the convex surface of the ring gear teeth is known as the drive side. Technician B says the concave surface is known as the coast side.

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. In most cases, the convex surface of the ring gear teeth is known as the drive side and the concave surface is known as the coast side. However, in some front-wheel-drive vehicles, the convex surface is the coast side and the concave surface is the drive side.

17.

Technician A says all glow plugs increase in resistance as temperature increases. Technician B says glow plug resistance can be used to detect a weak cylinder.

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. Glow plug resistance increases as temperature increases. Checking glow plug resistance, both warm and cold, can be used to pinpoint a malfunctioning cylinder. The resistance will not increase as much with temperature if the cylinder is not firing correctly.

18.

Technician A says R-134a systems can use mineral oil for lubrication. Technician B says systems that have been converted from R-12 to R-134a can use ester oil.

Who is correct?

  • Technician B

  • Technician A

  • Both A and B

  • Neither A nor B

Correct answer: Technician B

Only technician B is correct. Systems that have been converted from R-12 to R-134a can use ester oil because it is compatible with R-12 systems and R-134a refrigerant.

Mineral oil is incompatible with R-134a refrigerant. Dedicated R-134a systems use PAG oil.

Dedicated R-12 systems use mineral oil.

19.

Which of the following is true regarding pilot bearings?

  • The pilot bearing rotates when the engine is running

  • All pilot bearings must be packed prior to installation 

  • Pilot bearings are thrust bearings 

  • The pilot bearing is pressed into the back of the camshaft flange 

Correct answer: The pilot bearing rotates when the engine is running

The pilot bearing supports the input shaft in the end of the crankshaft or the center of the flywheel. When the engine is running, the pilot bearing rotates.

The other options are not true: some pilot bearings must be packed prior to installation, but others are sealed from the factory; pilot bearings are ball or caged bearings or solid bushings, not thrust bearings; and pilot bearings are pressed into the end of the crankshaft, not the camshaft.

20.

A speed-density fuel injection system uses all of the following sensors EXCEPT:

  •  MAF sensor

  • TP sensor

  • IAT sensor

  • ECT sensor

Correct answer: MAF sensor

Instead of using an MAF sensor to calculate fuel delivery, a speed-density system uses input from a number of different sensors. These include the MAP sensor, TP sensor, IAT sensor, and ECT sensor. Often referred to as MAP systems, they do not measure airflow directly and are less accurate. For better emissions, most manufacturers have switched to MAF systems.

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