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Quiz Session - Attempts With Random Questions

ASE A Series Exam Questions

Page 2 of 25

21.

Wheel speed sensor coil resistance is being measured. Generally, the reading should be around:

  • 1000 ohms 

  • 500 ohms

  • 2000 ohms 

  • 2.5 KΩ 

Correct answer: 1000 ohms

Measuring the wheel speed sensor coil resistance can be helpful in diagnosis. Generally, wheel speed sensors should measure between 800 and 1400 ohms. So a reading of 1000 ohms would indicate proper coil sensor resistance.

22.

Technician A says a rubber-bonded socket tie rod doesn't require lubrication. Technician B says center take-off racks use bolts to secure the inner tie rods to the rack.

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. Rubber-bonded socket tie rod ends use a rubber-bonded steel ball stud. There is no sliding friction inside and no lubrication is needed. Center take-off style rack-and-pinion steering gears use bolts to attach the inner tie rods to the rack.

23.

All of the following are means of lubricating caliper slide points except:

  • Dielectric grease 

  • Silicone grease 

  • Anti-seize compound 

  • Synthetic grease 

Correct answer: Dielectric grease

Most manufacturers suggest one or more of the following greases to lubricate caliper slide points:

  • Lithium-based grease
  • Silicone grease
  • Molybdenum grease
  • Synthetic grease
  • Anti-seize compound

24.

Carbon-fouled spark plugs MOST likely indicate:

  • An overly rich air/fuel mixture

  • Excessive oil usage

  • Pre-ignition

  • A lean air/fuel mixture

Correct answer: An overly rich air/fuel mixture

An engine's state of health can often be determined through spark plug inspection. Carbon-fouled spark plugs are coated in dry black carbon and indicate one or more of the following: excessive idling, an overly rich air/fuel mixture, or a weak ignition system. 

When there's an excessive amount of oil in the combustion chamber, the plugs will have wet deposits. Pre-ignition causes a melted electrode, while a lean air/fuel mixture may lead to white or light gray coloration on the insulator. 

25.

Which of the following drum brake parts prevents the brake shoes from rotating when the brakes are applied?

  • Anchor pin

  • Shoe retaining pin

  • Wheel cylinder

  • Backing plate 

Correct answer: Anchor pin

The anchor pins or blocks prevent the brake shoes from rotating with the drum when the brakes are applied. These posts or blocks are firmly affixed to the backing plate. The cutouts in the brake shoes contact the anchor, which positions the shoes on the backing plate.

The shoe retaining pin only holds the shoe to the backing plate. The wheel cylinder applies hydraulic pressure and is not designed to prevent the shoes from rotating. The drum brake components, minus the drum, are attached to the backing plate—only the wheel cylinder and anchor pins or blocks are firmly affixed.

26.

What is the resistance of most on-off shift solenoids?

  • 10 to 15 ohms 

  • 1 to 5 ohms

  • 50 to 100 ohms 

  • 150 to 200 ohms 

Correct answer: 10 to 15 ohms

On-off shift solenoids are commanded on and off by the PCM or TCM. They can be either normally open or normally closed. The internal resistance of these solenoids should typically measure between 10 and 15 ohms. This can be tested with a digital multimeter.

27.

Which two methods can be used to repair a crack in an aluminum cylinder head?

  • Both metal-stitching and Heliarc (TIG) welding

  • Metal-stitching and mig welding

  • Heliarc (TIG) welding and stick welding

  • Flux welding and MIG welding

Correct answer: Both metal-stitching and Heliarc (TIG) welding

Some cracks in aluminum heads can be repaired by metal-stitching, drilling, and tapping specialized bolts into the crack to seal it. Cracks in aluminum can also be repaired by TIG welding, also called Heliarc, developed specifically for use on aluminum.

28.

Two technicians are discussing speed and torque in a manual transmission. Technician A says torque and speed are directly proportional. Technician B says torque and speed are inversely proportional.

Who is correct?

  • Technician B

  • Technician A

  • Both A and B

  • Neither A nor B

Correct answer: Technician B

Only technician B is correct. Torque and speed are inversely proportional; when one goes up, the other goes down at the same rate. In the case of a 1.5:1 reduction gear, output speed is 66.66% of input speed, while output torque is 150% of input torque.

29.

Technician A says all automatic transmission fluid (ATF) types are interchangeable and that "Mercon V", "Dexron VI", and "Type T-IV" are just manufacturer names for the same product. Technician B says all transmission fluids are not interchangeable and the manufacturer's specific fluid should be used.

Who is correct?

  • Technician B

  • Technician A

  • Both A and B

  • Neither A nor B

Correct answer: Technician B

Manufacturers use ATFs designed for compatibility with the specific materials used inside the transmissions they manufacture, such as friction clutches and oil seals. The ATF's specific additive package and thermal, lubricant, and viscosity qualities are additional considerations.

30.

The blend door of a vehicle shifts to defrost every time the vehicle is under heavy acceleration. Technician A says an engine performance problem could be the cause. Technician B says the vacuum accumulator could be the cause.

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. Many vehicles use engine vacuum to operate the HVAC blend doors. An engine performance problem could result in low engine vacuum, which could cause the blend door to shift under acceleration. A leaking vacuum accumulator could also cause these symptoms.

31.

Typically, all of the following must be done when replacing a compressor except:

  • Remove the pressure sensor

  • Disconnect the hoses

  • Drain and measure the oil 

  • Seal the hoses 

Correct answer: Remove the pressure sensor

The pressure sensor should not have to be removed during compressor replacement, since it is located in the refrigerant line.

All the other options are things that must be done during compressor replacement. This includes disconnecting the hoses, draining and measuring the oil, and sealing the hoses.

32.

What is the state of charge (SOC) of a battery with a reading of 12.20 V with no external load present?

  • 50%

  • 25%

  • 75%

  • 100%

Correct answer: 50%

A fully charged battery will read 12.60 V or slightly higher. At room temperature, a battery reading around 12.20 V is about 50% charged.

 

VoltageSOC
12.60100%
12.4075%
12.2050%
12.025%
<11.90%

33.

When replacing the evaporator, what do many technicians also recommend replacing?

  • Heater core

  • Compressor

  • Condenser 

  • Pressure switch

Correct answer: Heater core

Since the heater core and evaporator are located close to one another inside the dash, many experts recommend replacing them at the same time.

34.

A multiple-plate clutch contains all of the following except:

  • A servo

  • Plates

  • A piston

  • A snap ring

Correct answer: A servo

Servos are used to apply bands, and they are not found in a multiple-plate clutch assembly. The multiple-plate clutch is made up of several plates, a piston, a drum, and a snap ring.  

35.

Most clutch linkage adjustment procedures specify clutch pedal free-play of how much?

  • 0.5 to 1.0 inch

  • 0 inches [no free-play]

  • 0.25 inches

  • 1.0 to 1.25 inches

Correct answer: 0.5 to 1.0 inch

Most lever-type clutch linkage must be adjusted for proper clutch operation. Some cable-type linkage must be adjusted, too. These adjustment procedures typically specify a clutch pedal free-play of 0.5 to 1.0 inch.

36.

The last four digits of a tire DOT code read "3006". What does "30" indicate?

  • The 30th week of the year

  • The 30th day of the month

  • The NHTSA reference code

  • The manufacturer location

Correct answer: The 30th week of the year

The last four digits of the DOT code indicate the week and year the tire was built. In our example, 3006, the tire was built the 30th week of 2006.

37.

All of the following are true regarding ATF coolers except:

  • All are mounted inside the radiator

  • If the engine is overheating, the transmission could overheat too

  • Some manufacturers use a cooler bypass valve

  • Some vehicles use a valve to block fluid flow in low-temperature conditions

Correct answer: All are mounted inside the radiator

Most transmission coolers are located inside the radiator as a separate section of the tank, but some vehicles use an external ATF-to-air radiator, either on its own or in addition to the internal ATF-to-coolant radiator.

All the other options are true: in the case of in-tank coolers, an overheating engine can overheat the transmission fluid instead of cooling it, some manufacturers use a cooler bypass valve to bypass the cooler if it is restricted, and some vehicles use a valve to block fluid flow in low-temperature conditions.

38.

A recently replaced heater core has broken inlet and outlet tubes. Which of the following is the most likely cause?

  • A heater hose that is too short

  • A faulty heater core

  • Corrosion in the system

  • Air in the system 

Correct answer: A heater hose that is too short

If, during heater core replacement, a too-short hose is used, the core may be damaged as a result. This is because the hoses are attached to the engine, which moves with the engine mounts. A heater hose that is too short may put stress on the heater core and break it.

39.

While measuring the pulse width of a fuel injector with the air intake restricted, there's a change in fuel control. This measurement indicates which of the following?

  • The MAF sensor is working properly

  • The MAF sensor is defective

  • Fuel injector is clogged

  • Fuel injector is leaking

Correct answer: The MAF sensor is working properly

To check the MAF sensor, fuel injector pulse width can be measured. With the air intake restricted, there should be a change in fuel control if the MAF sensor is operating normally. 

If this reading occurs, the MAF sensor isn't defective and the fuel injector isn't clogged or leaking. 

40.

Which type of bearing is most commonly found on non-drive axles?

  • Tapered roller bearings 

  • Ball bearings 

  • Roller bearings 

  • Needle bearings 

Correct answer: Tapered roller bearings

The bearing most commonly found on non-drive axles is the tapered roller bearing. This type of bearing can withstand both radial and axial loads. On non-drive axle wheels, the cup is tightly fitted to the wheel hub and the cone is loosely fitted to the wheel spindle.

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