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Quiz Session - Attempts With Random Questions

ASE L3 Exam Questions

Page 3 of 10

41.

A 2004-2009 Prius can store hot coolant at 176 degrees for how many days? 

  • Up to 3 days

  • Up to 5 days

  • Up to 2 days

  • Up to 7 days

Correct answer: Up to 3 days

The Prius can store coolant at 176 degrees for up to 3 days.

42.

Technician A says a crank, no start condition is usually caused by a problem related to the ICE. Technician B says a crank, no start condition is usually caused by the high voltage system. Who is correct?

  • Technician A

  • Technician B

  • Both A and B

  • Neither A nor B

Correct answer: Technician A

Crank, no start conditions are usually caused by a fault within the ICE system.

43.

Technician A says most modern compressors have inverters in them. Technician B says a coolant chiller is a small evaporator. 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. Most modern compressors contain an inverter. A coolant chiller is a mini evaporator.

44.

Technician A says a high-voltage battery cell can be tested with a CAT III multimeter. Technician B says cotton clothing should be worn when working on HV batteries. 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. Battery cell voltage can be checked with a CAT III multimeter. Cotton clothing should be worn because it is less flammable than synthetic clothing. 

45.

Technician A says swapping two of three connections on a three-phase motor generator will cause it to spin backward. Technician B says permanent magnet motors are more efficient than AC synchronous induction motors. 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. AC synchronous induction motors are not as efficient as permanent magnet motors. Switching any two connections on a three-phase MG will cause the motor to spin in the opposite direction. 

46.

Technician A says some vehicles use the A/C system to cool the hybrid battery. Technician B says some vehicles use engine coolant to cool the hybrid battery. 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. Various methods of battery cooling are used, depending on the make/model of the vehicle. Some vehicles use the A/C system for battery cooling, while others use engine coolant.

47.

How many Toyota HEV smart key modes are there?

  • 5 or 6 depending on the model year

  • 3 or 4 depending on the model year

  • 2 or 3 depending on the model year

  • 1 or 2 depending on the model year

Correct answer: 5 or 6 depending on the model year

There are 5 or 6 smart key modes. Emergency off mode is model dependent.

48.

During A/C system testing, a technician finds a high-side pressure reading that is too low and a low-side pressure reading that is too high. Which of the following is the most likely cause?

  • Damaged compressor

  • Refrigerant overcharge 

  • Condenser restriction 

  • Expansion valve stuck open

Correct answer: Damaged compressor

A high-side pressure reading that is too low and a low-side pressure reading that is too high typically indicates either a failed compressor or a loose drive belt. All the other options would result in both the high and low side being too high. 

49.

Technician A says Stabilant 22A is an electrically conductive contact enhancer. Technician B says Stabilant 22A should be used to seal electrical connectors from the elements. Who is correct?

  • Technician A

  • Technician B

  • Both A and B

  • Neither A nor B

Correct answer: Technician A

Only technician A is correct. Stabilant 22A is an electrically conductive contact enhancer. Technician B is wrong because Stabilant 22A is not designed to be used as a sealant. 

50.

What does EVSE stand for?

  • Electric Vehicle Supply Equipment

  • Electric Vehicle Source Energy

  • Electric Vehicle Service Extender

  • Electric Vehicle System Engineering

Correct answer: Electric Vehicle Supply Equipment

Electric Vehicle Supply Equipment (EVSE) control is a protocol used for communication between plug-in hybrids and charging equipment. It provides owners with the information necessary to charge their vehicle properly.

51.

Technician A says that most HEVs use vacuum boosters for the brake assist systems. Technician B says that an electric pump pressurizes the brake fluid in HEVs. Which technician is correct?

  • Technician B

  • Technician A

  • Both A and B

  • Neither A nor B

Correct answer: Technician B

Technician B is correct. Many HEVs use an electric pump to pressurize the brake fluid in a hydraulic accumulator.

While conventional vehicles use hydraulic boosters or vacuum boosters for the brake assist systems, there's no vacuum supply in HEVs when the ICE is off, so technician A is incorrect.

52.

How much oil from a traditional R134a refrigerant does it take to damage a hybrid A/C system?

  • 0.001%

  • 0.01%

  • 0.1%

  • 1%

Correct answer: 0.001%

It only takes 0.001% PAG oil from a traditional R134a refrigerant system to damage a hybrid A/C and/or cause an insulation leak.

53.

A technician is testing a high-voltage capacitor with a megohm meter. The meter resistance reading does not increase as the meter supplies voltage to the capacitor. Which of the following is the technician MOST LIKELY to do?

  • Replace the capacitor

  • Replace the safety interlock

  • Nothing; the capacitor is operating as designed

  • Replace the blown fuse

Correct answer: Replace the capacitor

When a high-voltage capacitor's resistance reading does not change or stays at zero, the capacitor has failed and needs to be replaced.

When everything is running normally, the reading would increase as the voltage is supplied. A bad safety interlock or blown fuse would be diagnosed differently than the capacitor.

54.

Technician A says car carriers should be used to tow HEV vehicles. Technician B says light duty wreckers should be used to tow HEV vehicles. Who is correct?

  • Both A and B

  • Technician A

  • Technician B

  • Neither A nor B

Correct answer: Both A and B

Only light duty wreckers or car carriers should tow disabled hybrid vehicles.

55.

The Toyota Prius is an example of which of the following?

  • Series-parallel hybrid 

  • Series hybrid 

  • Parallel hybrid 

  • Micro hybrid 

Correct answer: Series-parallel hybrid

The Toyota Prius is an example of a series-parallel hybrid. This design incorporates a power split device that allows for the power path from the engine to the wheels to be connected to either of the motor/generators. 

56.

The heater in a hybrid vehicle blows cold when the vehicle is stopped. Which of the following is the most likely cause?

  • Failed high-voltage heater 

  • Failed heater core 

  • Stuck-open thermostat 

  • Low coolant level 

Correct answer: Failed high-voltage heater

Most hybrid vehicles use a high-voltage heater to supply heat to the cabin when the engine isn't running. When the vehicle is stopped, the gas engine is typically turned off and the high-voltage heater is used.

57.

Technician A says PAG oil can be used in an HV air conditioning system. Technician B says POE oil and PAG oil can be used in an HV system. Who is correct? 

  • Neither A nor B

  • Technician A

  • Technician B

  • Both A and B

Correct answer: Neither A nor B

Both technicians are wrong. Only POE can be used in HV systems.

58.

A 20A fuse at 300V can supply how many kilowatts of power?

  • 6kW

  • 5kW

  • 3kW

  • 4kW

Correct answer: 6kW

Voltage multiplied by current equals wattage. A 20A fuse at 300 volts can supply 600 watts. 600 watts is the same as 6kW.

59.

A hybrid vehicle exhibits a shudder when pushed in neutral. Which of the following is the most likely cause?

  • An open winding

  • A short between the stator phase windings and ground

  • Broken transaxle dampener springs 

  • A failed transaxle planetary gear set 

Correct answer: An open winding

A vehicle that is difficult to push and/or produces a thumping in neutral typically indicates an open winding.

60.

The resolver is a sensor used to detect which of the following?

  • The magnetic pole position of the MG

  • The position of the HV contactors

  • The HV battery cell position

  • The speed of the stator

Correct answer: The magnetic pole position of the MG

A resolver is a sensor that detects the magnetic pole position of the MG.

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