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Quiz Session - Attempts With Random Questions

ASE L3 Exam Questions

Page 8 of 10

141.

Technician A says capacitors are used to rectify AC to DC current. Technician B says condensers are used to rectify AC to DC current. 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. Diodes inside the inverter are used to rectify AC to DC current. 

142.

Technician A says all hybrid motors have brushes. Technician B says all hybrid motors are three-phase. Who is correct?

  • Technician B

  • Technician A

  • Both A and B

  • Neither A nor B 

Correct answer: Technician B

Only technician B is correct. All hybrid motors are three-phase, brushless motors. 

143.

Technician A says some vehicles can have the high-voltage battery rebalanced with a scan tool. Technician B says it's not possible to rebalance a high-voltage battery manually. 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 can have the high-voltage battery rebalanced with a scan tool, while others must have the high-voltage battery rebalanced manually.

144.

Technician A says eye protection should be worn when working on a hybrid vehicle. Technician B says that once the high-voltage system has been disconnected, there is no voltage remaining in the hybrid battery box. Which technician is correct?

  • Technician A

  • Both A and B

  • Technician B

  • Neither A nor B

Correct answer: Technician A

Technician A is correct. Eye protection should be worn when working on a hybrid vehicle. This is especially true when working on a high-voltage system.

Technician B is incorrect. Even when the high-voltage system has been disconnected, there is still a dangerous amount of voltage in the hybrid battery box.

145.

Technician A says lead-acid batteries are preferred when the battery is installed inside the vehicle. Technician B says the 12V battery can be installed in the trunk area of an HEV. Which technician is correct?

  • Technician B

  • Technician A

  • Both A and B

  • Neither A nor B

Correct answer: Technician B

Technician B is correct. The 12V battery can be located in the passenger compartment, trunk, or hatch area of an HEV.

Technician A is incorrect because AGM batteries should be used inside vehicles. AGM batteries contain very little liquid compared to lead-acid batteries, which are flooded and can spill electrolytes if damaged.

146.

Technician A says silicon carbide IGBTs add more heat load to liquid cooling systems than silicon IGBTs. Technician B says silicon carbide IGBTs switch faster than silicon IGBTs. Which technician is correct?

  • Technician B

  • Technician A

  • Both A and B

  • Neither A nor B

Correct answer: Technician B

Technician B is correct. Silicon carbide IGBTs switch faster and run cooler than Silicon IGBTs. They don't add as much of a heat load to the liquid cooling system, making technician A incorrect.

147.

An alignment has just been performed on a hybrid vehicle, and now code C1511 is stored. Which of the following is the MOST LIKELY cause?

  • Malfunctioning torque sensor

  • Bad wheel speed sensor

  • ABS solenoid circuit malfunction

  • Power steering control module needs to be recalibrated

Correct answer: Malfunctioning torque sensor

The torque sensor converts mechanical torque to an electrical signal. After an alignment, the sensor may need to be recalibrated.

If a recalibration is not performed, DTCs such as C1511, C1512, and C1513 may be set, indicating that the torque sensor isn't operating as intended.

148.

A TXV performs which function?

  • Controls the volume of refrigerant entering the evaporator

  • Controls cabin heating

  • Controls coolant flow in the system

  • Controls radiator and condenser performance

Correct answer: Controls the volume of refrigerant entering the evaporator

A TXV controls the volume of refrigerant entering the evaporator.

149.

Most HEV and PHEV vehicles on American roads use what ICE engine?

  • Atkinson cycle engine

  • Rotary engine

  • Three-phase induction motor

  • Otto cycle engine

Correct answer: Atkinson cycle engine

The majority of HEV and PHEV models driven today have a traditional Atkinson cycle engine. While the rotary engine and Otto cycle engine are both ICE, these aren't used in today's hybrids.

The three-phase induction motor is an electric motor, not an Internal Combustion Engine (ICE).

150.

Technician A says all HV vehicles use electric motors with stators. Technician B says some vehicles use motors without stators. Who is correct?

  • Technician A

  • Technician B

  • Both technicians A and B

  • Neither technician A nor B

Correct answer: Technician A

All motors on electric vehicles use stators.

151.

Technician A says a megohmmeter is the best tool for diagnosing shorts between motor-generator stator windings. Technician B says a milliohmmeter is the best tool for diagnosing shorts between motor-generator stator windings and ground. 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. A milliohmeter is the best tool for diagnosing shorts between motor-generator stator windings. A megohmmeter is the best tool for diagnosing shorts between motor-generator stator windings and ground. 

152.

How many seconds does the power button need to be held to put a Chevrolet Volt into service mode?

  • Five

  • Two

  • Three

  • Ten

Correct answer: Five

To place the Volt into service mode, hold the power button for five seconds.

153.

Which of the following charging devices supplies 50 to 1000 volts DC at 400 amps?

  • DC level 2

  • DC level 1

  • AC level 1

  • AC level 2

Correct answer: DC level 2

DC level 2 charging charges up to 1000 volts and 400 amps.

154.

In a hybrid vehicle with a planetary gear set, neutral is accomplished by:

  • not sending any voltage to the motors.

  • disconnecting the engine from the transmission.

  • turning both motors at the same time.

  • disconnecting the power split device.

Correct answer: not sending any voltage to the motors.

In a hybrid vehicle with a planetary gear set, neutral is accomplished by not sending any voltage to the motors.

155.

High-voltage protection gloves should be tested by a laboratory how often?

  • Every six months

  • Every 12 months

  • Every three months

  • Every month

Correct answer: Every six months

Class 0 high-voltage protection gloves should be sent out for testing every six months. Visual inspection should occur before every use.

156.

Technician A says a CAT II multimeter can be used to check that voltage has been drained from the inverter capacitors. Technician B says high-voltage gloves should be worn when checking that voltage has been discharged from the capacitors. Which technician is correct?

  • Technician B

  • Technician A

  • Neither technician A nor B

  • Both A and B

Correct answer: Technician B

Technician B is correct. High-voltage gloves should be worn during this process to prevent personal injury.

Technician A is incorrect. A CAT III multimeter is used to check the capacitor voltage level.

157.

Technician A says TSB's should be checked before attempting to diagnose HV battery issues. Technician B says Battery Energy Control Modules are a common failure in HV systems. Who is correct?

  • Technician A

  • Technician B

  • Both techncians

  • Neither technician A nor B

Correct answer: Technician A

Only technician A is correct. Service bulletins should be checked prior to performing any diagnostics on HV batteries. Battery Energy Control Modules rarely fail.

158.

Technician A says deionized water should be used when mixing coolant for an HV vehicle cooling system. Technician B says distilled water should be used when mixing coolant for an HV vehicle cooling system. Who is correct?

  • Technician A

  • Technician B

  • Both A and B

  • Neither A nor B

Correct answer: Technician A

Technician A is correct. Deionized water is not conductive and is the only water that should be used when mixing coolant for an HV vehicle.

159.

All the following transmission types have been used in hybrid vehicles except:

  • Semi-automatic 

  • Fully automatic 

  • Manual 

  • CVT

Correct answer: Semi-automatic

Many different transmission types have been used in hybrid vehicles, including fully automatic, CVT, and manual.

160.

Technician A says a higher charge rate is needed for AGM batteries. Technician B says AGM batteries do not emit flammable gas. 

  • Neither A nor B

  • Technician A

  • Technician B

  • Both A and B

Correct answer: Neither A nor B

AGM batteries need a limited rate of charging to avoid thermal runaway. AGM batteries inside of vehicles need a vent to allow flammable gas to escape a vehicle compartment.

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