LESSON 2 ELECTROMOTIVE QUIZZES

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LESSON 2 ELECTROMOTIVE QUIZZES

 

Technician A says that leaking components are usually repaired rather than replaced. Technician B says that replacement O-ring can take care of a leak found at a joint. Who is correct? Sec 2.2

  1. Technician B
  2. Both Technician A and B
  3. Technician A
  4. Neither Technician A nor B

 

Technician A says that during normal operation an upper radiator hose that’s cool enough to hold means a defective thermostat. Technician B says water on the passenger side floor often indicates a failed vacuum. Who is correct? Sec 2.1

  1. Technician A
  2. Both A and B
  3. Neither technician A nor B
  4. Technician B

 

All of these are steps to an AC performance test except sec 2.1

  1. turn on the air conditioning and set the blower speed to high
  2. run the engine at 3500 RPM
  3. set the temperature to maximum cool with all doors open
  4. set the mode control to recirculation

 

The outlet line from the evaporator should be sec 2.1

  1. the same temperature as the inlet line
  2. cold
  3. hot
  4. frost covered

 

Technician A says that the airflow default setting in vehicles is defrost, because seeing out the windshield is most important. technician B says that failure for air to flow through any but the defrost vents is likely caused by a vacuum problem.  Who is correct? Sec 2.1

  1. Technician A
  2. Neither Technician A nor B
  3. Both Technicians A and B
  4. Technician B

 

The ambient temperature is 70 and the humidity is low. With the AC on, what should the high-side gauge pressure be? Sec 2.1

  1. 300 to 350 PSI
  2. Not enough information is given
  3. 10 to 50 PSI140 TO 190 PSI

 

Technician A says that the AC system should be evacuated so that all the old oil is removed. Technician B says that evacuation is done to remove moisture from the system. Who is correct? Sec 2.2

  1. Both Technician A and B
  2. Neither Technician A nor B
  3. Technician A
  4. Technician B

 

The photograph above shows sec 2.2

  1. Schrader disconnect fittings for R12 refrigerant service
  2. Quick disconnect fittings for CFC-12 refrigerant service
  3. Quick disconnect fittings for HFC-134a refrigerant service
  4. Schrader disconnect fittings for hfc-134a refrigerant service

 

Technician A says that electric leak detectors make a noise when a leak is detected. Technician B says that often the same leak detector can be used for R-12 and R-134a. Who is correct? Sec 2.1

  1. Technician B only
  2. Neither Technician A nor B
  3. Both Technician A and B
  4. Technician A only

 

It is 90F  in the shop with high humidity. What pressure will be shown on the high-side pressure gauge (AC system on)? Sec 2.1

  1. at least 350 psi
  2. 10 to 50 psi
  3. 40 to 140 psi
  4. 210 to 290 psi

 

In the photograph above, the technician is sec 2.2

  1. removing the compressor magnetic clutch
  2. adjusting the compressor belt tension
  3. adjusting the compressor magnetic clutch air gap
  4. removing the compressor

 

when the condenser airflow is restricted

  1. high-side and low-side pressure is low
  2. low-side pressure is low and high-side pressure is high
  3. high-side and low-side pressure is high
  4. low-side pressure is high and high-side pressure is low

 

Two technicians are discussing specifications for refrigerant. Technician A says that refrigerant oil with 5,000 parts per million (ppm) does not fall within specifications. Technician B says that air can only have a maximum of 330 ppm. Who is correct?

 

  1. Technician A
  2. Technician B
  3. Both Technician A and B
  4. Neither Technician A or B

 

A customer complains that the heater works sometimes, but other times only cold air comes out while driving. Technician A says that the water pump is defective. Technician B says that the cooling system could be low on coolant. Who is correct?

  1. Neither Technician A nor B
  2. Technician B
  3. Both Technician A and B
  4. Technician A

Technician A says that heater temperature maybe controlled by regulating the amount of coolant flowing the use heater core. Technician B says heater temperature maybe be controlled by regulating the amount of air flowing through the heater core. Who is correct?

  1. Neither Technician A nor B
  2. Technician B
  3. Both Technician A and B
  4. Technician A

 

An air conditioning performance check requires the use of a

  1. digital millimeters
  2. thermometer and refrigerator identifier
  3. thermometer and hydrometer
  4. scan tool

 

Technician A says that the radiator usually cools better if the front air dam is removed. Technician B says that when a condenser has a leak it can be replied easily with epoxy. Who is correct?

  1. Neither Technician A nor B
  2. Technician B
  3. Both Technician A and B
  4. Technician A

 

  1. two technicians are discussing retrofitting CFC-12 systes to HFC-134a standards. Technician A says that the process doesn’t take long but that mineral oil must be added before the retrofit is complete. Technician B says that 50 ounces of CFC-12 should be replaced with 50 ounces of HFC-134a. Who is correct?
  2. Neither Technician A nor B
  3. Technician B
  4. Both Technician A and B
  5. Technician A

 

  1. two technicians are discussing refrigerant removal. Technician A says that all refrigerant must be captured. Technician B says that you can vent refrigerant into the atmosphere as long as it contains moisture. Who is correct?
  2. Neither Technician A nor B
  3. Technician B
  4. Both Technician A and B
  5. Technician A
  6. Technician A says that theradiator usually cools better if the front air is removed. Technician B says that when a condenser has a leak it can be repaired easily with epoxy. Who is correct?

 Technician a

Technician B

neither

 

Technician A says that in a fully charged orifice-tube system, the accumulator temperature will be higher than the orifice tube temperature. Technician B says that in a properly operating air conditioning system, the inlet to the compressor should be cool and outlet from the compressor hot.Who is correct?

  1. Neither Technician A nor B
  2. Technician B
  3. Both Technician A and B
  4. Technician A

 

After treating the expansion valve with a blast of CO2 from a fire extinguisher, you’ve determined that the valve is defective. What part of the test led you to this conclusion?

Air gap

 

 

Airflow through a typical HAC system is being discussed. Technician A says that the temperature is controlled by blending airflow through the evaporator and heater core. Technician B says that outside air is used in all heating and cooling positions. Who is correct

 

 

A blue compressor clutch indicates that it’s been slipping due to too

Little air gap

Much heat

Little belt tension

Much refrigerant

 

When replacing compressor clutch, what’s the critical measurement?

 

  1. Refrigerant
  2. air gap
  3. pressure

During a retrofit, the replacement R-134a charge should be than the specified R-12 charge

  1. 10-20% more
  2. 10-20 % less
  3. 20-30 % more
  4. 20-30 less