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
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
All of these are steps to an AC performance test except sec 2.1
The outlet line from the evaporator should be sec 2.1
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
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
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
The photograph above shows sec 2.2
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
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
In the photograph above, the technician is sec 2.2
when the condenser airflow is restricted
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?
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?
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?
An air conditioning performance check requires the use of a
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?
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?
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?
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
Little belt tension
When replacing compressor clutch, what’s the critical measurement?
During a retrofit, the replacement R-134a charge should be than the specified R-12 charge