HAC101 Week 9 Quiz Climate Control

Transducers are electronic devices that convert:

Select one:

• one form of energy into another.

• voltage into amperage.

• hot air into cool air.

• high pressure to low pressure.

A sun load sensor is a:

Select one:

• thermistor.

• resistor.

• photodiode.

• potentiometer.

Technician A says that the sun load sensor monitors the temperature that the passengers feel as a result of the sun's rays. Technician B says that the sun load sensor is a thermistor. Who is correct?

Select one:

• Technician A

• Technician B

• Both Technician A and Technician B

• Neither Technician A nor Technician B

A heat sensing resistor that changes its value as its temperature changes is known as a:

Select one:

• Potentiometer.

• Rheostat.

• Thermistor.

• Thermostat.

The ________ is located in the airstream where the air leaves the evaporator and signals to the climate control system's ECU the temperature of the air.

Select one:

• Evaporator temperature sensor

• Engine coolant temperature sensor

• Air-conditioning pressure sensor

• Sun load sensor

The ECU will usually not allow the air-conditioning compressor to turn on if the ambient air temperature is below _____.

Select one:

• 50°F

• 40°F

• 45°F

• 60°F

If the evaporator temperature drops too low, the moisture will freeze on the evaporator and block airflow through the fins.

Select one:

• True

• False

The HVAC ECU system needs to know all of the following EXCEPT:

Select one:

• the temperature of the ambient air.

• the cabin air temperature.

• whether the vehicle is in bright sunlight.

• the temperature of the heater core.

In the automotive climate control system, the ________ measures the temperature of the outside air.

Select one:

• Cabin air temperature sensor

• Ambient air temperature sensor

• Engine coolant temperature sensor

• Sun load sensor

Which of the following sensors signals to the ECU the temperature of the coolant which flows through the heater core?

Select one:

• Ambient air temperature sensor

• Cabin air temperature sensor

• Engine coolant temperature sensor

• Sun load, or solar, sensor