HVAC Chapter 9

An evaporator is called a heat exchanger because_______.

• heat is absorbed to change liquid into a gas

• heat is absorbed to change a gas into a liquid

• heat is dissipated to change a liquid into a gas

• heat is dissipated to change a gas into a liquid

evaporator housing contain a drain with a ________ to prevent contaminants from entering the tube from the outside.

• rubber flap

• filter

• screen

• check valve

The sensing bulb on an expansion valve is located __________.

• on the inlet of the condenser

• on the outlet of the condenser

• on the inlet of the evaporator

• on the outlet of the evaporator

A high pressure switch cuts off the ________ if pressure becomes too high.

• compressor

• radiator fan

• blower fan

• condenser fan

Receiver driers store_________.

• condensed refrigerant and a small amount of vapor

• vaporized refrigerant and a small amount of condensed refrigerant

• contaminated refrigeration oil

• unwanted air and moisture

A receiver drier could contain all the following EXCEPT?

• moisture indicator

• sight glass

• high pressure switch

• low pressure cycling switch

An accumulator has all the following EXCEPT?

• U shaped tube

• desiccant bag

• high pressure switch

• oil return hole

All of the following cut off the compressor EXCEPT?

• high pressure switch

• low pressure switch

• trinary switch

• high speed relay

Which of the following is true concerning serpentine condensers?

• has one continuous tube

• has multiple tubes

• refrigerant passes through the condenser 3 to 4 times before exiting

• they are the largest type of condenser

Which of the following is NOT true about multiflow condensers?

• constructed of one continuous tube

• smallest type of condenser used

• has a small number of tubes for refrigerant flow

• refrigerant passes through the condenser 3 or 4 times before exiting