Chapter 51 Fundamentals of HVAC

The evaporator would most likely be located ______________.

• in the cab of the truck

• in front of the radiator

• in the engine compartment

• before the receiver-drier

A/C systems operate by moving _________.

• heat through convection

• cold air

• coolant

• heat through conduction

Air conditioning also removes ________ from the cab.

• mold

• moisture or humidity

• foul odors

• airborne particles

An accumulator must be installed on a ___________ system.

• FOT (fixed orifice tube)

• TXV (thermal expansion valve)

• constant run clutch

• scroll compressor

All of the following are true related to accumulators EXCEPT?

• they contain a desiccant filter

• they help trap unwanted liquid

• they contain a low pressure switch

• they are located before the evaporator

All of the following deal with moisture EXCEPT?

• the condenser

• the reciever-drier

• the accumulator

• the evaporator

A TXV system will use a _____________.

• receiver-drier

• orifice tube

• accumulator

• cycling clutch

A TXV has all of the following EXCEPT?

• variable metering

• temperature sensing

• a filter screen

• an expanding gas

All of the following are benefits of an FOT EXCEPT?

• performance

• cost

• easy to change

• has filtering ability

Which of the following would most likely be a binary switch function?

• high pressure relief and cooling fan control

• low pressure cut out and low oil level

• multiple blower motor speeds

• multiple cooling fan speeds