HAC101 Week 6 Quiz Expansion Valves

The low- pressure cycling switch will remain open until the pressure rises on the low side of the A/C system to around:

Select one:

• 26 psi.

• 36 psi.

• 46 psi.

• 56 psi.

The job of the accumulator is to make sure that liquid refrigerant does not enter the:

Select one:

• compressor.

• condenser.

• evaporator.

• expansion valve.

The ________ acts as a low-pressure safety switch for the air-conditioning system.

Select one:

• Accumulator

• Fixed orifice tube

• High-pressure cycling switch

• Low-pressure cycling switch

The receiver filter drier is constructed with a mesh and ________ media.

Select one:

• Paper filter

• Cloth filter

• Magnetic filter

• None of the answers listed

_______ type automotive air-conditioning systems use a receiver filter drier to ensure that a pure liquid refrigerant is delivered to the restriction.

Select one:

• Fixed orifice tube (FOT)

• Thermal expansion valve (TXV)

• Low-pressure cycling (LPC)

• High-pressure cycling (HPC)

In a fixed orifice tube A/C system, the low-pressure cycling switch is typically installed on the low pressure line or on the:

Select one:

• accumulator.

• compressor.

• condenser.

• receiver/drier.

Technician A states that when removing the thermal cycle switch, mark the depth of the old one before removal. Technician B states that the thermal cycle switch is opened and closed by the pressure of the liquid refrigerant contained in the receiver filter drier. Who is correct?

Select one:

• Technician A

• Technician B

• Both Technician A and Technician B

• Neither Technician A nor Technician B

In the receiver filter drier, the siphon tube extends to the bottom of the RFD, allowing it to siphon pure _______ only.

Select one:

• Gas

• Lubricant

• Liquid

• None of the answers listed

It is important not to ________ because the storage capacity of the RFD will be lost and pressure will tend to rise very quickly in the high side.

Select one:

• Undercharge the A/C system

• Overcharge the A/C system

• Replace the RFD

• None of the answers listed

On a refrigerant with a thermal expansion valve, the temperature at the evaporator outlet regulates the pressure in the bulb.

Select one:

• True

• False