WorksheetsACR-110 CH 15 Test
Total questions: 9
Worksheet time: 5mins
There are two forces working together to try to close the TXV. What are these forces?
Equalizer and spring pressure
Suction bulb and equalizer pressure
Suction bulb, equalizer and spring pressure all work together to close the expansion valve,
Sensing bulb and spring pressure
In order to improve the performance of the heat/defrost mode, which component allows hot gas to enter the receiver tank?
Condenser pressure bypass.
Accumulator bypass valve.
Condenser check valve.
Bypass check valve.
What is the purpose of the discharge check valve on a solenoid control system?
To prevent liquid refrigerant from migrating from the condenser to the compressor in the off cycle
To trap refrigerant in the receiver
To prevent liquid refrigerant from flowing from the receiver to the hot gas line.
To prevent refrigerant from flowing into the evaporator.
In what position must the manual liquid line shutoff or (king valve) be to stop the flow of refrigerant on a unit with a solenoid control system?
Back seated
Front seated
Mid seated
Removed
The purpose of the TXV is to meter refrigerant into the evaporator in order to maintain a constant _____________ of the refrigerant at the evaporator outlet.
superheat
pressure
subcooling
flow
If the discharge temperature should exceed safe limits on a solenoid control refrigeration system the ______________ will open to allow a small amount of liquid refrigerant into the suction line.
the TXV
SV3
fusible plug
quench valve
The state of the refrigerant returning to the compressor through the suction vibrasorber is a low-pressure low-temperature _______________.
subcooled liquid
subcooled vapor
superheated vapor
superheated liquid
When the solenoid control system is in the heat/defrost mode the hot gas line delivers high-temperature, high-pressure _______________ to the evaporator.
superheated liquid
superheated vapor
subcooled vapor
subcooled liquid
What is the only difference between the heat and defrost modes of operation?
Air is not circulated over the load in defrost mode.
Defrost mode can only be used when ambient temperature is greater than box temperature.
