ABSA-3B2- CHAPTER 11 Questions on
absa With Actual Answers.
Evaporator pressure regulator: A device that is used to maintain - Answer constant
evaporating pressure and temperature under varying loads
Filter/dryer: A component installed in the ______ which has two functions what are they -
Answer -liquid line
-absorb liquid contaminants
-provide filtration
Hot gas bypass valve: A modulating control valve that provides a metered flow of compressor
discharge gas to the ________. It uses - Answer -low side
-sensing line connected to the low side pressure
which component is installed upstream of the hot gas by pass valve - Answer evaporator
where is the sight glass located - Answer between the expansion valve and liquid line
solenoid valve
Control of the refrigerationcycle involves three seperate control loops what are they - Answer
-metering
-compressor
-condenser cooling water
The flow rate or evaporation rate must be maintained to match the - Answer refrigeration
load
___________ of the compressor means matching the flow rate through the compressor to the
refrigeration load - Answer capacity control
The function of the compressor is to - Answer draw refrigerant from the evaporator and
move it to the high side of the circuit
Condenser cooling water controls regulate the flow of water to the condenser and these
controls usually respond to the - Answer high side of the refrigerant circuit
, Refrigerant metering device can be classified as the following - Answer -Variable
-Fixed
Variable metering device can be further broken down into - Answer -Automatic expansion
valve
-Float valves
-manual expansion valve
Fixed metering device can be further broken up into - Answer -Cappilary tube
-fixed orifce plate
The automatic expansion valve is a _________ that maintains a constant presure within the
evaporator when the compressor is operating. This valve also - Answer -pressure controlled
valve
-closes when the compressor stops
A thermostatic expansion valve is designed to mainatin a specific amouny of what - Answer -
superheat at the outlet of the evaporator
In a thermostatic expansion valve the pressure of the refrigerant in the power element is the -
Answer force that opens the valve
In a thermostatic expansion valve the evaporator pressure that acts under the diaphragm due to
external equalizer connection and the force of the spring does what - Answer closes the
valve
"The important components of the thermostatic expansion valve are"
Capillary tube: Used to transmit what - Answer pressure between the feeler bulb and
bellows
"The important components of the thermostatic expansion valve are"
Power element: - Answer Valve actuating mechanism
"The important components of the thermostatic expansion valve are"
Bellows: Responds to pressure changes in the sensing line and does what - Answer converts
these changes into linear motion of the push rod
"The important components of the thermostatic expansion valve are"
absa With Actual Answers.
Evaporator pressure regulator: A device that is used to maintain - Answer constant
evaporating pressure and temperature under varying loads
Filter/dryer: A component installed in the ______ which has two functions what are they -
Answer -liquid line
-absorb liquid contaminants
-provide filtration
Hot gas bypass valve: A modulating control valve that provides a metered flow of compressor
discharge gas to the ________. It uses - Answer -low side
-sensing line connected to the low side pressure
which component is installed upstream of the hot gas by pass valve - Answer evaporator
where is the sight glass located - Answer between the expansion valve and liquid line
solenoid valve
Control of the refrigerationcycle involves three seperate control loops what are they - Answer
-metering
-compressor
-condenser cooling water
The flow rate or evaporation rate must be maintained to match the - Answer refrigeration
load
___________ of the compressor means matching the flow rate through the compressor to the
refrigeration load - Answer capacity control
The function of the compressor is to - Answer draw refrigerant from the evaporator and
move it to the high side of the circuit
Condenser cooling water controls regulate the flow of water to the condenser and these
controls usually respond to the - Answer high side of the refrigerant circuit
, Refrigerant metering device can be classified as the following - Answer -Variable
-Fixed
Variable metering device can be further broken down into - Answer -Automatic expansion
valve
-Float valves
-manual expansion valve
Fixed metering device can be further broken up into - Answer -Cappilary tube
-fixed orifce plate
The automatic expansion valve is a _________ that maintains a constant presure within the
evaporator when the compressor is operating. This valve also - Answer -pressure controlled
valve
-closes when the compressor stops
A thermostatic expansion valve is designed to mainatin a specific amouny of what - Answer -
superheat at the outlet of the evaporator
In a thermostatic expansion valve the pressure of the refrigerant in the power element is the -
Answer force that opens the valve
In a thermostatic expansion valve the evaporator pressure that acts under the diaphragm due to
external equalizer connection and the force of the spring does what - Answer closes the
valve
"The important components of the thermostatic expansion valve are"
Capillary tube: Used to transmit what - Answer pressure between the feeler bulb and
bellows
"The important components of the thermostatic expansion valve are"
Power element: - Answer Valve actuating mechanism
"The important components of the thermostatic expansion valve are"
Bellows: Responds to pressure changes in the sensing line and does what - Answer converts
these changes into linear motion of the push rod
"The important components of the thermostatic expansion valve are"
