MA Refrigeration License Exam Questions and
Answers Latest Version Top Rated A+
Question 1
On a TXV, the purpose of an external equalizer is to?
Correct Answer
Compensate for pressure drop across the evaporator coil
Question 2
and its alloys are suitable for use with ammonia systems
Correct Answer
Aluminium
Question 3
Heat transferred by conduction from one body to another is done
Correct Answer
Solids
Page 1 of 26
,Question 4
The discharge relief valve is located
Correct Answer
Between compressor and stop valve
Question 5
What is a high-side float?
Correct Answer
Located in the liquid line entering the evaporator, so when the refrigerant level is higher in the liquid line than the
evaporator, the float rises to allow more refrigerant flow into the evaporator
Question 6
The color code of a tank of ammonia is
Correct Answer
Silver
Question 7
Emergency shutdown procedures, including precautions to be observed in case of a breakdown or leak over 55 lbs of
refrigerant charge, shall be displayed on a conspicuous card located as near as possible to the
Correct Answer
Compressor
Page 2 of 26
, Question 8
To determine the pump size needed for an open cooling tower system, the following must be known,
Correct Answer
GPM and friction head
Question 9
If a low-pressure chiller has a low-side leak, which of the following will most likely result?
Correct Answer
High suction pressure and High discharge pressure
Question 10
What type of refrigerants are NOT flammable?
Correct Answer
CHC
HFC
HCFC
Question 11
The actual expansion curve of compressor follows most nearly which one of the following
Correct Answer
Adiabatic
Page 3 of 26
Answers Latest Version Top Rated A+
Question 1
On a TXV, the purpose of an external equalizer is to?
Correct Answer
Compensate for pressure drop across the evaporator coil
Question 2
and its alloys are suitable for use with ammonia systems
Correct Answer
Aluminium
Question 3
Heat transferred by conduction from one body to another is done
Correct Answer
Solids
Page 1 of 26
,Question 4
The discharge relief valve is located
Correct Answer
Between compressor and stop valve
Question 5
What is a high-side float?
Correct Answer
Located in the liquid line entering the evaporator, so when the refrigerant level is higher in the liquid line than the
evaporator, the float rises to allow more refrigerant flow into the evaporator
Question 6
The color code of a tank of ammonia is
Correct Answer
Silver
Question 7
Emergency shutdown procedures, including precautions to be observed in case of a breakdown or leak over 55 lbs of
refrigerant charge, shall be displayed on a conspicuous card located as near as possible to the
Correct Answer
Compressor
Page 2 of 26
, Question 8
To determine the pump size needed for an open cooling tower system, the following must be known,
Correct Answer
GPM and friction head
Question 9
If a low-pressure chiller has a low-side leak, which of the following will most likely result?
Correct Answer
High suction pressure and High discharge pressure
Question 10
What type of refrigerants are NOT flammable?
Correct Answer
CHC
HFC
HCFC
Question 11
The actual expansion curve of compressor follows most nearly which one of the following
Correct Answer
Adiabatic
Page 3 of 26
