Air Conditioning and Refrigeration Test Bank Solution Manual Already Passed
How are refrigerant leaks detected? - Answers By use of an electronic tester or by the soapsuds test
method
Can refrigerant gases ever be mixed? - Answers no
Which Naval Ship Technical Manual (NSTM) chapter will give you
specific information on the operation and maintenance of refrigeration systems? - Answers 516
Which type of lube oil system is found on high speed refrigerant compressors? - Answers Force-feed
lubricating
Which speed do high speed centrifugal refrigerant compressors operate at? - Answers 1,500 RPMs
Which type of material is refrigerant piping made out of? - Answers ACR seamless copper piping
Refrigerant Thermostatic Expansion Valves (TXV) are set to maintain a superheat range of how many
degrees at the cooling-coil outlet? - Answers 4-12F
which detrimental effect will occur if the Thermostatic Expansion Valve (TXV) is misadjusted and gives an
excessive temperature range? - Answers Cooling-coil will become starved and will operate at reduced
efficiency
Which term is defined as the appearance of frost on the suction line extending as far back as the
compressor? - Answers Frosting Back
Which system discharge pressure is the refrigerant water regulating valve set to maintain? - Answers
125 psig
What is the first indication of a refrigerant shaft seal failure? - Answers Oil leakage
What should never be done when installing a new refrigerant shaft seal? - Answers Handling seals with
your fingers, surgical gloves should be used for seal installation
Which Naval Ship Technical Manual (NS TM) chapter should be read before handling refrigerant bottles?
- Answers 670
Which manner must refrigerant bottles always be stored in? - Answers In a cool, dry place, in an upright
position firmly anchored
What is the maximum temperature that refrigerant bottles should be exposed
to? - Answers 130F
Why are refrigerants considered to be deadly? - Answers Halocarbons
, Which series contains safety precautions for forces afloat when dealing with refrigerants? - Answers
OPNAVINST 5100.19
Which measurement is the capacity of a refrigeration plant always expressed in? - Answers Tons of
refrigerant
The refrigerant liquid strainer is designed to protect what? - Answers The solenoid valves and TXV
Which type of switch automatically stops a refrigerant compressor when a failure of circulating water
supply occurs? - Answers Water failure
Which type of refrigerant is replacing R-ll and R-12 systems? - Answers R-134
What is the allowable monthly leakage rate of the total refrigerant charge minus the reported accidental
or unintentional releases? - Answers 35%
How often is testing of refrigerant systems for leaks accomplished IAW PMS? - Answers Semi-annually
What is not permitted in the vicinity of performing recovery of refrigerant? - Answers Hot work
Refrigerant usage logs must be kept when the refrigeration plant holds how many or more pounds of
refrigerant? - Answers 50
How often at a minimum must refrigerant usage logs be reviewed? - Answers Monthly
What controls the capacity of a refrigerant compressor? - Answers Cylinder unloading and loading
Where is the compressor capacity control valve located? - Answers Compressor crankcase cover
what actuates the compressor capacity control valve? - Answers Oil pressure
Which pressure is the compressor pumped down to when testing the compressor discharge valves for
proper operation? - Answers 2 psig
What is the problem if while conducting a compressor discharge valve test, the discharge pressure drops
at a rate in excess of 3 pounds a minute and the crankcase pressure rises? - Answers Compressor
discharge valve leakage
Compressor suction valves are working satisfactorily when checking them for proper operation if the
compressor can hold a minimum of how many inches of vacuum with the line stop valve shut? - Answers
20
Which Naval Ship Technical Manual (NSTM) chapter contains information on retubing refrigerant
condensers? - Answers 516
Under normal conditions, what percentage of the full refrigerant load should the refrigerant charge is
with the compressor stopped under normal conditions? - Answers 85%
How are refrigerant leaks detected? - Answers By use of an electronic tester or by the soapsuds test
method
Can refrigerant gases ever be mixed? - Answers no
Which Naval Ship Technical Manual (NSTM) chapter will give you
specific information on the operation and maintenance of refrigeration systems? - Answers 516
Which type of lube oil system is found on high speed refrigerant compressors? - Answers Force-feed
lubricating
Which speed do high speed centrifugal refrigerant compressors operate at? - Answers 1,500 RPMs
Which type of material is refrigerant piping made out of? - Answers ACR seamless copper piping
Refrigerant Thermostatic Expansion Valves (TXV) are set to maintain a superheat range of how many
degrees at the cooling-coil outlet? - Answers 4-12F
which detrimental effect will occur if the Thermostatic Expansion Valve (TXV) is misadjusted and gives an
excessive temperature range? - Answers Cooling-coil will become starved and will operate at reduced
efficiency
Which term is defined as the appearance of frost on the suction line extending as far back as the
compressor? - Answers Frosting Back
Which system discharge pressure is the refrigerant water regulating valve set to maintain? - Answers
125 psig
What is the first indication of a refrigerant shaft seal failure? - Answers Oil leakage
What should never be done when installing a new refrigerant shaft seal? - Answers Handling seals with
your fingers, surgical gloves should be used for seal installation
Which Naval Ship Technical Manual (NS TM) chapter should be read before handling refrigerant bottles?
- Answers 670
Which manner must refrigerant bottles always be stored in? - Answers In a cool, dry place, in an upright
position firmly anchored
What is the maximum temperature that refrigerant bottles should be exposed
to? - Answers 130F
Why are refrigerants considered to be deadly? - Answers Halocarbons
, Which series contains safety precautions for forces afloat when dealing with refrigerants? - Answers
OPNAVINST 5100.19
Which measurement is the capacity of a refrigeration plant always expressed in? - Answers Tons of
refrigerant
The refrigerant liquid strainer is designed to protect what? - Answers The solenoid valves and TXV
Which type of switch automatically stops a refrigerant compressor when a failure of circulating water
supply occurs? - Answers Water failure
Which type of refrigerant is replacing R-ll and R-12 systems? - Answers R-134
What is the allowable monthly leakage rate of the total refrigerant charge minus the reported accidental
or unintentional releases? - Answers 35%
How often is testing of refrigerant systems for leaks accomplished IAW PMS? - Answers Semi-annually
What is not permitted in the vicinity of performing recovery of refrigerant? - Answers Hot work
Refrigerant usage logs must be kept when the refrigeration plant holds how many or more pounds of
refrigerant? - Answers 50
How often at a minimum must refrigerant usage logs be reviewed? - Answers Monthly
What controls the capacity of a refrigerant compressor? - Answers Cylinder unloading and loading
Where is the compressor capacity control valve located? - Answers Compressor crankcase cover
what actuates the compressor capacity control valve? - Answers Oil pressure
Which pressure is the compressor pumped down to when testing the compressor discharge valves for
proper operation? - Answers 2 psig
What is the problem if while conducting a compressor discharge valve test, the discharge pressure drops
at a rate in excess of 3 pounds a minute and the crankcase pressure rises? - Answers Compressor
discharge valve leakage
Compressor suction valves are working satisfactorily when checking them for proper operation if the
compressor can hold a minimum of how many inches of vacuum with the line stop valve shut? - Answers
20
Which Naval Ship Technical Manual (NSTM) chapter contains information on retubing refrigerant
condensers? - Answers 516
Under normal conditions, what percentage of the full refrigerant load should the refrigerant charge is
with the compressor stopped under normal conditions? - Answers 85%
