Test Bank For Modern Refrigeration and Air
Conditioning 21st Edition by Andrew D. Althouse, Carl
H. Turnquist, Alfred F. Bracciano, Daniel C. Bracciano,
Gloria M. Bracciano
How are refrigerant leaks detected? - ANSWER By use of an electronic tester or
by the soapsuds test method
Can refrigerant gases ever be mixed? - ANSWER no
Which Naval Ship Technical Manual (NSTM) chapter will give you
specific information on the operation and maintenance of refrigeration systems? -
ANSWER 516
Which type of lube oil system is found on high speed refrigerant compressors? -
ANSWER Force-feed lubricating
Which speed do high speed centrifugal refrigerant compressors operate at? -
ANSWER 1,500 RPMs
Which type of material is refrigerant piping made out of? - ANSWER 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? - ANSWER 4-12F
which detrimental effect will occur if the Thermostatic Expansion Valve (TXV) is
misadjusted and gives an excessive temperature range? - ANSWER 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? - ANSWER Frosting Back
Which system discharge pressure is the refrigerant water regulating valve set to
maintain? - ANSWER 125 psig
What is the first indication of a refrigerant shaft seal failure? - ANSWER Oil
leakage
What should never be done when installing a new refrigerant shaft seal? -
ANSWER 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? - ANSWER 670
, Which manner must refrigerant bottles always be stored in? - ANSWER In a cool,
dry place, in an upright position firmly anchored
What is the maximum temperature that refrigerant bottles should be exposed
to? - ANSWER 130F
Why are refrigerants considered to be deadly? - ANSWER Halocarbons
Which series contains safety precautions for forces afloat when dealing with
refrigerants? - ANSWER OPNAVINST 5100.19
Which measurement is the capacity of a refrigeration plant always expressed in? -
ANSWER Tons of refrigerant
The refrigerant liquid strainer is designed to protect what? - ANSWER The
solenoid valves and TXV
Which type of switch automatically stops a refrigerant compressor when a failure of
circulating water supply occurs? - ANSWER Water failure
Which type of refrigerant is replacing R-ll and R-12 systems? - ANSWER R-134
What is the allowable monthly leakage rate of the total refrigerant charge minus the
reported accidental or unintentional releases? - ANSWER 35%
How often is testing of refrigerant systems for leaks accomplished IAW PMS? -
ANSWER Semi-annually
What is not permitted in the vicinity of performing recovery of refrigerant? -
ANSWER Hot work
Refrigerant usage logs must be kept when the refrigeration plant holds how many or
more pounds of refrigerant? - ANSWER 50
How often at a minimum must refrigerant usage logs be reviewed? - ANSWER
Monthly
What controls the capacity of a refrigerant compressor? - ANSWER Cylinder
unloading and loading
Where is the compressor capacity control valve located? - ANSWER Compressor
crankcase cover
what actuates the compressor capacity control valve? - ANSWER Oil pressure
Which pressure is the compressor pumped down to when testing the compressor
discharge valves for proper operation? - ANSWER 2 psig
Conditioning 21st Edition by Andrew D. Althouse, Carl
H. Turnquist, Alfred F. Bracciano, Daniel C. Bracciano,
Gloria M. Bracciano
How are refrigerant leaks detected? - ANSWER By use of an electronic tester or
by the soapsuds test method
Can refrigerant gases ever be mixed? - ANSWER no
Which Naval Ship Technical Manual (NSTM) chapter will give you
specific information on the operation and maintenance of refrigeration systems? -
ANSWER 516
Which type of lube oil system is found on high speed refrigerant compressors? -
ANSWER Force-feed lubricating
Which speed do high speed centrifugal refrigerant compressors operate at? -
ANSWER 1,500 RPMs
Which type of material is refrigerant piping made out of? - ANSWER 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? - ANSWER 4-12F
which detrimental effect will occur if the Thermostatic Expansion Valve (TXV) is
misadjusted and gives an excessive temperature range? - ANSWER 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? - ANSWER Frosting Back
Which system discharge pressure is the refrigerant water regulating valve set to
maintain? - ANSWER 125 psig
What is the first indication of a refrigerant shaft seal failure? - ANSWER Oil
leakage
What should never be done when installing a new refrigerant shaft seal? -
ANSWER 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? - ANSWER 670
, Which manner must refrigerant bottles always be stored in? - ANSWER In a cool,
dry place, in an upright position firmly anchored
What is the maximum temperature that refrigerant bottles should be exposed
to? - ANSWER 130F
Why are refrigerants considered to be deadly? - ANSWER Halocarbons
Which series contains safety precautions for forces afloat when dealing with
refrigerants? - ANSWER OPNAVINST 5100.19
Which measurement is the capacity of a refrigeration plant always expressed in? -
ANSWER Tons of refrigerant
The refrigerant liquid strainer is designed to protect what? - ANSWER The
solenoid valves and TXV
Which type of switch automatically stops a refrigerant compressor when a failure of
circulating water supply occurs? - ANSWER Water failure
Which type of refrigerant is replacing R-ll and R-12 systems? - ANSWER R-134
What is the allowable monthly leakage rate of the total refrigerant charge minus the
reported accidental or unintentional releases? - ANSWER 35%
How often is testing of refrigerant systems for leaks accomplished IAW PMS? -
ANSWER Semi-annually
What is not permitted in the vicinity of performing recovery of refrigerant? -
ANSWER Hot work
Refrigerant usage logs must be kept when the refrigeration plant holds how many or
more pounds of refrigerant? - ANSWER 50
How often at a minimum must refrigerant usage logs be reviewed? - ANSWER
Monthly
What controls the capacity of a refrigerant compressor? - ANSWER Cylinder
unloading and loading
Where is the compressor capacity control valve located? - ANSWER Compressor
crankcase cover
what actuates the compressor capacity control valve? - ANSWER Oil pressure
Which pressure is the compressor pumped down to when testing the compressor
discharge valves for proper operation? - ANSWER 2 psig
