Power Engineering - 4B9 Practice Questions With Complete
Solutions
---------- requires owners to provide employees with a written
emergency plan.
a. IIAR
b. CSA B52
c. CEPA
d. ASME B31.5
e. OSHA Correct Answers b. CSA B52
"E2" regulation for Ammonia refrigeration is applicable to the
refrigerant amount of:
a. 1000 kg
b. 300 kg
c. 4500 kg and more
d. 50 kg
e. 2500 kg Correct Answers c. 4500 kg and more
A buildup of oil in condenser increases ------- transfer and
increases ------- consumption of compressor. Correct Answers
heat, power
A chemical dot placed under the lens of a sight glass that is
exposed to liquid refrigerant monitors
a. Liquid flow
b. Refrigerant levels
c. The presence of moisture in the refrigerant
,d. Vapour flow Correct Answers c. The presence of moisture in
the refrigerant
A compression refrigeration system can be divided into two
sections: a high pressure section containing the head pressure
and a low pressure section carrying the _____ pressure:
a. Discharge
b. Saturation
c. Absolute
d. Suction Correct Answers d. Suction
A compression refrigeration system may be pumped down for
which of the following reasons?
a. To perform maintenance on the low-pressure side of the
system.
b. To perform maintenance at the discharge of the compressor.
c. To perform maintenance on the high-pressure side of the
system.
d. To perform maintenance on the condenser. Correct Answers
c. To perform maintenance on the low-pressure side of the
system.
A controlled amount of high pressure, high temperature liquid
refrigerant:
a. Occurs in isentropic systems.
b. Passes through the regulating valve to the evaporator.
c. Refrigerant flow is not controlled.
d. Passes through the regulating valve to the liquid receiver.
,e. Passes through the compressor to the condenser. Correct
Answers d. Passes through the regulating valve to the
evaporator.
A direct expansion type evaporator that has more than one
refrigerant circuit requires __________ to provide even
refrigerant flow in each circuit.
a. An expansion valve
b. A distributor
c. A purge valve
d. A backpressure regulator Correct Answers b. A distributor
A liquid evaporating is an example of a:
a. Gain of sensible heat
b. Loss of latent heat
c. Gain of latent heat
d. Loss of sensible heat
e. No change in heat content Correct Answers c. Gain of latent
heat
A liquid trap located in the suction line before a refrigeration
compressor, which evaporates liquid refrigerant and returns it to
the compressor as a gas, is called:
a. An oil separator
b. A strainer-drier
c. A distributor
d. An accumulator Correct Answers d. An accumulator
, A pressure relief device on a refrigeration system shall have
sufficient capacity to prevent the pressure in the pressure vessel
from rising more than _____ above the setting of the pressure
relief device.
a. 10%
b. 150%
c. 103 kPa
d. 25% Correct Answers a. 10%
A refrigerant in the "B" Group that is used more than others in
its group in refrigeration systems is:
a. Butane
b. Methane
c. Ethane
d. Propane
e. Ammonia Correct Answers e. Ammonia
A refrigeration environmental emergency is defined by
-------------.
a. IIAR
b. CSA B52
c. CEPA
d. ASME B31.5
e. OSHA Correct Answers c. CEPA
A running vacuum pump connected to a refrigeration tank may:
1. Lower the tank pressure
2. Raise the tank pressure
Solutions
---------- requires owners to provide employees with a written
emergency plan.
a. IIAR
b. CSA B52
c. CEPA
d. ASME B31.5
e. OSHA Correct Answers b. CSA B52
"E2" regulation for Ammonia refrigeration is applicable to the
refrigerant amount of:
a. 1000 kg
b. 300 kg
c. 4500 kg and more
d. 50 kg
e. 2500 kg Correct Answers c. 4500 kg and more
A buildup of oil in condenser increases ------- transfer and
increases ------- consumption of compressor. Correct Answers
heat, power
A chemical dot placed under the lens of a sight glass that is
exposed to liquid refrigerant monitors
a. Liquid flow
b. Refrigerant levels
c. The presence of moisture in the refrigerant
,d. Vapour flow Correct Answers c. The presence of moisture in
the refrigerant
A compression refrigeration system can be divided into two
sections: a high pressure section containing the head pressure
and a low pressure section carrying the _____ pressure:
a. Discharge
b. Saturation
c. Absolute
d. Suction Correct Answers d. Suction
A compression refrigeration system may be pumped down for
which of the following reasons?
a. To perform maintenance on the low-pressure side of the
system.
b. To perform maintenance at the discharge of the compressor.
c. To perform maintenance on the high-pressure side of the
system.
d. To perform maintenance on the condenser. Correct Answers
c. To perform maintenance on the low-pressure side of the
system.
A controlled amount of high pressure, high temperature liquid
refrigerant:
a. Occurs in isentropic systems.
b. Passes through the regulating valve to the evaporator.
c. Refrigerant flow is not controlled.
d. Passes through the regulating valve to the liquid receiver.
,e. Passes through the compressor to the condenser. Correct
Answers d. Passes through the regulating valve to the
evaporator.
A direct expansion type evaporator that has more than one
refrigerant circuit requires __________ to provide even
refrigerant flow in each circuit.
a. An expansion valve
b. A distributor
c. A purge valve
d. A backpressure regulator Correct Answers b. A distributor
A liquid evaporating is an example of a:
a. Gain of sensible heat
b. Loss of latent heat
c. Gain of latent heat
d. Loss of sensible heat
e. No change in heat content Correct Answers c. Gain of latent
heat
A liquid trap located in the suction line before a refrigeration
compressor, which evaporates liquid refrigerant and returns it to
the compressor as a gas, is called:
a. An oil separator
b. A strainer-drier
c. A distributor
d. An accumulator Correct Answers d. An accumulator
, A pressure relief device on a refrigeration system shall have
sufficient capacity to prevent the pressure in the pressure vessel
from rising more than _____ above the setting of the pressure
relief device.
a. 10%
b. 150%
c. 103 kPa
d. 25% Correct Answers a. 10%
A refrigerant in the "B" Group that is used more than others in
its group in refrigeration systems is:
a. Butane
b. Methane
c. Ethane
d. Propane
e. Ammonia Correct Answers e. Ammonia
A refrigeration environmental emergency is defined by
-------------.
a. IIAR
b. CSA B52
c. CEPA
d. ASME B31.5
e. OSHA Correct Answers c. CEPA
A running vacuum pump connected to a refrigeration tank may:
1. Lower the tank pressure
2. Raise the tank pressure
