4th Class Power Engineering Part B
Unit 9 - Refrigeration Exam Questions
& Answers (Grade A+)
Miscibility -
correct answer ✅The ability of a refrigerant to be dissolved into oil
and vice versa is called
Ammonia -
correct answer ✅A refrigerant in the "B" Group that is used more
than others in its group in refrigeration systems is
Net Refrigerating Effect -
correct answer ✅The actual amount of heat absorbed from the
refrigerated medium by a mass unit of refrigerant in changing from
a liquid at a given condensing pressure and temperature to a gas at
a given evaporating pressure and temperature is called the
High-side Pressure and Temp. Fact -
correct answer ✅The condensing temperature of the vapour must
be higher than the temperature of the medium used in the
condenser
B3 -
correct answer ✅The refrigerant R-1140 belongs to the following
group
,4th Class Power Engineering Part B
Unit 9 - Refrigeration Exam Questions
& Answers (Grade A+)
30 C -
correct answer ✅In the standard refrigeration cycle, condensation
takes place at a temperature of
Temperature is increased -
correct answer ✅Refrigerant mediums will evaporate when the
Low-toxic -
correct answer ✅Group "A" refrigerants as found in the current
code are
Miscibility -
correct answer ✅What is not related to the thermodynamic
properties of heat?
Refrigerant Identification -
correct answer ✅Done by Chemical formula, Trade name, ASHRAE
designation, Chemical name
,4th Class Power Engineering Part B
Unit 9 - Refrigeration Exam Questions
& Answers (Grade A+)
Saturation Temperature -
correct answer ✅Superheated refrigerant is refrigerant at
saturation pressure, whose temperature is above the
Ideal Refrigerant -
correct answer ✅Has low boiling point at atmospheric pressure,
low condensing pressure, and non-corrosive action on metals
Gain of latent heat -
correct answer ✅A liquid evaporating is an example of a
Boiling Point -
correct answer ✅The saturation temperature is the same as the
High Toxicity -
correct answer ✅What characteristic is common in all of the group
B refrigerants
CSA B52 -
correct answer ✅Classifies refrigerants into groups
, 4th Class Power Engineering Part B
Unit 9 - Refrigeration Exam Questions
& Answers (Grade A+)
Ammonia -
correct answer ✅A refrigerant that is not miscible with refrigerant
lubricating oil
335 kJ per kg -
correct answer ✅The latent heat of fusion of ice is
High Latent Heat Capacity -
correct answer ✅A desirable quality of a refrigerant
Oxidization -
correct answer ✅What is NOT a physical property of refrigerants
Evaporator -
correct answer ✅In the vapor compression type of refrigeration
system, the liquid refrigerant is changed to a gas in the
Light in Weight -
correct answer ✅What is NOT a requirement for an ideal
refrigerant
Unit 9 - Refrigeration Exam Questions
& Answers (Grade A+)
Miscibility -
correct answer ✅The ability of a refrigerant to be dissolved into oil
and vice versa is called
Ammonia -
correct answer ✅A refrigerant in the "B" Group that is used more
than others in its group in refrigeration systems is
Net Refrigerating Effect -
correct answer ✅The actual amount of heat absorbed from the
refrigerated medium by a mass unit of refrigerant in changing from
a liquid at a given condensing pressure and temperature to a gas at
a given evaporating pressure and temperature is called the
High-side Pressure and Temp. Fact -
correct answer ✅The condensing temperature of the vapour must
be higher than the temperature of the medium used in the
condenser
B3 -
correct answer ✅The refrigerant R-1140 belongs to the following
group
,4th Class Power Engineering Part B
Unit 9 - Refrigeration Exam Questions
& Answers (Grade A+)
30 C -
correct answer ✅In the standard refrigeration cycle, condensation
takes place at a temperature of
Temperature is increased -
correct answer ✅Refrigerant mediums will evaporate when the
Low-toxic -
correct answer ✅Group "A" refrigerants as found in the current
code are
Miscibility -
correct answer ✅What is not related to the thermodynamic
properties of heat?
Refrigerant Identification -
correct answer ✅Done by Chemical formula, Trade name, ASHRAE
designation, Chemical name
,4th Class Power Engineering Part B
Unit 9 - Refrigeration Exam Questions
& Answers (Grade A+)
Saturation Temperature -
correct answer ✅Superheated refrigerant is refrigerant at
saturation pressure, whose temperature is above the
Ideal Refrigerant -
correct answer ✅Has low boiling point at atmospheric pressure,
low condensing pressure, and non-corrosive action on metals
Gain of latent heat -
correct answer ✅A liquid evaporating is an example of a
Boiling Point -
correct answer ✅The saturation temperature is the same as the
High Toxicity -
correct answer ✅What characteristic is common in all of the group
B refrigerants
CSA B52 -
correct answer ✅Classifies refrigerants into groups
, 4th Class Power Engineering Part B
Unit 9 - Refrigeration Exam Questions
& Answers (Grade A+)
Ammonia -
correct answer ✅A refrigerant that is not miscible with refrigerant
lubricating oil
335 kJ per kg -
correct answer ✅The latent heat of fusion of ice is
High Latent Heat Capacity -
correct answer ✅A desirable quality of a refrigerant
Oxidization -
correct answer ✅What is NOT a physical property of refrigerants
Evaporator -
correct answer ✅In the vapor compression type of refrigeration
system, the liquid refrigerant is changed to a gas in the
Light in Weight -
correct answer ✅What is NOT a requirement for an ideal
refrigerant
