©THEBRIGHT EXAM SOLUTIONS
10/30/2024 11:32 PM
Power Engineering 4th Class - B9 Exam
Questions And Answers 100% Pass
C - answer✔Which of the following is NOT a common type of refrigeration condenser?
a. Shell and tube
b. Shell and coil
c. Flooded
d. Air-cooled
a, b, and d - answer✔Which of the following is a common type of refrigeration condenser?
a. Shell and tube
b. Shell and coil
c. Flooded
d. Air-cooled
c - answer✔Which of the following statements about the shell and tube evaporator is FALSE?
a. Refrigerant vapour is drawn from the evaporator by the compressor.
b. In the flooded chiller, the refrigerant is contained in the shell, and surrounds the tubes.
c. In a direct expansion chiller, the brine circulates through the tubes.
d. A shell and tube evaporator is also called a chiller
, ©THEBRIGHT EXAM SOLUTIONS
10/30/2024 11:32 PM
a, b, and d - answer✔Which of the following statements about the shell and tube evaporator is
TRUE?
a. Refrigerant vapour is drawn from the evaporator by the compressor.
b. In the flooded chiller, the refrigerant is contained in the shell, and surrounds the tubes.
c. In a direct expansion chiller, the brine circulates through the tubes.
d. A shell and tube evaporator is also called a chiller
b - answer✔The low oil pressure cut-off switches of a mechanical refrigeration system
a. keep the oil from gelling at low pressure
b. shut down the compressor when the oil pressure drops below the minimum required value
c. prevent compressor start-up if the oil heater fails
d. keep the compressor oil pressure at a level where the oil will not freeze
d - answer✔One function of vibration absorbers is to:
a. Align piping
b. Insulate piping and make the system more efficient
c. Allow the load on the system to increase dramatically without straining the components in
the system
d. Lower noise levels
d - answer✔Which of the following statements about refrigeration pressure gauges is TRUE?
a. Permanently installed pressure gauges shall be constructed for at least 1.5 times the high
side design pressure.
b. Only one pressure gauge is normally installed on a system.
, ©THEBRIGHT EXAM SOLUTIONS
10/30/2024 11:32 PM
c. The CSA B52 Code requires permanently installed pressure gauges on all refrigeration
systems.
d. Refrigeration pressure gauges can indicate saturation temperatures in a system.
d - answer✔The saturation temperature of a refrigerant is the same as its:
a. Fire point
b. Saturation pressure
c. Freezing point
d. Boiling point
c - answer✔What must be located outside a Class T machinery room?
a. Spare flashlights
b. Disposable coveralls
c. Machinery shut off switch
d. Light switches
a - answer✔The major building occupancy classes include all of the following, except:
a. Educational
b. Industrial
c. Commercial
d. Institutional
** (make more like this) b - answer✔Group A refrigerants:
a. are natural refrigerants
b. have low toxicity
10/30/2024 11:32 PM
Power Engineering 4th Class - B9 Exam
Questions And Answers 100% Pass
C - answer✔Which of the following is NOT a common type of refrigeration condenser?
a. Shell and tube
b. Shell and coil
c. Flooded
d. Air-cooled
a, b, and d - answer✔Which of the following is a common type of refrigeration condenser?
a. Shell and tube
b. Shell and coil
c. Flooded
d. Air-cooled
c - answer✔Which of the following statements about the shell and tube evaporator is FALSE?
a. Refrigerant vapour is drawn from the evaporator by the compressor.
b. In the flooded chiller, the refrigerant is contained in the shell, and surrounds the tubes.
c. In a direct expansion chiller, the brine circulates through the tubes.
d. A shell and tube evaporator is also called a chiller
, ©THEBRIGHT EXAM SOLUTIONS
10/30/2024 11:32 PM
a, b, and d - answer✔Which of the following statements about the shell and tube evaporator is
TRUE?
a. Refrigerant vapour is drawn from the evaporator by the compressor.
b. In the flooded chiller, the refrigerant is contained in the shell, and surrounds the tubes.
c. In a direct expansion chiller, the brine circulates through the tubes.
d. A shell and tube evaporator is also called a chiller
b - answer✔The low oil pressure cut-off switches of a mechanical refrigeration system
a. keep the oil from gelling at low pressure
b. shut down the compressor when the oil pressure drops below the minimum required value
c. prevent compressor start-up if the oil heater fails
d. keep the compressor oil pressure at a level where the oil will not freeze
d - answer✔One function of vibration absorbers is to:
a. Align piping
b. Insulate piping and make the system more efficient
c. Allow the load on the system to increase dramatically without straining the components in
the system
d. Lower noise levels
d - answer✔Which of the following statements about refrigeration pressure gauges is TRUE?
a. Permanently installed pressure gauges shall be constructed for at least 1.5 times the high
side design pressure.
b. Only one pressure gauge is normally installed on a system.
, ©THEBRIGHT EXAM SOLUTIONS
10/30/2024 11:32 PM
c. The CSA B52 Code requires permanently installed pressure gauges on all refrigeration
systems.
d. Refrigeration pressure gauges can indicate saturation temperatures in a system.
d - answer✔The saturation temperature of a refrigerant is the same as its:
a. Fire point
b. Saturation pressure
c. Freezing point
d. Boiling point
c - answer✔What must be located outside a Class T machinery room?
a. Spare flashlights
b. Disposable coveralls
c. Machinery shut off switch
d. Light switches
a - answer✔The major building occupancy classes include all of the following, except:
a. Educational
b. Industrial
c. Commercial
d. Institutional
** (make more like this) b - answer✔Group A refrigerants:
a. are natural refrigerants
b. have low toxicity
