POWER ENGINEERING TECHNOLOGY 4B
REFRIGERATION Exam Questions and Answers
Latest Version Top Rated A+
Question>> 1
The purpose of a vacuum breaker used with steam heating coils is to:
a. prevent freezing caused by a vacuum or negative pressure in the steam coil
b. prevent negative air pressure in the conditioned space
c. ensure proper operation of the steam control valve
d. prevent flashing if the condensate within the steam coil
Answer>>
a
Question>> 2
The maximum temperature of the water in a gravity hot water system is:
a. 65 degrees celsius
b. 77 degrees celsius
c. 87 degrees celsius
Page 1 of 94
,d. 120 degrees celsius
Answer>>
b
Question>> 3
In a radiant heating system the maximum surface temperature of the walls is:
a. 20 degrees celsius
b. 38 degrees celsius
c. 45 degrees celsius
d. limited to 120 degrees celsius in accordance with ASME IV
Answer>>
b
Question>> 4
Refrigerant compressors:
a. must have intercoolers
b. could be the centrifugal type
c. use automotive style suction and discharge valves
d. have more cooling fins than air compressors
Answer>>
b
Page 2 of 94
,Question>> 5
Which of the following statements about lithium bromide absorption refrigeration systems
is FALSE?
a. lithium bromide solution has the ability to absorb water vapour readily
b. evacuating the system lowers the boiling point of water
c. as water vapour is absorbed by lithium bromide the pressure in the evaporator
increases
d. the operating cycle in the system is continuous
Answer>>
c
Question>> 6
Steam grid humidification used in HVAC systems work by injecting steam into:
a. the make up air stream
b. the rooms to be humidifier
c. the spray water of an air washer
d. the supply air stream
Answer>>
d
Page 3 of 94
, Question>> 7
In a hot water heating system air separators should be installed in:
a. horizontal lengths of pipe
b. vertical pipes
c. expansion tanks
d. hot water converters
Answer>>
a
Question>> 8
Before operating a new refrigeration plant, or one in which piping alterations have been
made, the system must be tested for:
a. high pressure
b. moisture content
c. excessive oil consumption
d. leaks
Answer>>
d
Question>> 9
Which of the following statements about strainers is false?
Page 4 of 94
REFRIGERATION Exam Questions and Answers
Latest Version Top Rated A+
Question>> 1
The purpose of a vacuum breaker used with steam heating coils is to:
a. prevent freezing caused by a vacuum or negative pressure in the steam coil
b. prevent negative air pressure in the conditioned space
c. ensure proper operation of the steam control valve
d. prevent flashing if the condensate within the steam coil
Answer>>
a
Question>> 2
The maximum temperature of the water in a gravity hot water system is:
a. 65 degrees celsius
b. 77 degrees celsius
c. 87 degrees celsius
Page 1 of 94
,d. 120 degrees celsius
Answer>>
b
Question>> 3
In a radiant heating system the maximum surface temperature of the walls is:
a. 20 degrees celsius
b. 38 degrees celsius
c. 45 degrees celsius
d. limited to 120 degrees celsius in accordance with ASME IV
Answer>>
b
Question>> 4
Refrigerant compressors:
a. must have intercoolers
b. could be the centrifugal type
c. use automotive style suction and discharge valves
d. have more cooling fins than air compressors
Answer>>
b
Page 2 of 94
,Question>> 5
Which of the following statements about lithium bromide absorption refrigeration systems
is FALSE?
a. lithium bromide solution has the ability to absorb water vapour readily
b. evacuating the system lowers the boiling point of water
c. as water vapour is absorbed by lithium bromide the pressure in the evaporator
increases
d. the operating cycle in the system is continuous
Answer>>
c
Question>> 6
Steam grid humidification used in HVAC systems work by injecting steam into:
a. the make up air stream
b. the rooms to be humidifier
c. the spray water of an air washer
d. the supply air stream
Answer>>
d
Page 3 of 94
, Question>> 7
In a hot water heating system air separators should be installed in:
a. horizontal lengths of pipe
b. vertical pipes
c. expansion tanks
d. hot water converters
Answer>>
a
Question>> 8
Before operating a new refrigeration plant, or one in which piping alterations have been
made, the system must be tested for:
a. high pressure
b. moisture content
c. excessive oil consumption
d. leaks
Answer>>
d
Question>> 9
Which of the following statements about strainers is false?
Page 4 of 94
