Chapter 120

Question 0

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) 20%
B) 15%
C) 10%

Answer 0

C) 10%

Question 1

A chemical dot placed under the glass lens of a sight glass, which is exposed to the liquid, serves what function?

Answer 1

To detect the presence of moisture in the system

Question 2

Oil in the condenser of a propane refrigeration system will not affect the efficiency of the condenser.
A) true
B) false

Answer 2

B) false

Question 3

The distributor in a refrigeration system is to be placed upstream of the expansion valve.
A) true
B) false

Answer 3

B) false

Question 4

Vibration absorbers shall be placed as close as possible to the compressor.
A) true
B) false

Answer 4

A) true

Question 5

The manual valve on the emergency discharge line shall be installed in glass fronted box painted:
A) blue
B) orange
C) red
D) green

Answer 5

C) red

Question 6

The two most common pressure relief devices for refrigeration systems are:
A) solenoid valves and fusible plugs
B) fusible plugs and globe valves
C) globe valves and spring loaded relief valves
D) spring loaded relief valves and fusible plugs

Answer 6

D) spring loaded relief valves and fusible plugs