Chapter 20

Question 1

At least ___ pressure gauges are normally used on a refrigeration system.
A. 2
B. 3
C. 4
D. 5

Answer 1

A

Question 2

Which of the following statements are correct pertaining to the location of the sight glass?
A. The sight glass will be installed at the receiver or condenser receiver outlet if it is used to indicate whether the system is fully charged.
B. The glass is installed before the expansion valve if it is used to indicate if the refrigeration contains any flash paper.
C. If the glass is combined with a moisture indicator and a liquid line from the receiver has a dryer, then the glass should be installed between the dryer and the expansion valve.
D. All are correct.

Answer 2

D

Question 3

The type of piping and tubing material used in a refrigeration system depends upon the
A. Size of the piping and tubing required,
B. Refrigerant used,
C. Application,
D. All of the above.

Answer 3

D

Question 4

What size of pipe schedule should be used when the diameter of steel piping is 25 mm or less?
A. 40
B. 80
C. 120
D. 160

Answer 4

B

Question 5

The diffuser on the emergency release line is placed not less than ___ away from any windows or other openings.
A. 2.4m
B. 4.8m
C. 7.6m
D. 10m

Answer 5

C