Chapter 24

Question 1

Which of the following are the distinct classes of refrigeration controls?
A. Operating or Primary Controls
B. Actuating or Secondary Controls
C. Limiting and Safety Controls
D. All of the above

Answer 1

D

Question 2

In the event of a low oil pressure condition, the oil pressure failure switch will
A. Open the recycle valve to take the load off the compressor
B. Stop the flow of refrigerant to the system
C. Shut down the compressor
D. Sound an audible alarm

Answer 2

C

Question 3

CSA B-52 Mechanical Refrigeration Code requires that all refrigeration systems except listed and approved factory-sealed systems containing less than ____ of Group A1 refrigerant and operating above atmosphere pressure shall be equipped with a pressure-limited device.
A. 10 kg
B. 5 kg
C. 15 kg
D. 20 kg

Answer 3

A