Chapter 118

Question 0

In many cases, evaporator pressure must not be allowed to drop below a certain level to prevent which of the following results?
A) damage to the compressor
B) air leakage into the evaporator
C) frosting of cooling coils
D) freeze up in the water chiller
E) A & C
F) B & C
G) C & D

Answer 0

G) C & D

Frosting of cooling coils and freeze up in the water chiller

Question 1

Pressure limiting devices shall be provided on all systems containing more than:
A) 9 kg of refrigerant
B) 7 kg of refrigerant
C) 10 kg of refrigerant
D) 5 kg of refrigerant
E) 3 kg of refrigerant

Answer 1

A) 9 kg of refrigerant

Question 2

A pressure actuated control can be used together with an automatic expansion valve.
A) true
B) false

Answer 2

B) false

Question 3

The high pressure cutout switch must be situated after the first stop valve.
A) true
B) false

Answer 3

B) false