15 - sup 12

Question 1

The five essential parts basic to every compression refrigeration system are:
A) Compressor, Discharge valve, evaporator, filter, and condenser B) Evaporator, compressor, condenser, receiver, and expansion valve C) Expansion valve, timing belt, evaporator, receiver, and compressor
D) None of the above

Answer 1

B) Evaporator, compressor, condenser, receiver, and expansion valve page 21

Question 2

When a receiver safety valve blows prematurely _______ could be the problem.
A) Discharge line restricted
B) Safety valve set below cut-out pressure C) Loose unloader
D) None of the above

Answer 2

B) Safety valve set below cut-out pressure page 39

Question 3

One pound per square inch of air pressure is equivalent to ________ inches of mercury. A) 2.063
B) 2.360
C) 2.036
D) 2.630

Answer 3

C) 2.036 page 26

Question 4

Centrifugal compressors are positive-displacement devices True or False

Answer 4

FALSE page 19

Question 5

For every _______ lower intake air temperature, the gain in efficiency of an air compressor is approximately 1% A) 5 degrees B) 10 degrees C) 1 degree D) 15 degrees

Answer 5

A) 5 degrees page 13

Question 6

Air compressors are used for the operation of both oil and air blast circuit breakers. True or False

Answer 6

True page 10

Question 7

The most common type of modern air compressor is the rotary vane type. True or False

Answer 7

False page 10

Question 8

Keeping the reservoir oil at the prescribed level will help maintain the proper oil temperature, True or False

Answer 8

True page 33

Question 9

Kerosene is the recommended agent for cleaning air filters in an air compressor. True or False

Answer 9

False page 32

Question 10

Eliminating dust-laden intake air can minimize the possibility of explosions in air compressors. True or False

Answer 10

True page 36