CM Advanced Ch.8

Question 1

The three types of air compressors are reciprocating, sliding vane, and what other design?

Answer 1

Screw

Question 2

Currently, the most common industrial air compressor in the NCF is what type?

Answer 2

Oil-injected rotary vane

Question 3

On the compressor, a pressure release(safety relief) valve releases excess air pressure to protect personnel, the compressor, tanks, and piping from damage if the air pressure exceeds the design limits. The safety valve is mounted in plain view on the air receiver and is normally set at what psi?

Answer 3

125

Question 4

Air discharge temperatures of 220°F to what (temperatures ratings vary to manufacturer) will cause the engine to shut down?

Answer 4

250°F

Question 5

Air compressors are governed by what type of device?

Answer 5

Pressure control

Question 6

Do NOT use what as a filter element as it will pack down and stop the airflow?

Answer 6

Cotton

Question 7

Air compressors are protected against ingestion of dust and foreign particles by air cleaners. These maybe oil bath or what other type?

Answer 7

Dry-filter

Question 8

What should never be used to clean air filter elements as it causes explosive fumes to collect in the air receiver?

Answer 8

Gasoline or kerosene

Question 9

What acts as an oil sump and a condensation chamber for the removal of oil and water vapors?

Answer 9

Air receiver

Question 10

What air compressors do not require oil separators because oil is not circulated through the air system?

Answer 10

Reciprocating

Question 11

If you remove the heat generated by compressing air, the total horsepower required for additional air compression is reduced up to what percent?

Answer 11

15%

Question 12

After leaving the filter, a thermostatic controlled valve directs heated oil through an oil cooler to keep the oil temperature between 130°F and what?

Answer 12

180°F

Question 13

Preventive maintenance procedures for all three types of air compressors are outlined in current manuals for the unit you are working on or operating. USE THEM!!! Oil should be changed according to these manuals, in most cases, at how many-hour intervals?

Answer 13

500

Question 14

Because of the durability of the vane and screw type air compressors, major overhaul is seldom required, a properly maintained unit will perform reliability for how many hours or more?

Answer 14

10,000

Question 15

The primary wear point on the rotary type air compressor is the what?

Answer 15

Rotor vanes