CM Advanced Ch.13

Question 1

What is the treatment of air to ensure control of temperature, humidity, and dust (or foreign particles) at levels most suitable to personal comfort?

Answer 1

Air conditioning

Question 2

What is the process of producing low temperatures?

Answer 2

Refrigeration

Question 3

Two gases commonly used in the refrigeration process are refrigerant-12 and what else?

Answer 3

Refrigerant-22

Question 4

Refrigerant-12, otherwise known as R-12, freon-12 or F-12, boils at what temperature when at sea level?

Answer 4

-21.7°F

Question 5

When you are working with R-22, keep in mind that this refrigerant contains what which can be a fire hazard?

Answer 5

Methyl alcohol

Question 6

What is classified as a safe refrigerant because it is non-explosive, nonflammable, And noncorrosive?

Answer 6

R-12

Question 7

Each air-conditioning system must have a receiver/drier, an expansion valve or metering device, an evaporator, a compressor, and what else?

Answer 7

Condenser

Question 8

Condensers are of aluminum and can encounter pressures of approximately 150 to 300 psig and temperatures ranging from 120°F to what?

Answer 8

200°F

Question 9

Return excess uncontaminated refrigerants to what for disposition and disposal?

Answer 9

DRMO