Deck 1: Heating and Air Conditioning - History and the Environment

Question 1

Carbon Dioxide is considered a greenhouse gas that may contribute to global warming.

Answer 1

True

Question 2

Technician A says chlorine in CFC-12 (R-12)refrigerant may destroy ozone molecules for over a century.Technician B says O₃ is destroyed and created by UV radiation.Who is correct?

A) Technician A only
B) Technician B only
C) Both A and B
D) Neither A nor B

Answer 2

C

Question 3

Technician A says air conditioning is the process of controlling the passenger compartment comfort level.Technician B says the fluid that circulates through an air conditioning system is referred to generically as refrigerant.Who is correct?

A) Technician A only
B) Technician B only
C) Both A and B
D) Neither A nor B

Answer 3

C

Question 4

Technician A says ozone at ground level protects life from damaging ultraviolet radiation.Technician B says ozone is a poisonous gas.Who is correct?

A) Technician A only
B) Technician B only
C) Both A and B
D) Neither A nor B

Question 5

Only some employees are covered by "right-to-know" laws

Question 6

Stratospheric ozone absorbs about ____ percent of incoming solar radiation.

A) 3
B) 10
C) 21
D) 78

Question 7

The EPA is a federal regulatory agency.

Question 8

Automotive technicians who service mobile air conditioning systems must be certified by an EPA-approved testing agency.

Question 9

The odor of a gas is not an indication of its toxicity.

Question 10

Chlorofluorocarbons are being discussed.Technician A says CFC's production and use is strictly regulated by the Clean Air Act.Technician B says chlorofluorocarbons are an artificially made chemical.Who is correct?

A) Technician A only
B) Technician B only
C) Both A and B
D) Neither A nor B

Question 11

Technician A says ozone is both created and destroyed by the action of UV radiation on oxygen molecules.Technician B says chlorine is the major gas causing the destruction of ozone.Who is correct?

A) Technician A only
B) Technician B only
C) Both A and B
D) Neither A nor B

Question 12

In the greenhouse effect what type of radiation is re-emitted by the earth's surface and is absorbed and reflected by greenhouse gas molecules in the atmosphere warming the earth's surface and lower atmosphere?

A) Ultraviolet
B) Infrared
C) Gama
D) Nuclear

Question 13

The Clean Air Act became law in

A) 1985.
B) 1970.
C) 1980.
D) 1990.

Question 14

Most ozone is formed over the earth's equator.

Question 15

No special equipment is required to service R-134a (HFC-134a)refrigerant systems.

Question 16

George H.W.Bush signed the Clean Air Act ammendment of 1990 into law that placed strict regulations on CFC emissions.

Question 17

Technician A says UV radiation inhibits the human body's immune system and causes skin tissue damage.Technician B says the release of CFCs into the atmosphere could help decrease the greenhouse effect.Who is correct?

A) Technician A only
B) Technician B only
C) Both A and B
D) Neither A nor B

Question 18

Ozone has the same chemical properties as carbon monoxide.

Question 19

The most common gas in the earth's atmosphere is oxygen.

Question 20

Ozone is formed by the action of

A) lightning.
B) electrical equipment.
C) ultraviolet radiation.
D) all of the above.

Question 21

What does EPA stand for?

Question 22

What is the maximum temperature that a refrigerant cylinder is designed to be subjected to?

Question 23

What has NASA determined to be a potential major threat to ozone layer depletion besides CFCs?

Question 24

What is the common name or number used for the hydro-fluorocarbon (HFC)refrigerant used in automotive refrigerant systems today?

Question 25

What should the technician do before loosening bolts or screws on a refrigeration system?

Question 26

What is the main ingredient of most automotive coolants?

Question 27

What is the air we breathe made up of?

A) 51 percent oxygen and 49 percernt nitrogen
B) 21 percent oxygen and 78 percernt nitrogen
C) 21 percent nitrogen and 78 percernt oxygen
D) 12 percent oxygen and 88 percernt nitrogen

Question 28

Technician A says a refrigerant service cylinder should have a pressure relief valve.Technician B says a fusible plug gives excellent protection between 160°F and 180°F.Who is correct?

A) Technician A only
B) Technician B only
C) Both A and B
D) Neither A nor B

Question 29

What does SNAP stand for?

Question 30

Technician A says HFC-134a (R-134a)tanks are designed to hold a specific amount of refrigerant at a specific temperature.Technician B says overfilling the tank could cause it to burst at room temperature.Who is correct?

A) Technician A only
B) Technician B only
C) Both A and B
D) Neither A nor B

Question 31

Technician A says the MSDS lists when the hazardous material was purchased by the shop.Technician B says the MSDS lists the protective clothing or equipment for that material.Who is correct?

A) Technician A only
B) Technician B only
C) Both A and B
D) Neither A nor B

Question 32

Explain why carbon dioxide in the atmosphere is necessary for life on earth.

Question 33

List four major components of chlorofluorocarbons (CFCs,freon,and halons).

Question 34

Technician A says that it is safe to release R-12 refrigerant into the atmosphere.Technician B says as sunlight strikes CFC molecules in the statosphere chlorine will be released.Who is correct?

A) Technician A only
B) Technician B only
C) Both A and B
D) Neither A nor B

Question 35

The Clean Air Act is being discussed.Technician A says the Montreal Protocol is one of the results of the Clean Air Act.Technician B says it gave the EPA authority to control refrigerants in order to protect the environment.Who is correct?

A) Technician A only
B) Technician B only
C) Both A and B
D) Neither A nor B

Question 36

What does the term ozone hole refer to?

Question 37

Technician A says CFC-12 (R-12)is no longer being manufactured in the United States.Technician B says CFC-12 (R-12)refrigerant can still be sold.Who is correct?

A) Technician A only
B) Technician B only
C) Both A and B
D) Neither A nor B

Question 38

What does the word toxicity mean?

Question 39

Hydrostatic pressure is being discussed.Technician A says the pressure in a tank will increase as the liquid cools.Technician B says the containment system (tanks and lines)must withstand the changing pressures created as the liquid changes states.Who is correct?

A) Technician A only
B) Technician B only
C) Both A and B
D) Neither A nor B

Question 40

How many ozone molecules can be destroyed by a single molecule of chlorine?

Question 41

Name some effects of ultraviolet radiation.

Question 42

On January 1,2011 the European Union EU 2006/40/EC Act provisions went into effect.What impact does this act have on refrigerant systems?

Question 43

What is the greenhouse effect?

Question 44

What does Title 6 of the Clean Air Act cover?

Question 45

Explain why ozone in the atmosphere is necessary for life on earth.

Question 46

Describe what is contained in a Material Safety Data Sheet (MSDS).

Question 47

What are some of the factors that contribute to the greenhouse effect and climate change?

Question 48

What is the earth's natural processes by which concentrations of carbon dioxide in the atmosphere are regulated and give an example of how it works.