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Flashcards in Final Study Deck (56)
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1

What must the gasfitter make sure to do when leaving a job?

Make sure that all the appliances are in the safe working order

2

Removing the ground prong on a power tool can?

Kill you

3

Should an accident occur on a gas installation after taking all necessary precautions, the primary responsibility will be that of the:

Licensed gasfitter

4

The first thing to do when dismantling a gas appliance is:

Shut off the gas to the appliance

5

To ventilate a building in event of a propane gas leak:

The upper story windows should be opened and;
The basement windows should be opened

6

A unit of power or heat rate that is 1000 times the base unit is used to:

Used to rate appliances

7

A hydrocarbon gas is one that:

Is composed of hydrogen and carbon molecules

8

The average amount of energy released by burning a gas is given in?

BTU/CF (BTU/ft³)
or
kJ/m³

9

Manufactured gas is a product of?

Coal gasification

10

LP gases are so named because they are normally stored and transported as ______.

Liquids

11

S.T.P. is used in calculation of?

Standard gas volumes

12

Natural and propane gases are both naturally odorless, naturally colorless, and naturally non-_____ .

Non-toxic

13

Mercaptan is
A) odorless
B) colorless
C) non-combustible
D) tensile

B) colorless

14

Is liquid propane more dense than water?

No. Liquid propane has a relative density of 0.51

15

The heating value of natural gas is

1000 BTU/CF or 37500 kJ/m³

16

The maximum flame temperature of natural gas is:
A) lower than propane
B) higher than butane
C) higher than propane
D) (A) and (C) above

A) lower than propane
The maximum flame temperature of natural gas is 3500°F… Lower than that of both propane and butane at 3650°F and 3660°F

17

Natural gas is:
A) A product of decaying organic matter
B) A byproduct of refining processes
C) distilled from crude oil
D) none of the above

A) A product of decaying organic matter

18

Referring to a gas what does LPG stand for?

Liquified Petroleum Gas

19

A cubic foot of natural gas weighs?

3/4 oz

20

The relative density of natural gas is?

0.6

21

When a fuel gas is burned completely it will make:
A) water
B) soot
C) nitrogen
D) all of the above

D) all of the above

22

Carbon monoxide has a chemical symbol of:

CO

23

When a substance is combined with oxygen, the process is called:

Oxidation

24

The most common method of extinguishing Type A fires is to remove the?

Oxygen

25

The three T's are?

Necessary for complete combustion:
Time
Temperature
Turbulence

26

Does nitrogen in the air change in the combustion process?

No. Nitrogen is virtually unchanged in the combustion of gases

27

The oxygen used for combustion makes up ____% of air

20%

28

The main cause of incomplete combustion is?

Not enough combustion air

29

Combustion is best described as:

Rapid oxidation

30

What are the products of complete combustion?

Heat
Light
H2O
CO2