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HEATING RFP1 > Review Test > Flashcards

Review Test Flashcards

1
Q

Can a gas fitter B exceed 400,000 BTU

A

No

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2
Q

What combustible component of natural gas is typically 95%

A

Methane

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3
Q

What are oil, natural gas and coal classified as

A

Hydrocarbon

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4
Q

Water to steam specific heat

A

970

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5
Q

Water to ice specific heat

A

144

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6
Q

What are the operating pressures of a transmission pipeline

A

300psi-1500psi

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7
Q

Which substance is added to natural gas to provide its odor

A

Mercaptan

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8
Q

What does LPG stand for

A

liquefied petroleum gas

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9
Q

What temperature does natural gas liquify at

A

-258°F

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10
Q

Boiling point of propane at atmospheric pressure

A

-44

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11
Q

Natural state of natural gas

A

Gas

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12
Q

What’s the heating value of natural gas

A

1000btu/cubic foot

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13
Q

How much combustion air is needed for on cubic foot of propane

A

24 cubic feet

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14
Q

What pressure does the home regulator reduce the propane pressure to

A

11”WC

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15
Q

What pressure is gas distributed across the city

A

12-80 psig

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16
Q

Canadian natural gas installation code is

A

CSA149.1

17
Q

When gas burns properly the hydrogen combines with the oxygen to produce water vapor, what is produced when the carbon combines with the oxygen

A

Carbon dioxide

18
Q

An gas fitter A can work on

A

Appliances and piping downstream of the gas meter

19
Q

Natural gas flammability range is

A

5-15%

20
Q

Chemical formula for natural gas

A

CH4

21
Q

Natural gas is lighter or heavier than air

A

Lighter

22
Q

Propane Vapour is lighter or heavier than gas

A

Heavier

23
Q

Propane chemical formula is

A

C3H8

24
Q

Min size pressure gauge when testing rough piping

A

3”

25
Q

Where and how is the standing pressure obtained from a gas furnace system

A

Between the meter and the appliance with no gas flowing

26
Q

Where and how is the manifold pressure obtained in a gas furnace

A

Between the appliance control valve and the burner while the appliance is firing

27
Q

Manifold pressure for natural gas and propane are

A

3-4 natural gas
11” propane

28
Q

What does the air shutter control

A

Amount of primary aur

29
Q

What is the purpose of aldehydes

A

Nothing that are a by product of incomplete combustion

30
Q

Three components of the combustion triangle

A

Air, fuel, heat

31
Q

What would cause a roaring and lifting flame

A

Too much primary air

32
Q

What pressure of natural gas is delivered from a service regulator to piping inside a home

A

7-14”wc

33
Q

What pressure is finish piping tested to

A

Working pressure

34
Q

Vent gases are made up of

A

Dilution air and flue gases

35
Q

When sulphur isn’t removed from gas what happens

A

Acid rain

36
Q

Propanes volume increase by how much when changing from a liquid to a Vapour

A

270X

HEATING RFP1 (8 decks)

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