Gas Questions Test

Question 1

A reading of 7.0’W.C is equal to in PSIG?

Answer 1

1/4 PSIG

Question 2

Atmospheric pressure at sea level, what is the boiling point of water?

Answer 2

212F(100C)

Question 3

True or False
By definition, the specific gravity of a gas(vapour) is; The weight of the gas as compared to the weight of air.

Answer 3

False,
The weight of the gas as compared to the weight of an equal volume of air

Question 4

True or False,
The specific gravity of propane is heavier than that of air?

Answer 4

True, Propane has a specific gravity of 1.52 w.c

Question 5

2.4% -9.5% is the lower and upper flammable limit of..?

Answer 5

Propane

Question 6

The approximate heat content of 1 cubic foot of propane is..?

Answer 6

2,500btu

Question 7

Natural gas and propane are mainly made of…

Answer 7

Carbon and Hydrogen

Question 8

True or false,
The flame temperature of propane is approximately 3,650C

Answer 8

False, its 3,650F

Question 9

True or False,
The igniton temp of propane is approx. 920F-1020F

Answer 9

True, or 493C-549C

Question 10

True or False,
The boiling temp of propane is 44F

Answer 10

False, the boiling temp is -44F

Question 11

When propane changes from a liquid to a vapour it expands and volume increases how many times?

Answer 11

270 times

Question 12

True or False,
One imperial gallon of propane weighs 5.1lbs.

Answer 12

True

Question 13

How many btu’s does one pound of propane release when it burns?

Answer 13

21,600btu’s

Question 14

The products of combustion are primarily composed of…?

Answer 14

H20,CO2, and Heat
Water, Carbon Dioxide, and Heat

Question 15

True or False,
As the temoerature of propane increases so does the pressure?

Answer 15

True, in a sealed container as the temperature of a medium increases so doth the pressure.

Question 16

The amount of CO2 produced by burning one cubic foot of propane is..?

Answer 16

3 cubic feet

Question 17

How much air is required to perfectly burn one cubic foot of propane?

Answer 17

23.5 cubic feet

Question 18

The air found in the products of combustion after complete combustion is called?

Answer 18

Excess air

Question 19

Air mixed with gas prior to combustion is called?

Answer 19

Primary Air

Question 20

Air that is mixed with the air fuel mixture at the point of combustion is so called?

Answer 20

Secondary Air

Question 21

Carbon monoxide is the product of the incomplete combustion of..?

Answer 21

A hydrocarbon

Question 22

True or False,
The air you breath is composed mostly of 80% Oxygen, and 20% nitrogen.

Answer 22

False, its composed mainly 80% Nitrogen and 20% Oxygen.

Question 23

A luminous flame is caused by…?

Answer 23

Not premixing air and fuel prior to combustion.

Question 24

A bunsen flame is cause by..?

Answer 24

Premixing the fuel and air prior to combustion.

Question 25

True or False, The max flame temp of natural gas is much lower than that of propane.

Answer 25

False, they are both approximately 3600F

Question 26

True or False, The Theoretical boiling point of natural gas at atmospheric pressure is -259F

Answer 26

True, or -162C

Question 27

How much air is required to burn of one cubic foot of Natural Gas?

Answer 27

10 cubic feet of air is required.

Question 28

True or False, Sulfur is added to natural gas and propane to aid in olfactory detection.

Answer 28

False, mercaptan is added for detection purposes.

Question 29

The specific gravity of natural gas is..?

Answer 29

0.55(0.60), Lighter than that of air

Question 30

What are the major constituents of flue gases after proper combustion?

Answer 30

Carbon dioxide(CO2), Dihydrogen Monoxide(H2O), Nitrogen(N2), Oxygen(O2), and Heat

Question 31

The two main Hydrocarbons in Natural Gas is...?

Answer 31

Methane, and Ethane

Question 32

Carbon Monoxide is produced through...?

Answer 32

Incomplete Combustion

Question 33

If you adjust a natural gas flame to produced just 10% more Carbon Dioxide you may....?

Answer 33

Produce Carbon Monoxide

Question 34

True or False, Adding more primary air you'll get superior effeciency.

Answer 34

False, youll produce flame lift.

Question 35

Both Carbon Dioxide and Nitrogen are....?

Answer 35

Inert

Question 36

True or False, Natural Gas is primarily made of 85-90% Ethane.

Answer 36

False, it is made of 85-90% Methane.

Question 37

One boiler horsepower is approximately how many BTUh?

Answer 37

34,000 Btuh's or 10 KW

Question 38

Two undesirables of incomplete combustion are...?

Answer 38

Aldehydes and Carbon Monoxide.

Question 39

The relative density of LIQUID propane is....

Answer 39

Lighter, 0.51 of water.

Question 40

What is combustion air?

Answer 40

The air required for satisfactory combustion of a gas with excess air.

Question 41

How far should be the base of a ladder is from the building if the ladder is 36 feet high?

Answer 41

12ft

Question 42

What does MSDS stand for?

Answer 42

Material safety data sheet

Question 43

A ladder must extend above roof landing by?

Answer 43

36

Question 44

Who is the testing agency that certifies venting?

Answer 44

ULC Underwriters labratory of Canada

Question 45

What is needed to start combustion?

Answer 45

heat, air, fuel

Question 46

What is the air needed to operate a gas appliance safely?

Answer 46

Combustion air, (Primary, Secondary, Excess air), dilution air

Question 47

What is air comprised of?

Answer 47

80% nitrogen 20% oxygen

Question 48

What type of air is premixed with gas prior to ignition?

Answer 48

Primary air

Question 49

What type of air surrounds the flame for combustion?

Answer 49

Secondary air

Question 50

What is the maximum filling density of propane containers?

Answer 50

80%