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G3 > Test Practice > Flashcards

Test Practice Flashcards

1
Q

Key safety categories to be considered by a gas technician

A

Personal. Tools. Equipment. Others. Site. OHSA. Ontario gas utilization code

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2
Q

How would a gas technician demonstrate a concern for the safety of others

A

Demonstrating the correct use of a new tool to a co worker

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3
Q

What should a gas technician do when a new piece of equipment is introduced for use

A

Get a copy of the users manual and read it before using the equipment

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4
Q

What does OHSA stand for

A

Occupational health & safety act

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5
Q

Which regulates workplace safety

A

The province of Ontario

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6
Q

What should MSDS sheets be used for by a technician

A

Flammable. Corrosive. Explosive

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7
Q

Who’s responsible for a hazard

A

The person who is aware of it

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8
Q

Why should garbage be removed from a job site

A

Prevent. slips Trips. Falls

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9
Q

Who regulates workplace safety

A

The province of Ontario

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10
Q

An employer is responsible for

A

Ensuring safety instruction is provided

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11
Q

Workers must wear protective clothing that …

A

Employer instructs them to wear

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12
Q

Workers compensation board act says that in all cases of injury or disease an employer must

A

Make sure there is a record of the first aid treatment and any advice given to the worker

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13
Q

According to workers compensation board act what is the workers obligation in all cases of injury/ disease

A

Notify the employer within 8 hours

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14
Q

How many classes of fire extinguishers

A

5 ( A,B,C, D, K)

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15
Q

Key pieces of PPE

A

Hard hat. Gloves. Ear plugs. Dust mask. Safety glasses. Work boots. Face shield

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16
Q

What fastener would you use to join 2 electrical conductors

A

Marrette

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17
Q

Fastener used to connect a hose to a fan coil unit is

A

Gear clamp

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18
Q

Shot for powder activated guns is stored

A

In a dry secure location

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19
Q

Purpose of a drill gauge

A

Measure diameter of a drill bit

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20
Q

How to determine the indicated gas pressure on a U tube manometer

A

Pressure side added to amount displaced on atmospheric side

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21
Q

7” w.c equals what psig

A

1/4 psig

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22
Q

The boiling point of water is

A

212F. 100C

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23
Q

How should you disconnect an electric drill

A

Pulling plug at outlet

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24
Q

Carbon bit is used for

A

Steel

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25
Q

Carbide bit is used for

A

Concrete

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26
Q

Lead shields are used to anchor fasteners into

A

Concrete

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27
Q

Copper wire should be skinned with

A

Wire strippers

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28
Q

Specific gravity of vapour is (definition)

A

The weight of the gas compared to the weight of an equal volume of air

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29
Q

The specific gravity of propane vapour is _ than air

A

Greater than air

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30
Q

The specific gravity of propane is

A

1.52” w.c

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31
Q

Lower and upper flammable limits of propane are ?

A

2.4% to 9.5%

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32
Q

Heat content of 1 cubic foot of propane is

A

2500 btu

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33
Q

Propane and natural gas are composed of mainly what elements

A

Carbon. Hydrogen

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34
Q

Ignition temperature of propane is

A

920F - 1020F

35
Q

Relative density of propane is _ the density of air

A

1 1/2 times

36
Q

Boiling point of propane at atmospheric pressure is

A

-44F

37
Q

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

A

185 times out of

38
Q

One imperial gallon of propane weighs

A

5.1 pounds

39
Q

When one pound of propane burns it realeases approximately how many btu

A

21,600 btu

40
Q

The products of propane combustion are

A

H20. CO2. Heat

41
Q

As temper of liquid in propane tank increases, vapour pressure

A

Increases

42
Q

The amount of CO2 produced per cubic foot of propane burned is

A

3 cu ft

43
Q

The amount of air required to burn 1 cubic foot of propane is approximately

A

25 cu ft

44
Q

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

A

Excess air

45
Q

What gas is toxic

A

Carbon monoxide

46
Q

Air that is mixed with fuel prior to ignition is called

A

Primary air

47
Q

Air that is mixed with fuel at the point of combustion and around the flame is

A

Secondary air

48
Q

Carbon monoxide is a product of incomplete combustion of

A

Hydro carbon

49
Q

Air is about

A

80% nitrogen 20% oxygen

50
Q

A luminous flame is caused by

A

Not premixing air and fuel prior to combustion

51
Q

A Bunsen flame is caused by

A

premixing air and fuel prior to combustion

52
Q

The specific gravity of natural gas is _ than air

A

Less than that of air

53
Q

Natural gas and propane are composed mainly of

A

Carbon and nitrogen

54
Q

The flame temperature of natural gas is approximately

A

3500F

55
Q

Theoretical boiling point of natural gas at atmospheric pressure is

A

-259F

56
Q

The products of complete combustion of natural gas and propane are primarily

A

Water (vapour). Carbon dioxide. Heat

57
Q

The amount of air required to burn 1 cubic foot of natural gas is

A

10 cu ft

58
Q

The odorant added to natural gas for detection purposes is

A

Mercaptan

59
Q

What is the approximate ignition temperature of natural gas

A

1200F

60
Q

The specific gravity of natural gas is

A

0.60

61
Q

The major constituents of flue gases after the proper combustion of natural gas in air are

A

CO2. H2O. N2. O2. Heat

62
Q

A Bunsen flame is characterized by its

A

Blue appearance

63
Q

The two main hydrocarbons which form natural gas are

A

Methane and ethane

64
Q

What theoretical gas to air ratio is necessary to achieve perfect combustion with an atmospheric natural gas burner

A

1 part gas 10 parts air

65
Q

Carbon monoxide is produced through

A

Incomplete combustion

66
Q

The products of complete combustion of natural gas in air are

A

Carbon dioxide . water vapour. Heat

67
Q

If a natural gas flame is adjusted to produce more than 10% carbon dioxide

A

Carbon monoxide may be produced

68
Q

What could result if a flame is adjusted with too much primary air

A

Flame lift

69
Q

Carbon dioxide and nitrogen are

A

Inert gases

70
Q

Natural gas is 85 to 90%

A

Methane

71
Q

How much air is required to burn 1000 cubic feet of natural gas per hour

A

10,000 cu ft

72
Q

One boiler horsepower is approximately

A

34000 Btu (10kW)

73
Q

Two undesirable products of incomplete combustion are

A

CO. Aldehydes

74
Q

Which substance is inert and passes through the combustion zone absorbing heat during the combustion process

A

Nitrogen

75
Q

The relative density of liquid propane is approximately

A

0.5

76
Q

Propane is a

A

Hydrocarbon

77
Q

At 60F a pound of propane produces how many cubic feet of gas

A

8.50

78
Q

Propane shall have a distinctive odour content to ensure it is readily detectable down to concentrations of

A

20% lower explosive limit

79
Q

Upper and lower limits of flammability- gas and air mixture

A

4 to 14%

80
Q

Carbon monoxide is

A

A toxic gas that’s combustible

81
Q

The heat content of 1 cubic foot of natural gas is

A

1000 Btu

82
Q

Which organization is responsible for administering fuel regulations for installation of gas and oil appliances

A

TSSA

83
Q

Who can certify gas appliances

A

Canadian gas association. Underwriters laboratories. CSA. TSSA

84
Q

Propane cylinders in Ontario must be manufactured and approved to the requirements of

A

Transport Canada

G3 (1 decks)

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