Test Practice Flashcards by Dylan Hall

Key safety categories to be considered by a gas technician

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

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

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

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

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

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What does OHSA stand for

Occupational health & safety act

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Which regulates workplace safety

The province of Ontario

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What should MSDS sheets be used for by a technician

Flammable. Corrosive. Explosive

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Who’s responsible for a hazard

The person who is aware of it

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Why should garbage be removed from a job site

Prevent. slips Trips. Falls

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Who regulates workplace safety

The province of Ontario

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An employer is responsible for

Ensuring safety instruction is provided

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Workers must wear protective clothing that …

Employer instructs them to wear

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

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

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

Notify the employer within 8 hours

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How many classes of fire extinguishers

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

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Key pieces of PPE

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

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What fastener would you use to join 2 electrical conductors

Marrette

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

Gear clamp

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Shot for powder activated guns is stored

In a dry secure location

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Purpose of a drill gauge

Measure diameter of a drill bit

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

Pressure side added to amount displaced on atmospheric side

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7” w.c equals what psig

1/4 psig

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The boiling point of water is

212F. 100C

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How should you disconnect an electric drill

Pulling plug at outlet

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Carbon bit is used for

Steel

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Carbide bit is used for

Concrete

Lead shields are used to anchor fasteners into

Concrete

Copper wire should be skinned with

Wire strippers

Specific gravity of vapour is (definition)

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

The specific gravity of propane vapour is _ than air

Greater than air

The specific gravity of propane is

1.52” w.c

Lower and upper flammable limits of propane are ?

2.4% to 9.5%

Heat content of 1 cubic foot of propane is

2500 btu

Propane and natural gas are composed of mainly what elements

Carbon. Hydrogen

Ignition temperature of propane is

920F - 1020F

Relative density of propane is _ the density of air

1 1/2 times

Boiling point of propane at atmospheric pressure is

-44F

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

185 times out of

One imperial gallon of propane weighs

5.1 pounds

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

21,600 btu

The products of propane combustion are

H20. CO2. Heat

As temper of liquid in propane tank increases, vapour pressure

Increases

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

3 cu ft

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

25 cu ft

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

Excess air

What gas is toxic

Carbon monoxide

Air that is mixed with fuel prior to ignition is called

Primary air

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

Secondary air

Carbon monoxide is a product of incomplete combustion of

Hydro carbon

Air is about

80% nitrogen 20% oxygen

A luminous flame is caused by

Not premixing air and fuel prior to combustion

A Bunsen flame is caused by

premixing air and fuel prior to combustion

The specific gravity of natural gas is _ than air

Less than that of air

Natural gas and propane are composed mainly of

Carbon and nitrogen

The flame temperature of natural gas is approximately

3500F

Theoretical boiling point of natural gas at atmospheric pressure is

-259F

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

Water (vapour). Carbon dioxide. Heat

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

10 cu ft

The odorant added to natural gas for detection purposes is

Mercaptan

What is the approximate ignition temperature of natural gas

1200F

The specific gravity of natural gas is

0.60

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

CO2. H2O. N2. O2. Heat

A Bunsen flame is characterized by its

Blue appearance

The two main hydrocarbons which form natural gas are

Methane and ethane

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

1 part gas 10 parts air

Carbon monoxide is produced through

Incomplete combustion

The products of complete combustion of natural gas in air are

Carbon dioxide . water vapour. Heat

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

Carbon monoxide may be produced

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

Flame lift

Carbon dioxide and nitrogen are

Inert gases

Natural gas is 85 to 90%

Methane

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

10,000 cu ft

One boiler horsepower is approximately

34000 Btu (10kW)

Two undesirable products of incomplete combustion are

CO. Aldehydes

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

Nitrogen

The relative density of liquid propane is approximately

0.5

Propane is a

Hydrocarbon

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

8.50

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

20% lower explosive limit

Upper and lower limits of flammability- gas and air mixture

4 to 14%

Carbon monoxide is

A toxic gas that’s combustible

The heat content of 1 cubic foot of natural gas is

1000 Btu

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

TSSA

Who can certify gas appliances

Canadian gas association. Underwriters laboratories. CSA. TSSA

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

Transport Canada

Test Practice Flashcards

(84 cards)