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Gases

Total questions: 54

Worksheet time: 27mins

Name
Class
Date
1.

What is the cylinder colour for Propane?

a)

Red

b)

Blue

c)

Yellow

d)

Maroon

2.

What is the thread direction for Oxygen?

a)

Left hand

b)

Right hand

3.

Fill in the blank: The cylinder colour for Butane is _______.

a)

Blue

b)

Red

c)

Green

d)

Yellow

4.

Which part of the Oxyacetylene equipment is responsible for controlling the main flow of gas?

a)

Main control valve

b)

Pressure gauge

c)

Hose connector

d)

Mixer chamber

5.

Which part of the Oxyacetylene equipment is used to regulate the pressure of the gases?

a)

Pressure regulator

b)

Torch handle

c)

Gas hose

d)

Nozzle

6.

Which part of the Oxyacetylene equipment displays the pressure readings?

a)

Gauges

b)

Hose

c)

Torch

d)

Cylinder

7.

Which safety device in the Oxyacetylene equipment prevents flames from traveling back into the hoses?

a)

Flashback arrestor

b)

Pressure regulator

c)

Check valve

d)

Hose clamp

8.

What are the flexible tubes called that carry gases from the cylinders to the torch in Oxyacetylene equipment?

a)

Hoses

b)

Valves

c)

Regulators

d)

Nozzles

9.

Liquefied Petroleum Gas is a group of gases that includes ______ and butane.

a)

propane

b)

methane

c)

ethane

d)

carbon dioxide

10.

LPG is highly flammable when mixed correctly with what?

a)

Water

b)

Air

c)

Oil

d)

Sand

11.

LPG is ______ than air.

a)

heavier

b)

lighter

c)

colder

d)

warmer

12.

At what temperature does propane turn from liquid to gas?

a)

-42ºC

b)

0ºC

c)

-10ºC

d)

-78ºC

13.

If drawn off too quickly, what can happen to the valves of LPG equipment?

a)

The valves can freeze.

b)

The valves can overheat.

c)

The valves can corrode instantly.

d)

The valves can expand excessively.

14.

LPG should be used and stored in what kind of areas?

a)

Well-ventilated and signed areas.

b)

Closed and unventilated spaces.

c)

Near open flames and heat sources.

d)

In damp and dark basements.

15.

CO₂ can build up in confined spaces.

a)

True

b)

False

16.

When LPG is in use, what type of fire extinguisher must be present?

a)

CO₂ fire extinguisher

b)

Water fire extinguisher

c)

Foam fire extinguisher

d)

Dry powder fire extinguisher

17.

When visually inspecting gas equipment, should you check for damage to hoses?

a)

True

b)

False

18.

When visually inspecting gas equipment, should you check for damage to valves?

a)

True

b)

False

19.

When visually inspecting gas equipment, should you check for damage to gauges?

a)

True

b)

False

20.

When visually inspecting gas equipment, should you check for damage to threaded connectors?

a)

True

b)

False

21.

When visually inspecting gas equipment, should you check for leak detection fluid on joints?

a)

True

b)

False

22.

What is the correct way to store a gas cylinder?

a)

Lying down inside a closed room

b)

Upright, outside, in a well-ventilated lockable store, with labels

c)

In a vehicle without ventilation

d)

In a basement without labels

23.

What should you do when transporting gas cylinders in a vehicle?

a)

Lay them flat and keep windows closed

b)

Keep cylinders upright with ventilation and label on outside

c)

Store them in the trunk without labels

d)

Place them under seats

24.

If transporting quantities of gas, the driver must be in possession of a ________.

a)

Tremcard

b)

License Plate

c)

Insurance Policy

d)

Fuel Receipt

25.

Which document must a driver possess when transporting quantities of gas, according to Carriage of Dangerous Goods by Road Regulations?

a)

Driving license

b)

Tremcard

c)

Insurance certificate

d)

Passport

26.

Look at the warning signs shown. What does the yellow triangle sign with 'L.P.G. Highly flammable' indicate?

a)

Non-flammable gas

b)

Highly flammable gas

c)

Toxic gas

d)

Corrosive material

27.

One of the dangers of LPG is its presence in ________.

a)

cellars

b)

kitchens

c)

garages

d)

attics

28.

Fill in the blank: LPG should not be stored near ________ entrances.

a)

drain

b)

main

c)

side

d)

back

29.

LPG is flammable.

a)

True

b)

False

30.

Fill in the blank: Flames in loft areas can be dangerous due to ________ and insulation.

a)

dust

b)

water

c)

metal

d)

paint

31.

Fill in the blank: Build up of ________ or CO in confined spaces is a danger of LPG.

a)

CO2

b)

O2

c)

N2

d)

H2

32.

Fill in the blank: Burns to property and persons can occur from the ________ and component of LPG equipment.

a)

nozzle

b)

valve

c)

pipe

d)

regulator

33.

Fill in the blank: Cold burns can result from the ________ and cylinder of LPG.

a)

valve

b)

hose

c)

regulator

d)

burner

34.

Leaks are a potential danger of LPG.

a)

True

b)

False

35.

What are the three components needed to create fire according to the fire triangle?

a)

Fuel, oxygen, and heat

b)

Water, carbon dioxide, and light

c)

Nitrogen, hydrogen, and electricity

d)

Sand, oil, and wind

36.

Fire is one of the most destructive elements. Combustion is a chemical reaction with oxygen. Which of the following equations correctly represents the process of creating fire?

a)

Fuel + oxygen + heat = fire

b)

Water + oxygen + heat = fire

c)

Fuel + nitrogen + heat = fire

d)

Fuel + oxygen + cold = fire

37.

Fire is one of the most destructive elements. Combustion is a chemical reaction with oxygen. True or False: Propane + oxygen + spark = flame.

a)

True

b)

False

38.

What is combustion?

a)

Combustion is a chemical reaction with oxygen.

b)

Combustion is a physical change in water.

c)

Combustion is the process of freezing gases.

d)

Combustion is the mixing of two solids.

39.

Which type of fire extinguisher should be used on wood, paper, and textiles?

a)

Water

b)

Dry powder

c)

Foam

d)

CO2 (Carbon dioxide)

40.

Which type of fire extinguisher should NOT be used on live electrical equipment?

a)

Water

b)

Dry powder

c)

Foam

d)

CO2 (Carbon dioxide)

41.

Fill in the blank: Care should also be taken when using CO2 extinguishers in an enclosed space because of _________

a)

asphyxiation

b)

corrosion

c)

fire spread

d)

electrocution

42.

Foam fire extinguishers can be used on live electrical equipment.

a)

True

b)

False

43.

Which class of fire is a RED (WATER) fire extinguisher used for?

a)

A

b)

B

c)

Elec

d)

A & B

44.

A BLACK fire extinguisher contains _______.

a)

CO₂

b)

Water

c)

Foam

d)

Powder

45.

Which fire extinguisher is suitable for electrical fires?

a)

RED (WATER)

b)

CREAM (FOAM)

c)

BLUE (POWDER)

d)

BLACK (CO₂)

46.

The CREAM fire extinguisher is used for which classes of fire?

a)

A

b)

B

c)

A & B

d)

Elec

47.

What type of extinguisher should you carry when soldering?

a)

A dry powder or CO₂ extinguisher

b)

A water extinguisher

c)

A foam extinguisher

d)

A wet chemical extinguisher

48.

What should you use next to building fabrics when soldering?

a)

A heatproof mat

b)

A plastic sheet

c)

A wooden board

d)

A paper towel

e)

A rubber mat

49.

What should you do with furniture before soldering?

a)

Move furniture away from soldering area

b)

Cover furniture with a wet cloth

c)

Paint the furniture

d)

Polish the furniture

50.

Fires: Should you point a blowtorch directly at combustible material?

a)

True

b)

False

51.

When soldering under a suspended floor, what should you check for?

a)

Anything that could catch fire

b)

Loose floorboards

c)

Electrical outlets

d)

Water pipes

52.

Fires: Should you replace floorboards before inspecting for smouldering under the boards?

a)

True

b)

False

53.

What should you do to the substrate when lead welding on a roof?

a)

Damp off the substrate

b)

Heat the substrate until it glows

c)

Apply oil to the substrate

d)

Paint the substrate with primer

54.

Fires: How long before you leave should you stop soldering?

a)

An hour before you leave

b)

Five minutes before you leave

c)

Right before you leave

d)

Thirty minutes before you leave

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