Handling and Storage of Gases

Question 1

Portable gas cylinder capacity
a) must take into account liquid expansion due to
temperature change
b) is expressed by the tare weight stamped on the cylinder
c) is a function of the pressure within the unit at ambient
temperature
d) can be reduced after an inspection
e) may be increased on approval from the DOT or CTC

Answer 1

a) must take into account liquid expansion due to

temperature change

Question 2

The serial number of a cylinder cannot be duplicated and is
registered and maintained by the
a) Department of Transport
b) Canadian Transport Commission
c) Boilers and Pressure Vessels Committee
d) Bureau of Explosives
e) Canadian Standards Association

Answer 2

d) Bureau of Explosives

Question 3

The most easily damaged part of the gas container is the

a) foot ring
b) valve cap
c) safety valve
d) cylinder valve
e) regulator

Answer 3

d) cylinder valve

Question 4

Gas cylinder valves are normally constructed of

a) cast iron
b) brass
c) stainless steel
d) bronze
e) the same material as the cylinder

Answer 4

b) brass

Question 5

Before disconnecting an empty cylinder from a manifold
system
a) close the cylinder valve to prevent air entering the
cylinder
b) obtain a “buddy” to ensure your safety
c) check the area for gases with an analyzer
d) unchain the cylinder
e) crack the connecting joint in order to purge it of excess
gases

Answer 5

a) close the cylinder valve to prevent air entering the

cylinder

Question 6

Gas cylinders should be stored upright in order to

a) minimize space requirements
b) avoid liquefied product from escaping
c) keep them from rolling during transportation
d) lessen the chance of back injury during movement
e) enhance proper identification

Answer 6

b) avoid liquefied product from escaping

Question 7

In order to prevent the formation of explosive mixtures,
oxygen and acetylene cylinders should be
a) stored in different buildings
b) stored at least 10 metres apart
c) stored in different confinements within a building
d) kept segregated at all times
e) stored at least 6 metres apart

Answer 7

e) stored at least 6 metres apart

Question 8

Gas cylinders shall not be placed below ground level except
with permission from the
a) Canadian Transport Commission
b) Department of Transport
c) Boilers and Pressure Vessels Committee
d) Bureau of Explosives
e) Canadian Standards Association

Answer 8

e) Canadian Standards Association

Question 9

Gas cylinders are usually stored

a) inside, close to its consuming equipment
b) in a well heated room
c) with all fittings lightly oiled or greased
d) below ground level
e) upright and firmly secured

Answer 9

e) upright and firmly secured

Question 10

Oxygen and acetylene cylinders should be stored

a) in a warm dry place
b) together whenever possible
c) at least 3 metres apart
d) at least 6 metres apart
e) inside the building next to the consuming equipment

Answer 10

d) at least 6 metres apart

Question 11

A cylinder valve cap
a) will prevent gas from escaping should the cylinder valve
leak
b) must be in place when the tare weight is being measured
c) threads must never be lubricated
d) prevents the cylinder valve from damage
e) will prevent the cylinder valve from breaking off should
the cylinder fall over

Answer 11

d) prevents the cylinder valve from damage

Question 12

A cylinder foot ring
a) is installed on the cylinder to permit “foot rolling” of
the cylinder
b) has a diameter 1.5 times the cylinder diameter
c) prevents the cylinder from being stored horizontally
d) protects the bottom and lower section of the cylinder
e) is removed during transportation

Answer 12

d) protects the bottom and lower section of the cylinder

Question 13

Top guard rings are used in place of

a) vapour values
b) pressure relief valves
c) cylinder valve caps
d) regulators
e) foot rings

Answer 13

c) cylinder valve caps

Question 14

Gas cylinder vapour valves only allow product flow

a) if the pressure rises above the maximum allowable amount
b) when a hose is connected
c) when the vapour pressure drops
d) in one single direction
e) in extreme emergency cases

Answer 14

b) when a hose is connected

Question 15

Cylinders deformed by fire are usually

a) destroyed
b) cleaned and re-painted before returning for use
c) repaired and returned to service
d) repressurized and returned for use
e) cleaned, pressure tested, and then returned to service

Answer 15

a) destroyed

Question 16

The most frequent and common method of cylinder inspection
a) does not involve record-keeping
b) is the visual inspection by a qualified person
c) involves pressurizing the cylinder to twice its working
pressure
d) will not result in the cylinder being destroyed or
confiscated
e) is the hydrostatic test

Answer 16

b) is the visual inspection by a qualified person

Question 17

A gas cylinder hydrostatic test will
a) result in a new test date being stamped on the cylinder
b) mean the cylinder is subjected to a pressure of twice its
maximum allowable working value
c) mean the cylinder is subjected to a pressure of one and
one half times its working pressure
d) remove any dents the cylinder may contain
e) indicate whether or not the unit was exposed to very high
temperatures

Answer 17

a) result in a new test date being stamped on the cylinder

Question 18

Leak tests on cylinder connections should be done with

a) a sulphur candle
b) a halide lamp
c) a soap solution
d) a litmus solution
e) a dye penetrant test

Answer 18

c) a soap solution

Question 19

When a gas cylinder is filled with water and pressurized to
twice its working pressure, the test conducted is known as a
a) hydrostatic test
b) dead weight test
c) tensile test
d) water jacket test
e) relief valve test

Answer 19

a) hydrostatic test

Question 20

Gas cylinders that have been filled with liquid, immersed in
water, and pressurized to two times the working pressure are
said to have been subjected to a
a) hydrostatic test
b) dead weight test
c) relief valve test
d) tensile test
e) water jacket test

Answer 20

e) water jacket test