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Worksheet: Compressed Gases

Q1:

Which of the following items of clothing must be worn when moving a gas cylinder?

  • AFace shield
  • BInsulated gloves
  • CLab coat
  • DSteel-toe-capped boots
  • ESafety helmet

Q2:

Before disconnecting a regulator from a gas cylinder, in which order should the following actions be performed?

  1. Loosen the connection between the regulator and cylinder.
  2. Turn the regulator knob counter-clockwise.
  3. Close the cylinder outlet valve.
  • A1, 2, 3
  • B3, 1, 2
  • C2, 1, 3
  • D3, 2, 1
  • E2, 3, 1

Q3:

After connecting a regulator to a gas supply, in which order should the following actions be performed?

  1. Check the cylinder outlet for leaks.
  2. Turn the regulator knob clockwise.
  3. Open the cylinder outlet valve.
  • A1, 2, 3
  • B3, 2, 1
  • C1, 3, 2
  • D3, 1, 2
  • E2, 1, 3

Q4:

When transferring a regulator between gas cylinders, in which order should the following actions be performed?

  1. Turn the regulator knob fully counter-clockwise.
  2. Attach the regulator.
  3. Open the cylinder outlet valve.
  • A1, 3, 2
  • B2, 1, 3
  • C2, 3, 1
  • D1, 2, 3
  • E3, 2, 1

Q5:

A cylinder outlet has a left-hand thread. Which of the following gases could it contain?

  • ANitrogen
  • BOxygen
  • CCarbon dioxide
  • DHydrogen
  • EArgon

Q6:

Which of the following statements is true?

  • AThe nut of a regulator must be tightened as much as possible when attaching it to a cylinder.
  • BAn acetylene cylinder outlet has a right-hand thread.
  • CA cylinder outlet valve is opened by turning clockwise.
  • DA regulator outlet valve is closed by turning the knob counter-clockwise.
  • EIt is safe to use a nitrogen regulator on an oxygen cylinder.

Q7:

Which of the following gas cylinders can always be used without a flashback arrestor?

  • AMethane
  • BOxygen
  • CHydrogen
  • DCarbon dioxide
  • EAcetylene