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Lesson: Compressed Gases

Worksheet • 7 Questions

Q1:

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

  • ASteel-toe-capped boots
  • BSafety helmet
  • CInsulated gloves
  • DLab coat
  • EFace shield

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.
  • A3, 2, 1
  • B2, 3, 1
  • C3, 1, 2
  • D2, 1, 3
  • E1, 2, 3

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.
  • A3, 1, 2
  • B2, 1, 3
  • C3, 2, 1
  • D1, 3, 2
  • E1, 2, 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, 2, 3
  • B3, 2, 1
  • C2, 1, 3
  • D2, 3, 1
  • E1, 3, 2

Q5:

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

  • AHydrogen
  • BArgon
  • COxygen
  • DCarbon dioxide
  • ENitrogen

Q6:

Which of the following statements is true?

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

Q7:

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

  • ACarbon dioxide
  • BAcetylene
  • COxygen
  • DHydrogen
  • EMethane
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