Lesson Worksheet: Compressed Gases Chemistry • 10th Grade
In this worksheet, we will practice describing compressed gas cylinders and regulators and safe procedures for their use, transport, and replacement.
Q1:
Which of the following gas cylinders can always be used without a flashback arrestor?
- ACarbon dioxide
- BHydrogen
- COxygen
- DAcetylene
- EMethane
Q2:
A cylinder outlet has a left-hand thread. Which of the following gases could it contain?
- AHydrogen
- BNitrogen
- COxygen
- DCarbon dioxide
- EArgon
Q3:
Which of the following statements is true?
- AAn acetylene cylinder outlet has a right-hand thread.
- BA cylinder valve outlet is opened by turning it clockwise.
- CA regulator outlet valve is closed by turning the knob counterclockwise.
- DThe nut of a regulator must be tightened as much as possible when attaching it to a cylinder.
Q4:
After connecting a regulator to a gas supply, in which order should the following actions be performed?
- Checking the cylinder outlet for leaks
- Turning the regulator knob clockwise
- Opening the cylinder outlet valve
- A
- B
- C
- D
- E
Q5:
Before disconnecting a regulator from a gas cylinder, in which order should the following actions be performed?
- Loosening the connection between the regulator and cylinder
- Turning the regulator knob counterclockwise
- Closing the cylinder outlet valve
- A
- B
- C
- D
- E
Q6:
When transferring a regulator between gas cylinders, in which order should the following actions be performed?
- Turn the regulator knob fully counterclockwise.
- Attach the regulator.
- Open the cylinder valve outlet.
- A2, 1, 3
- B1, 2, 3
- C1, 3, 2
- D2, 3, 1
- E3, 2, 1
Q7:
Which of the following items of clothing must be worn when moving a gas cylinder?
- ASteel-toe boots
- BSafety helmet
- CFace shield
- DLab coat
- EInsulated gloves
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