G60 Equipment Inspection and Maintenance 1 — Questions and Answers
Question 1: Before using a torch, what must you inspect on the hoses?
- Check for cracks, cuts, abrasions, and leaks (Correct answer)
- Only check the color coding
- Inspect the torch tip only
- Verify the hose length
Correct answer: Check for cracks, cuts, abrasions, and leaks
Hoses must be inspected for physical damage including cracks, cuts, abrasions, and any signs of leaks before each use.
Question 2: How often should torch equipment be formally inspected by a qualified person under NYC fire code?
- At least annually (Correct answer)
- Every five years
- Only when visibly damaged
- Every three years
Correct answer: At least annually
NYC fire code requires that torch equipment used with flammable gases be formally inspected by a qualified person at least annually.
Question 3: What does a green hose indicate on an oxy-fuel torch setup?
- Oxygen hose (Correct answer)
- Fuel gas hose
- Inert gas hose
- Water cooling hose
Correct answer: Oxygen hose
Green hoses are the standard color code for oxygen in oxy-fuel torch systems to prevent dangerous mix-ups with fuel gas hoses.
Question 4: What is the correct action if a regulator diaphragm shows signs of wear or damage?
- Remove it from service and replace it before use (Correct answer)
- Continue use until the next scheduled maintenance
- Apply sealant to the damaged area
- Reduce operating pressure to compensate
Correct answer: Remove it from service and replace it before use
A damaged regulator diaphragm must be immediately removed from service and replaced, as it can cause inaccurate pressure control and leaks.
Question 5: Which component prevents oxygen from flowing back into the fuel gas hose?
- Check valve (non-return valve) (Correct answer)
- Pressure regulator
- Needle valve
- Flashback arrestor only
Correct answer: Check valve (non-return valve)
Check valves, also called non-return valves, are installed to prevent reverse flow of gases between the oxygen and fuel lines.
Question 6: What is the proper method to test a hose connection for leaks?
- Apply an approved leak-detection solution and look for bubbles (Correct answer)
- Use an open flame to detect escaping gas
- Listen carefully for hissing sounds only
- Increase pressure and check for pressure drop on gauge
Correct answer: Apply an approved leak-detection solution and look for bubbles
An approved leak-detection solution applied to connections will produce visible bubbles if gas is escaping — never use an open flame to check for leaks.
G60 Equipment Inspection and Maintenance 1
Before using a torch, what must you inspect on the hoses?