Pipefitter Safety Considerations 4

Question 1

When working in a confined space with potential oxygen deficiency, what is the minimum acceptable oxygen level for safe entry?

Accepted Answer

19.5%

Answer

OSHA requires a minimum of 19.5% oxygen in confined spaces before entry is permitted without supplied-air respirators.

Question 2

A pipefitter notices steam escaping from a pinhole leak in a high-pressure line during operations. What is the correct immediate action?

Accepted Answer

Report the leak to the supervisor and isolate the area

Answer

High-pressure steam leaks are extremely dangerous and the area must be isolated immediately while the hazard is reported to supervision.

Question 3

Which document must be completed before a pipefitter begins hot work such as welding near flammable materials?

Accepted Answer

Hot Work Permit

Answer

A Hot Work Permit is required before performing welding, cutting, or grinding near flammable or combustible materials.

Question 4

What is the purpose of a fire watch during hot work operations?

Accepted Answer

To monitor for fire and extinguish sparks for at least 30 minutes after work stops

Answer

A fire watch must remain on duty during hot work and for at least 30 minutes afterward to catch any smoldering materials.

Question 5

When using a chain fall (chain hoist) to lift a pipe section, what must be verified before lifting?

Accepted Answer

The rated capacity of the chain fall meets or exceeds the load weight

Answer

The working load limit (WLL) of the chain fall must meet or exceed the weight of the load to prevent catastrophic failure.

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