Master Plumber Exam Jobsite Safety and Regulations 3

Question 1

What is the maximum allowable noise exposure for a worker without hearing protection under OSHA standards for an 8-hour workday?

Accepted Answer

90 dBA

Answer

OSHA's permissible exposure limit (PEL) for noise is 90 dBA as an 8-hour time-weighted average without hearing protection.

Question 2

A plumber discovers that a ladder extends only 1 foot above a roof access point. What is the OSHA violation?

Accepted Answer

The ladder must extend at least 3 feet above the landing

Answer

OSHA 1926.1053 requires portable ladders used to access an upper landing surface to extend at least 3 feet above the landing.

Question 3

Under the OSHA permit-required confined space standard, who is responsible for authorizing entry into a permit space?

Accepted Answer

The entry supervisor

Answer

The entry supervisor is responsible for verifying that conditions are acceptable and authorizing entry into a permit-required confined space.

Question 4

Which class of fire extinguisher is appropriate for electrical equipment fires on a plumbing jobsite?

Accepted Answer

Class C

Answer

Class C fire extinguishers are rated for electrical fires because they use non-conductive agents that won't conduct electricity back to the user.

Question 5

When using a powder-actuated tool to fasten pipe supports to concrete, workers within what radius must wear eye and face protection?

Accepted Answer

10 feet

Answer

OSHA requires all workers within 10 feet of powder-actuated tool operations to wear appropriate eye and face protection.

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