Master Plumber Exam Jobsite Safety and Regulations 4

Question 1

What OSHA standard specifically governs excavation and trenching safety for plumbing contractors?

Accepted Answer

29 CFR 1926.650-652

Answer

OSHA 29 CFR 1926 Subpart P (sections 650-652) specifically covers excavations and trenching safety requirements in construction.

Question 2

A master plumber notices a 'competent person' has not inspected a trench after a rainstorm. What should happen BEFORE workers re-enter?

Accepted Answer

A competent person must re-inspect and approve re-entry

Answer

OSHA requires a competent person to inspect excavations after rain or other hazard-increasing events before workers are permitted to re-enter.

Question 3

Which personal protective equipment is required when operating a pipe threading machine?

Accepted Answer

Safety glasses and cut-resistant gloves

Answer

Safety glasses protect against metal chips and cutting fluid splatter, while cut-resistant gloves protect hands from sharp pipe threads and the cutting die during pipe threading.

Question 4

Under the National Electrical Code (NEC) and plumbing safety practice, a plumber bonding a gas line must ensure the bonding jumper is sized to handle what?

Accepted Answer

The fault current that could flow through it

Answer

Bonding jumpers on gas piping must be sized to carry the maximum fault current that could flow in the event of an electrical fault contacting the pipe.

Question 5

A plumber is cutting cast iron pipe with a grinder. What respiratory protection is required for crystalline silica dust exposure?

Accepted Answer

N95 filtering facepiece respirator

Answer

OSHA's silica standard (29 CFR 1926.1153) requires at minimum an N95 respirator when cutting materials that generate respirable crystalline silica dust.

Master Plumber Exam Practice Test

Master Plumber Exam Practice Test

Master Plumber Exam Jobsite Safety and Regulations 4