Question 1

According to OSHA, what is the minimum depth at which a trench must be protected by a protective system such as shoring, sloping, or trench boxes?

Accepted Answer

Any trench 5 feet or deeper must have a protective system in place. Trenches less than 5 feet may also require protection if the competent person determines hazardous conditions exist.

Question 2

What does the OSHA Hazard Communication Standard (HazCom) require employers to provide workers for each hazardous chemical in the workplace?

Accepted Answer

Employers must provide a Safety Data Sheet (SDS) for each hazardous chemical. SDSs detail chemical properties, health hazards, protective measures, and emergency procedures.

Question 3

When working in a confined space classified as a 'permit-required confined space,' what must be completed before any worker enters?

Accepted Answer

A written entry permit must be completed and signed by the entry supervisor. The permit verifies that all testing, equipment, and safety procedures are in place before entry.

Question 4

What is the OSHA-required minimum distance that a ladder must extend above the upper landing surface when used for access to a roof or elevated platform?

Accepted Answer

The ladder must extend at least 3 feet above the upper landing surface. This provides a safe handhold for workers transitioning on and off the ladder.

Question 5

Under OSHA's lockout/tagout (LOTO) standard, what must a plumber do before servicing or maintaining equipment that could unexpectedly energize?

Accepted Answer

The plumber must isolate all energy sources and apply a personal lockout or tagout device to prevent re-energization. All stored energy must also be released or restrained before work begins.

Plumber Journeyman Exam: Safety & Tools

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