MASS Power Plant Safety 2

Question 1

Before performing maintenance on a steam turbine, which procedure ensures the equipment cannot be accidentally energized?

Accepted Answer

Lockout/Tagout (LOTO)

Answer

Lockout/Tagout physically locks and tags energy isolation points so equipment cannot be re-energized during servicing.

Question 2

What is the primary purpose of a confined space entry permit in a power plant?

Accepted Answer

To verify atmospheric testing and rescue provisions before entry

Answer

The permit confirms the space has been tested for hazardous atmospheres and that rescue and ventilation measures are in place.

Question 3

A worker notices steam escaping from a high-pressure line joint. What is the correct first action?

Accepted Answer

Evacuate the area and report it through proper channels

Answer

High-pressure steam can cause severe burns, so personnel should leave the area and report the hazard for controlled isolation.

Question 4

Which gas is the primary asphyxiation concern when entering a nitrogen-purged vessel?

Accepted Answer

Oxygen displacement by nitrogen

Answer

Nitrogen displaces oxygen, creating an oxygen-deficient atmosphere that can cause rapid unconsciousness.

Question 5

What does a Class C fire extinguisher rating indicate it is suitable for?

Accepted Answer

Energized electrical equipment

Answer

Class C extinguishers are rated for fires involving energized electrical equipment using non-conductive agents.

MASS Test Practice Test