Power Plant Safety Flashcards

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

Answer: Lockout/Tagout (LOTO)

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

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

Answer: To verify atmospheric testing and rescue provisions before entry

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

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

Answer: Evacuate the area and report it through proper channels

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

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

Answer: Oxygen displacement by nitrogen

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

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

Answer: Energized electrical equipment

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

Why must hearing protection be worn in turbine and pump halls?

Answer: Because sustained high noise levels can cause permanent hearing loss

Rotating equipment produces noise above safe exposure limits, leading to irreversible hearing damage over time.

What is the main reason for grounding electrical equipment in a power plant?

Answer: To provide a safe path for fault current and prevent shock

Grounding directs fault current safely to earth, reducing the risk of electric shock and equipment damage.