Power Plant Safety Flashcards

What is the main purpose of a plant emergency evacuation drill?

Answer: To ensure workers know routes, assembly points, and procedures

Drills familiarize workers with evacuation routes, assembly points, and roles so they respond effectively in a real emergency.

Which condition makes an atmosphere immediately dangerous to life and health (IDLH)?

Answer: A concentration of contaminant that threatens life or causes irreversible harm

An IDLH atmosphere poses an immediate threat to life or causes permanent health effects, requiring supplied-air respiratory protection.

What is the purpose of a guard on a coupling between a motor and pump?

Answer: To prevent contact with rotating parts that can cause entanglement

Coupling guards block access to rotating shafts that could entangle clothing, hair, or limbs.

Why should oily rags be stored in a closed metal container?

Answer: To prevent spontaneous combustion from oxidation heat

Oil-soaked rags can self-heat through oxidation and ignite, so a closed metal container limits oxygen and contains any fire.

What is the correct procedure when a gas detector alarms for a combustible gas leak?

Answer: Stop ignition sources, evacuate, and ventilate per procedure

Removing ignition sources, evacuating, and ventilating prevents a flammable atmosphere from igniting.

What is the role of a coal dust explosion prevention program?

Answer: To control accumulated dust that can ignite and explode

Accumulated coal dust is explosive, so housekeeping and dust control reduce the risk of a deflagration.

Why is two-way radio communication maintained between control room and field operators during switching operations?

Answer: To coordinate actions and confirm equipment status safely

Continuous communication ensures switching steps are coordinated and equipment status is confirmed before acting, preventing errors.