09 - General Process safety Hazards

Front

What are the hazards when using inert gas?

Back

Asphyxiation due to displacement of oxygen

Answer explanation

Inert gases can displace oxygen in the air, leading to asphyxiation. This is a significant hazard, as it can occur without warning, making it crucial to monitor oxygen levels in environments where inert gases are used.

Front

What is a pyrophoric material?

Back

A material that burns spontaneously in the presence of air.

Answer explanation

A pyrophoric material ignites spontaneously in air without an external spark. This distinguishes it from materials that require a spark to ignite or are non-flammable, making the correct choice the one that describes spontaneous combustion.

Front

What is reverse over-speed in a centrifugal pump?

Back

When a pump spins in the opposite direction at a speed exceeding normal operating speed

Answer explanation

Reverse over-speed occurs when a centrifugal pump rotates in the opposite direction at a speed that exceeds its normal operating speed, which can lead to mechanical failure or damage.

Front

What should be done to the source of energy in case of pump reverse rotation?

Back

Isolate the source of energy and shut down the pump remotely

Answer explanation

In case of pump reverse rotation, it is crucial to isolate the energy source and shut down the pump remotely to prevent damage and ensure safety. Continuing operation or adjusting energy supply could lead to hazardous situations.