Nesma & Partners Electrical Supervisor Interview Questions and Answers

A.C to D.C. conversion can be done using a rectifier circuit.

• A rectifier circuit can be used to convert A.C. to D.C.

• The rectifier circuit can be half-wave or full-wave.

• Half-wave rectifier only allows half of the A.C. wave to pass through, while full-wave rectifier allows the entire wave.

• The rectifier circuit can be made using diodes.

• The output of the rectifier circuit is not smooth and requires filtering using capacito...read more

The cable laying process involves planning, trenching, installation, and testing for effective electrical distribution.

• Planning: Assess the route and determine cable type based on load requirements.

• Trenching: Excavate the ground to lay cables, ensuring proper depth and width.

• Installation: Place cables in trenches, using protective conduits if necessary.

• Backfilling: Cover the cables with soil, ensuring no sharp objects ...read more

LEL stands for Lower Explosive Limit, which is the minimum concentration of a gas or vapor in air that will ignite if a source of ignition is present.

• LEL is used to determine the potential for a fire or explosion in a confined space.

• Procedures for LEL testing involve using gas detection equipment to measure the concentration of a specific gas in the air.

• If the LEL of a gas is exceeded, it indicates a potentially hazard...read more

Control of confined spaces is essential for ensuring the safety of workers in potentially hazardous environments.

• Implementing a permit-to-work system to control access to confined spaces

• Conducting thorough risk assessments before entry

• Providing appropriate training for workers on confined space entry procedures

• Using gas detectors and ventilation systems to monitor and control atmospheric conditions

• Having a rescue plan