Equate Petrochemical Mechanical Supervisor Interview Questions and Answers

The motor is a device that converts electrical energy into mechanical energy to perform work.

• A motor consists of a rotor and a stator, with the rotor rotating inside the stator.

• Motors can be AC (alternating current) or DC (direct current) depending on the type of power source.

• Common types of motors include induction motors, synchronous motors, and brushed or brushless DC motors.

• Motors are used in various applications s...read more

Power system can be powered using various sources such as electricity from the grid, generators, solar panels, or batteries.

• Power system can be connected to the grid to receive electricity from a utility company.

• Generators can be used as a backup power source in case of outages or in remote locations.

• Solar panels can be installed to harness energy from the sun and power the system.

• Batteries can store excess energy for ...read more

Cavitation is the formation of vapor bubbles in a centrifugal pump due to low pressure. NPSH stands for Net Positive Suction Head.

• Cavitation occurs when the pressure at the pump inlet drops below the vapor pressure of the liquid, causing the formation of vapor bubbles.

• These vapor bubbles collapse when they reach higher pressure areas, leading to damage to the pump impeller and reduced pump performance.

• Cavitation can be...read more

Surging is a phenomenon in rotating equipment where the flow rate becomes unstable.

• Surging occurs when the flow rate through a rotating equipment fluctuates due to changes in operating conditions.

• It can lead to reduced efficiency, increased wear and tear, and potential damage to the equipment.

• To manage lubrication in different rotating equipment, it is important to monitor and control the flow rate, viscosity, and temp...read more