Plant Operations Engineer Interview Questions and Answers

Power is the rate at which work is done or energy is transferred in an electrical system.

• Power is measured in watts (W) and calculated using the formula P = V x I, where P is power, V is voltage, and I is current.

• In single phase systems, power can be calculated using P = V x I, where V is the line voltage and I is the current.

• In 3 phase systems, power can be calculated using P = √3 x V x I, where V is the line voltage and I is the current.

• In star configuration, the line volta...read more

Voltage is the electrical potential difference between two points, measured in volts. Current is the flow of electric charge, measured in amperes.

• Voltage is the electrical potential difference between two points, measured in volts. It is typically measured using a voltmeter.

• Current is the flow of electric charge, measured in amperes. It is typically measured using an ammeter.

• The size of a cable is determined by its current-carrying capacity, which is influenced by factors suc...read more

PLC stands for Programmable Logic Controller, used in automation to control machinery. VFD is Variable Frequency Drive, used to control motor speed.

• PLC is a digital computer used for automation of electromechanical processes.

• PLC can be programmed to perform a variety of tasks such as controlling machinery, processes, and more.

• VFD is a type of motor controller that drives an electric motor by varying the frequency and voltage supplied to the motor.

• VFDs are commonly used in HVA...read more