Nilkamal Trainee Operating Engineer Interview Questions and Answers

A transformer is an electrical device that transfers electrical energy between two or more circuits through electromagnetic induction.

• Transformers are used to increase or decrease voltage levels in electrical power transmission.

• They consist of primary and secondary coils wound around a core made of ferromagnetic material.

• Step-up transformers increase voltage for long-distance transmission, while step-down transformers ...read more

KVL stands for Kirchhoff's Voltage Law and KCL stands for Kirchhoff's Current Law.

• KVL states that the sum of voltages around any closed loop in a circuit must be zero.

• KCL states that the algebraic sum of currents entering and leaving a node in a circuit must be zero.

• These laws are fundamental principles in circuit analysis and are used to solve complex electrical circuits.

• KVL and KCL are based on the conservation of en

VFD stands for Variable Frequency Drive, used to control the speed of an AC motor by varying the frequency and voltage supplied to the motor.

• VFDs are commonly used in industrial applications to control the speed of pumps, fans, compressors, and conveyor systems.

• They help in saving energy by adjusting the motor speed to match the actual load requirements.

• VFDs can improve process control, reduce maintenance costs, and ex...read more

CT - Current Transformer, PT - Potential Transformer

• CT is used to measure alternating current, while PT is used to measure voltage

• CT steps down current to a safe level for measurement, PT steps down voltage for measurement

• CT is commonly used in power systems for protection and metering, PT is used for metering and control purposes