Wheels Maintenance Engineer Interview Questions, Process, and Tips

Diploma in Electrical Engineering and father and mother

Transformers work on the principle of electromagnetic induction to transfer electrical energy between two or more circuits.

• Transformers have two coils of wire, known as primary and secondary coils.

• When an alternating current flows through the primary coil, it creates a changing magnetic field.

• This changing magnetic field induces a voltage in the secondary coil, transferring electrical energy.

• Transformers can step up or...read more

RCCB is a Residual Current Circuit Breaker that trips when it detects a leakage current, while MCB is a Miniature Circuit Breaker that trips when there is an overload or short circuit.

• RCCB protects against electric shock by detecting imbalance in current flow, commonly used in wet areas like bathrooms.

• MCB protects against overloads and short circuits, commonly used in residential and commercial buildings.

• RCCB has a sen...read more

P=√3 vi cos¢ 1 ho=746 Watt Full load current in 30 amp

Vccb stands for Vacuum Circuit Breaker. It works on the principle of extinguishing the arc in a vacuum environment.

• VCCB uses a vacuum as the arc quenching medium instead of air or oil.

• When the contacts of the breaker open, the arc is drawn into the vacuum and extinguished.

• This method ensures faster arc extinction and reduces the risk of fire hazards.

• VCCBs are commonly used in high voltage applications where quick and r

Miniature Circuit Breakers (MCBs) and relays are commonly used in electrical systems for protection and control.

• MCBs are used to protect electrical circuits from overloads and short circuits by automatically switching off the circuit when a fault is detected.

• Relays are used to control the operation of electrical circuits by opening or closing contacts based on input signals.

• Common types of MCBs include single-pole, dou...read more