Rail Vikas Nigam Electrical Engineer Interview Questions, Process, and Tips

Cable trays in tunnels are installed to support and protect electrical cables.

• Plan the cable tray route considering the tunnel layout and cable requirements.

• Ensure proper clearance and separation from other services in the tunnel.

• Select appropriate cable tray materials based on environmental conditions.

• Install cable tray supports securely to the tunnel walls or ceiling.

• Lay the cables in the cable tray, ensuring proper ...read more

Various tests are conducted in electrical panels to ensure their functionality and safety.

• Insulation resistance test to check for any leakage or faults

• Continuity test to ensure proper electrical connections

• Functional test to verify the operation of switches, relays, and indicators

• Overload test to assess the panel's capacity to handle excessive current

• Grounding test to ensure proper grounding and protection against elec...read more

A control diagram of a starter is a graphical representation of the electrical connections and components used to start a motor.

• A control diagram typically includes symbols for the motor, power supply, switches, relays, and other control devices.

• It shows the sequence of operation and the interconnections between different components.

• For example, a control diagram for a motor starter may include a start button, stop but...read more

Glands are used to provide a secure and watertight seal in electrical systems. Voltage drop occurs due to resistance in the electrical circuit.

• Glands are used to prevent the entry of dust, moisture, and other contaminants into electrical enclosures or equipment.

• They provide a secure and watertight seal around cables or wires, ensuring the safety and reliability of the electrical system.

• Glands are commonly used in outdo...read more

Dewatering ventilation contro pollution remove air pollution

Overload calculation involves determining the maximum load that a system can handle without causing damage or failure.

• Overload calculation is important in electrical engineering to ensure the safety and efficiency of electrical systems.

• It involves analyzing the power consumption of various components and determining if they exceed the system's capacity.

• Factors to consider include the rated power of devices, the duratio...read more