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I applied via Walk-in and was interviewed in Nov 2023. There were 2 interview rounds.
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 ...
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...
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...
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...
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...
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posted on 10 Sep 2015
I applied via PLACEMENT
posted on 10 Sep 2017
I was interviewed before Sep 2016.
posted on 12 May 2018
A multimeter is an electronic device used to measure voltage, current, and resistance in electrical circuits.
It can measure AC and DC voltage
It can measure AC and DC current
It can measure resistance
It can also measure other electrical parameters such as capacitance and frequency
It typically has a digital display for easy reading
Examples of multimeter brands include Fluke, Klein Tools, and Extech
I applied via Referral and was interviewed in Oct 2020. There were 3 interview rounds.
posted on 14 Jul 2021
posted on 21 Dec 2021
I applied via Campus Placement and was interviewed before Dec 2020. There was 1 interview round.
The question covers power factor of transformer, types of DC machine, working principle of AC alternator, and DC motors.
Power factor of a transformer is the ratio of real power to apparent power.
Types of DC machines include DC motors and DC generators.
AC alternators work on the principle of electromagnetic induction to convert mechanical energy into electrical energy.
DC motors convert electrical energy into mechanical ...
I applied via Campus Placement and was interviewed before Jun 2021. There were 2 interview rounds.
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Power Grid Corporation of India