NMDC Limited Technician Apprentice Interview Questions and Answers

Hard work versus smart work.

Q1. Why power plug earth wire is bigger in size?
Ans. 
The power plug earth wire is bigger in size to ensure safety and prevent electrical shocks.
• The earth wire provides a path for the current to flow in case of a fault or short circuit.

• A larger wire size reduces resistance and allows for the safe dissipation of excess current.

• It helps to protect individuals and equipment from electric shock hazards.

• The earth wire is connected to the ground, which acts as a reference point...read more
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Q2. Which conductor of same size will take larger current Al or Cu?
Ans. 
Copper (Cu) conductor will take larger current than Aluminum (Al) conductor of the same size.
• Copper has a higher electrical conductivity than Aluminum.

• Copper has a lower resistivity than Aluminum.

• Copper has better thermal conductivity than Aluminum.

• Copper is more commonly used in high-current applications.

• Aluminum is often used in overhead power transmission lines due to its lighter weight.
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Q3. What is pulse width modulation in VFD?
Ans. 
Pulse width modulation (PWM) is a technique used in VFD to control the speed of the motor by adjusting the width of the pulses of voltage supplied to the motor.
• PWM is a method of controlling the amount of power delivered to a load without changing the voltage level.

• In VFD, PWM is used to control the speed of the motor by varying the width of the pulses of voltage supplied to the motor.

• The width of the pulses is control...read more
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Q1. Mechanical HEMM Hydraulic and final driver running mantnsh
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Q2. Cool mince workshop
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Q1. HEMM technical iti
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Q1. About Technical Questions
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Q2. Bearing,valves,pumps, cylinders,motors, gauging, alignment etc
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Q1. Electrical Job Specification
Ans. 
Electrical engineers design, develop, test, and supervise the manufacturing of electrical equipment.
• Design electrical systems and products

• Test equipment and troubleshoot issues

• Supervise the manufacturing process

• Stay up-to-date with industry trends and advancements
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Q2. Relay setting, transformer details, vfd parameter setting.
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Q1. I am working from Grid sub station . Transformer... CT PT CVT EARTHING PTW
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Q2. All about 132 kv Gss
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Q1. All simple basics from your education related questions
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Q2. What's the principle of f.left hand theoram
Ans. 
F.left hand theorem states that the magnetic field around a current-carrying conductor can be determined using the left hand rule.
• States that if the thumb, forefinger, and middle finger of the left hand are extended at right angles to each other, with the forefinger pointing in the direction of the current, the thumb in the direction of the magnetic field, then the middle finger points in the direction of the force exp...read more
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Q3. Related ur experience some data
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Q4. What's the basic for hydraulic
Ans. 
Hydraulics is a branch of engineering that focuses on the mechanical properties of liquids.
• Hydraulics deals with the transmission of force through the use of liquids.

• It involves the study of fluid dynamics and how fluids behave under pressure.

• Hydraulic systems are commonly used in various applications such as heavy machinery, aircraft control systems, and automotive brakes.
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