Welspun Corp NDT Technician Interview Questions and Answers

Q1. What is the working principle of an overload relay?
Ans. 
An overload relay works by monitoring the current flowing through a motor and tripping when the current exceeds a set limit.
• Monitors the current flowing through a motor

• Trips and interrupts power when current exceeds a set limit

• Protects the motor from damage due to overloading

• Can be reset manually after tripping
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Q2. How is insulation resistance measured?
Ans. 
Insulation resistance is measured using a megohmmeter to apply a high voltage and measure the resistance of the insulation material.
• Use a megohmmeter to apply a high voltage to the insulation material

• Measure the resistance of the insulation material to determine its insulation resistance

• Insulation resistance is typically measured in megaohms (MΩ)

• Regular insulation resistance testing helps prevent electrical failures an
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Q1. How to face Electrical safety
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Electrical safety can be ensured by following proper procedures, using appropriate equipment, and staying vigilant.
• Always use insulated tools when working on live circuits

• Ensure circuits are de-energized before working on them

• Wear appropriate personal protective equipment (PPE) such as gloves and goggles

• Regularly inspect and maintain electrical equipment to prevent malfunctions

• Follow safety guidelines and procedures ou
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Q2. What is the process for performing preventive maintenance on a motor?
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Preventive maintenance on a motor involves inspecting, cleaning, lubricating, and testing the motor to ensure optimal performance and prevent breakdowns.
• Inspect the motor for any signs of wear or damage

• Clean the motor and its components to remove dirt and debris

• Lubricate moving parts to reduce friction and wear

• Test the motor's performance using appropriate tools and equipment

• Replace any worn out parts or components as
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Q1. What strategies can you use to succeed in an interview?
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To succeed in an interview, it is important to prepare thoroughly, practice common interview questions, research the company, dress professionally, and demonstrate enthusiasm and confidence.
• Thoroughly research the company and the position you are applying for

• Practice common interview questions and prepare examples of your skills and experiences

• Dress professionally and appropriately for the interview

• Demonstrate enthusia...read more
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Q2. What is the working principle of a star-delta starter?
Ans. 
A star-delta starter is used to reduce the starting current of a motor by initially connecting the motor windings in a star configuration and then switching to a delta configuration.
• The motor windings are initially connected in a star configuration during starting to reduce the starting current.

• After a certain period, the windings are switched to a delta configuration to achieve full speed and torque.

• This transition fr...read more
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Q1. What are undervoltage faults?
Ans. 
Undervoltage faults occur when the voltage in a system drops below the normal operating level, leading to potential equipment damage or malfunction.
• Undervoltage faults can be caused by issues such as power supply fluctuations, equipment failures, or overloaded circuits.

• These faults can lead to equipment damage, reduced efficiency, or complete shutdown of systems.

• Examples include a power surge causing a drop in voltage,...read more
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Q2. What are overvoltage faults?
Ans. 
Overvoltage faults are electrical faults that occur when the voltage in a circuit exceeds the normal operating range.
• Overvoltage faults can damage electrical components and equipment.

• They can be caused by lightning strikes, power surges, or faulty equipment.

• Protective devices like surge protectors and voltage regulators can help prevent overvoltage faults.

• Examples include a power surge from a lightning strike damaging ...read more
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Q1. What is the purpose of a thermal relay?
Ans. 
A thermal relay is used to protect electrical circuits from overloads by monitoring the temperature of the circuit and tripping when it exceeds a certain threshold.
• Monitors the temperature of the electrical circuit

• Trips and disconnects the circuit when temperature exceeds a set limit

• Protects against overloads and overheating

• Commonly used in motor protection applications
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Q2. What is an RDOL starter?
Ans. 
An RDOL starter is a type of reduced voltage starter used in electrical systems to reduce the starting current and torque of a motor.
• RDOL stands for Reduced Direct Online starter.

• It is used to start induction motors in a controlled manner.

• RDOL starters reduce the voltage supplied to the motor during starting to limit the inrush current.

• This helps in reducing mechanical stress on the motor and connected equipment.

• Common...read more
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Q1. Electrical motor pm
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Q2. Hi Mac tower lighting
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Q3. Panel maintenance
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Q4. Himansh tower lighting
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Q5. Motor pm registence value
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Q1. MELTING FURNACE
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Q2. MACHINE OPERATOR
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Q3. ABOUT SAFETY and precautions
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Q4. TOOLS and equipment
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About my working experience

Q1. Vernier scale reading?
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Q2. Micrometre reading?
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Q3. How I making alloy
Ans. 
Alloys are made by combining two or more metals to create a new material with improved properties.
• Select the metals to be combined based on desired properties

• Melt the metals together in a furnace

• Mix the molten metals thoroughly

• Cool and solidify the mixture to form the alloy
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Q1. File is made of
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Q2. Steel rule is a made of
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Q3. The point angle of scriber is
Ans. 
The point angle of scriber is the angle between the two cutting edges of the scriber.
• The point angle is typically between 30 and 60 degrees.

• It affects the sharpness and durability of the scriber.

• A larger point angle will result in a stronger but less sharp scriber.

• A smaller point angle will result in a sharper but less durable scriber.
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Q4. The point angle of centre punch
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The point angle of a centre punch is typically 90 degrees.
• The point angle is the angle between the two sides of the punch tip.

• A 90 degree point angle is the most common and versatile for general use.

• Different point angles can be used for specific applications, such as 60 degrees for softer materials.

• The point angle affects the size and shape of the indentation made by the punch.
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Q1. 1) tell me about your selfie
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I'm sorry, but I don't think I understand the question. Could you please clarify?
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Q2. 2) how to like this company
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Q3. Are you interested in this company
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Q4. Yes im interested i like this one company
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Q1. Bearing fittings Gearbox assembly
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Q2. Job requirment all equipment check
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Q3. So damage part ready prayority damage part change
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Q1. Whi is the butterfly valve service ❔
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Q2. What is the pressure cylinder
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