Oswal Cables Private Limited Interview Questions and Answers

Q1. Furness related questions
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Q2. Work profile based questions
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Q1. Technical questions
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Q2. AC motor speed control method
Ans. 
AC motor speed can be controlled using methods like voltage control, frequency control, and pole changing.
• Voltage control: Adjusting the voltage supplied to the motor to change its speed.

• Frequency control: Changing the frequency of the AC power supplied to the motor to control its speed.

• Pole changing: Altering the number of poles in the motor to adjust its speed.

• Using variable frequency drives (VFDs) for precise speed
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Q3. Starter connections
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Q4. Circuit breaker
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Q5. Power plant and distribution
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Q1. What's percentage impedance and how is it related to performance of Distribution Transformer?
Ans. 
Percentage impedance is a measure of a transformer's ability to limit short-circuit currents and is related to its performance.
• Percentage impedance is the ratio of the transformer's impedance to its rated voltage.

• It is a measure of the transformer's ability to limit short-circuit currents and protect the system.

• A higher percentage impedance indicates a higher impedance and better protection against short-circuit curren...read more
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Q2. What's is Short Circuit how is the short circuit current calculated?
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Short circuit is an abnormal connection between two nodes of an electric circuit that results in excessive current flow.
• Short circuit occurs when a low-resistance path is created between two points in an electrical circuit.

• Short circuit current is calculated using Ohm's Law: I = V/R, where I is the current, V is the voltage, and R is the resistance.

• Short circuit current can also be calculated by dividing the voltage by...read more
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Q3. What are T&D and AT&C losses?
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T&D losses refer to Transmission and Distribution losses, while AT&C losses refer to Aggregate Technical and Commercial losses.
• T&D losses are the losses that occur when electricity is transmitted and distributed from power plants to consumers.

• AT&C losses include technical losses (due to inefficient equipment and infrastructure) and commercial losses (due to theft and billing inefficiencies).

• Reducing T&D and AT&C losses...read more
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Q4. What are Standard Performance indices?
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Standard Performance indices are metrics used to measure and evaluate the performance of an individual, team, or organization.
• Standard Performance indices are quantitative measures used to assess the efficiency, effectiveness, and quality of performance.

• They provide a benchmark for comparison and help in identifying areas for improvement.

• Examples include Key Performance Indicators (KPIs), Balanced Scorecard metrics, an...read more
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Q1. Induction motor
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Q1. What is the moter testing equipment name
Ans. 
Motor testing equipment is commonly known as a megohmmeter or insulation tester.
• Commonly known as a megohmmeter or insulation tester

• Used to measure the insulation resistance of motors

• Helps identify potential issues before they cause motor failure
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