Bharat Petroleum Apprentice Interview Questions and Answers

Q1. What is required for parallel operation of two transformer
Ans. 
Synchronization, similar voltage ratios, and proper phase sequence are required for parallel operation of two transformers.
• Synchronization of the two transformers is crucial to ensure they operate together smoothly.

• The transformers should have similar voltage ratios to prevent imbalance in the system.

• Proper phase sequence must be maintained to avoid damaging the transformers or causing power quality issues.
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Q2. Why induction motor is self starting.
Ans. 
Induction motors are self-starting due to the rotating magnetic field produced by the stator windings.
• Induction motors have a unique design where the stator windings create a rotating magnetic field.

• This rotating magnetic field induces currents in the rotor windings, causing it to rotate and start the motor.

• No external starting mechanism is required for induction motors to begin operating.

• The principle of induction all...read more
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Quantitative, Reasonning, English Grammer

Q1. Basic HR quesion
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Q2. HR Discussion regarding soft skills.
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Q1. What is torque?
Ans. 
Torque is a measure of the rotational force applied to an object.
• Torque is calculated by multiplying the force applied by the distance from the pivot point.

• It is measured in units such as Newton-meters (Nm) or foot-pounds (ft-lb).

• Torque is essential in understanding the effectiveness of engines and machinery.

• For example, a wrench applying force to loosen a bolt is exerting torque.
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Q2. Explain power factor.
Ans. 
Power factor is a measure of how effectively electrical power is being used in a circuit.
• Power factor is the ratio of real power (in watts) to apparent power (in volt-amperes) in a circuit.

• It is a number between 0 and 1, with 1 indicating perfect efficiency.

• Low power factor can result in increased energy costs and inefficient use of electrical power.

• Power factor correction can be implemented to improve power factor and...read more
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Just some random maths and iq test questions

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Q1. Tell me about yourself
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Q2. How all incoming voltage are multiple of 11kv
Ans. 
Incoming voltage is multiple of 11kv due to the design of the power grid.
• The power grid is designed to operate at a specific voltage level

• The voltage level is determined by the transformers used in the grid

• Transformers are designed to step up or step down voltage levels

• In the case of 11kv, it is a common voltage level used in power transmission and distribution
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Q3. Because of 1.11 power factor
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Q4. Did AC current has Polarity how you define it
Ans. 
Yes, AC current has polarity.
• AC current periodically changes direction, so it has polarity.

• The polarity of AC current is determined by the direction of current flow at any given moment.

• The polarity of AC current is usually represented using positive and negative signs or symbols.

• Polarity reversal occurs in AC current at regular intervals, typically 50 or 60 times per second.

• The concept of polarity is important in AC ci...read more
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