JCB Interview Questions, Process, and Tips

Q1. Machine testing operation related questions and previous experience related
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Q1. Work Done in previous Company
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Q1. Graduation year?
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Q1. Draw a hydraulic circuit
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A hydraulic circuit is a system that uses fluid to transmit power and control the movement of mechanical components.
• A hydraulic circuit typically consists of a power source, such as a hydraulic pump, which generates fluid flow and pressure.

• The fluid is then directed through various components, such as valves, cylinders, and motors, to perform specific tasks.

• Valves control the flow and direction of the fluid, allowing i...read more
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Q1. Why use in bukolze relay
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Bukolze relays are used in electrical engineering for their high reliability and ability to handle high voltage and current.
• Bukolze relays are known for their robustness and durability.

• They are commonly used in power distribution systems and industrial applications.

• These relays can handle high voltage and current levels, making them suitable for heavy-duty operations.

• They provide reliable switching and protection in el...read more
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Q2. Why use in star delta
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Star delta is used in electrical engineering to reduce starting current and protect motors.
• Star delta connection is used for induction motors.

• It reduces the starting current by a factor of √3.

• It helps in reducing voltage drop during motor starting.

• It protects the motor from excessive current and overheating.

• It is commonly used in applications where the motor needs to start with a low current.
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Q3. Why use in ten delta test in transformer ?
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Ten delta test is used to detect winding deformation and shorted turns in transformer.
• Detects winding deformation and shorted turns

• Helps in identifying internal faults

• Used for routine maintenance and troubleshooting
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Q4. Why use explolation went in tranformer ?
Ans. 
Explosion vent in transformer is used for safety purposes.
• It helps to release pressure build-up inside the transformer due to internal faults or external factors.

• It prevents the transformer from exploding and causing damage to the surrounding area.

• The vent is designed to open at a specific pressure level to ensure safe release of gases.

• It is a mandatory safety feature in transformers as per industry standards.

• Examples ...read more
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Math, English, Grammar

Q1. What is frequency
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Frequency is the number of occurrences of a repeating event per unit of time.
• Frequency is measured in Hertz (Hz).

• It is commonly used in electrical engineering to describe the rate at which alternating current changes direction.

• Higher frequency signals can carry more data but may have shorter range.

• Examples of frequency include 50 Hz for power supply in Europe and 60 Hz in the United States.
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Q2. What is difference between fuse and Mcb
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A fuse is a one-time use device that melts when there is an overload, while an MCB is a reusable device that trips when there is an overload.
• Fuse is a one-time use device, while MCB is reusable

• Fuse needs to be replaced after it melts, MCB can be reset

• Fuse operates on the principle of thermal or electrical melting, MCB operates on the principle of electromagnetism

• Fuse is slower in response time compared to MCB

• Examples:
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Q3. What is capacitor
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A capacitor is an electronic component that stores electrical energy in an electric field.
• Capacitors consist of two conductive plates separated by an insulating material called a dielectric.

• Capacitors are commonly used in electronic circuits to store and release electrical energy.

• They are used for filtering, smoothing, timing, tuning, and power factor correction in electrical systems.

• Examples of capacitors include cera...read more
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Q1. 1) Depend on department requirement.
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Q2. 2) Technical with commercial but more deep in welding.
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