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Jacobs Engineering Group Interview Questions and Answers

Updated 5 Feb 2024

Q1. What is transformer ?

Ans.

A transformer is an electrical device that transfers electrical energy between two or more circuits through electromagnetic induction.

  • Consists of two or more coils of insulated wire wound around a core

  • Primary coil receives electrical energy and induces a magnetic field in the core

  • Secondary coil receives the magnetic field and converts it back to electrical energy

  • Used to step up or step down voltage levels in electrical systems

  • Examples include power distribution transformers a...read more

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Q2. What is lt and HT ?

Ans.

LT stands for Low Tension and HT stands for High Tension in the context of electrical systems.

  • LT refers to voltage levels below 1000V, while HT refers to voltage levels above 1000V.

  • LT is commonly used for household appliances and lighting, while HT is used for industrial equipment and power distribution.

  • LT systems are generally safer and easier to work with compared to HT systems.

  • Examples of LT equipment include ceiling fans, refrigerators, and light bulbs, while examples of ...read more

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Q3. What is Electrical Safety

Ans.

Electrical safety refers to practices and precautions taken to prevent electrical hazards and accidents.

  • Ensuring all electrical equipment is properly maintained and inspected regularly

  • Using appropriate personal protective equipment (PPE) when working with electricity

  • Following proper lockout/tagout procedures when working on electrical systems

  • Keeping work areas clean and free of clutter to prevent tripping hazards

  • Training employees on safe electrical practices and emergency pr...read more

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Q4. What is motor ?

Ans.

A motor is a device that converts electrical energy into mechanical energy to produce motion.

  • Motors can be found in various applications such as industrial machinery, household appliances, and vehicles.

  • There are different types of motors including AC motors, DC motors, and servo motors.

  • Motors consist of a rotor and a stator, with the rotor rotating within the stator to generate motion.

  • Common examples of motors include electric fans, washing machine motors, and car engines.

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Q5. What is vcb ?

Ans.

VCB stands for Vacuum Circuit Breaker, which is a type of circuit breaker that uses vacuum as the arc quenching medium.

  • VCB is used to interrupt the current flow in a circuit by creating a gap between contacts where the arc is extinguished in a vacuum.

  • It is commonly used in medium voltage applications for its high reliability and low maintenance requirements.

  • VCBs are preferred over other types of circuit breakers in situations where rapid interruption of high currents is requi...read more

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Q6. What is ACB ?

Ans.

ACB stands for Air Circuit Breaker, which is a type of circuit breaker that operates in the air to protect electrical circuits from overloads and short circuits.

  • ACB is commonly used in low voltage applications to protect electrical equipment.

  • It automatically cuts off the power supply when it detects an overload or short circuit.

  • ACBs are available in different sizes and ratings to suit various applications.

  • Examples of ACB manufacturers include Siemens, Schneider Electric, and ...read more

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