Explain the working principle of transformer dimmers with the help of a neat sketch.

State the necessity of synchroscope and with neat sketch explain its working.
Answer : ### Necessity of a Synchroscope A **synchroscope** is an important device used to measure and indicate the **synchronization** of the speed, frequency, and phase of an incoming alternator (generator) ... generator is in sync with the grid, and the circuit breaker can be closed to connect them....

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With the neat sketch explain working of Dynamometer type wattmeter.

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With neat sketch of PMMC instrument explain its working briefly.

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With neat sketch, explain working of directional overcurrent relay.

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Explain working of vertical break isolator with neat sketch.

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Explain the principle of operation of Doppler type ultrasonic flow meter with a neat labeled sketch.

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Describe with neat sketch the construction and working principle of MOSFET.

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With neat sketch state the working principle of Star-Delta starter.

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Draw a neat sketch of Rotameter and explain its working principle.

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Explain with the help of a neat diagram the following methods of speed control for a DC series motor: (i) Field diverter method. (ii) Tapped field method.

Explain with the help of a neat diagram the following methods of speed control for a DC series motor: (i) Field diverter method. (ii) Tapped field method.
Answer : ### Speed Control of DC Series Motor DC series motors are commonly used in applications where the motor needs to run at varying speeds, such as in cranes, electric trains, and ... given armature current, but they come with different complexities and impacts on the overall motor performance....

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Describe the working of synchronous reluctance motor with the help of neat diagram.

Describe the working of synchronous reluctance motor with the help of neat diagram.
Answer : ### Working of Synchronous Reluctance Motor (SynRM) A **Synchronous Reluctance Motor (SynRM)** is a type of electric motor that operates on the principle of reluctance, similar to a ... certain applications, though it does have some limitations in terms of starting torque and power density....

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Explain the function of different parts of a typical nuclear power plant with a neat sketch.

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With neat sketch explain four modes of operation of a TRIAC.

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Explain the different types of DC motors with a neat sketch.

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Explain with a neat sketch the Pilot wire protection scheme applied to transmission line.

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Explain the differential protection scheme for busbars with a neat sketch.

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Explain with a neat sketch fault bus protection scheme.

Explain with a neat sketch fault bus protection scheme.
Answer : **Fault Bus Protection Scheme** A fault bus protection scheme is used to detect and isolate faults occurring on a busbar in electrical power systems. A busbar is a central connection ... widespread system disturbances and ensures continuity in the operation of other parts of the electrical network....

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Explain electric arc welding with a neat sketch.

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Draw the constructional diagram of LVDT. State its working principle. What is residual voltage? Explain with a neat diagram.

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Explain the working principle of various types of single-phase induction motors with a neat circuit diagram.

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Illustrate with neat sketch the working of automatic power factor corrector as an energy conservation device.

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Describe with neat sketch working of hysteresis motor.

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Describe with neat sketch the working of shaded pole induction motor.

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Explain with neat sketch basic trip circuit of protection relaying.

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Explain with neat sketch: (i) Earth resistance measurement using earth tester (ii) High resistance measurement using megger.

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Explain the shackle type insulator with neat sketch.

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Explain the working principle of SMPS with neat diagram.

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Describe the working principle of a thyristor-operated dimmer with the help of a circuit diagram.

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State and explain working of phase sequence indicator with suitable sketch.

State and explain working of phase sequence indicator with suitable sketch.
Answer : A **Phase Sequence Indicator (PSI)** is a device used to determine the sequence of phases in a three-phase electrical system. The phase sequence indicates the order in which the three-phase supply ... system operation. Would you like a diagram or further details on any part of the explanation?...

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Explain the working of single phase electronic energy meter with sketch.

Explain the working of single phase electronic energy meter with sketch.
Answer : A **single-phase electronic energy meter** is used to measure the energy consumption in a single-phase electrical system. These meters are more accurate and reliable compared to the older ... mechanical ones. They provide real-time energy consumption data and are essential for accurate billing....

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What is pyrometry? Explain the working of optical pyrometer with a neat diagram. State its one application.

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Why is Rotameter called a variable area flowmeter? Explain the working of Rotameter with a neat diagram. State one advantage and one disadvantage.

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Explain the working of a single phasing preventer with a neat diagram.

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Explain working of autotransformer starter for a 3 phase induction motor with neat diagram.

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State the purpose of lighting control. List different types of dimmers. Explain any two dimmers with suitable diagrams.

State the purpose of lighting control. List different types of dimmers. Explain any two dimmers with suitable diagrams.
Answer : ### Purpose of Lighting Control The primary purpose of lighting control is to manage and optimize the lighting in a space for various needs. This involves adjusting the brightness, color, and ... and cheaper, Triac-based dimmers offer better energy efficiency and a broader range of applications....

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