Give the specification of a three-phase transformer as per IS 1180 (Part 1) 1989 (any four).

State any four advantages of having stationary armature in case of three phase alternator.
Answer : In a three-phase alternator, having a stationary armature (i.e., the armature is fixed and the rotor rotates) provides several advantages: 1. **Simplified Design**: A stationary ... seen in machines with rotating armatures. This leads to lower maintenance requirements and longer operational life....

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Describe the method of converting a three-phase to a two-phase transformer by neat diagram. State any two applications.

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Three phase induction motor is known as generalized transformer. Justify.

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Give a comparison between LED and CFL lamps (Any four points).

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Compare HRC fuse and Circuit breakers as interrupting devices on any four points.

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Give some methods available for measuring three-phase power.

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Explain the use of the following components in electrical wiring system and give specification of each: (i) MCB (ii) ELCB.

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Compare core type and shell type transformer on any four parameters.

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A plant consists of two 10 MVA generators of reactance 18% each and two 5 MVA generators of 12% each. All are connected to bus bar to supply a load through three step up transformers of 8 MVA each having reactance of 8%. Determine fault MVA on HV side of any one transformer.

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List different starting methods of three phase synchronous motor. Explain any one of them.

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List the speed control methods of three phase induction motor and explain any one method.

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Write any two differences between single-phase and three-phase transformers.

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A three-phase transformer having a line voltage ratio of 0.4 kV/11kV is connected Star/Delta and protective transformers on the 0.4 kV side have a current ratio of 500/5. Calculate the ratio of the protective transformers on the 11 kV side. Draw a neat circuit diagram and indicate the given values at appropriate places.

A three-phase transformer having a line voltage ratio of 0.4 kV/11kV is connected Star/Delta and protective transformers on the 0.4 kV side have a current ratio of 500/5. Calculate the ratio of ... on the 11 kV side. Draw a neat circuit diagram and indicate the given values at appropriate places.

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A 220V/22kV three-phase transformer is connected in star/delta. The protective transformers on the 220V side have a current ratio of 400/5. Calculate the CT ratio on the 22kV side.

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How does a three-phase transformer work?

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State the definition of energy audit as per energy conservation act.

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Select the illumination level required as per ISI for the following working planes in residential buildings (i) Kitchen sink (ii) Staircase (iii) Dining room (iv) Study room.

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Select illumination level required as per ISI for the following working planes in residential building (i) kitchen (ii) living room (iii) dining room (iv) study room.

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A 3 phase line of 4 km length delivers 4000 kW at a p.f of 0.8 lagging to a load the resistance and reactance per km of each conductor are 0.2 Ω and 0.5 Ω respectively if the voltage at the supply end is maintained at 11 kV. Calculate the received end voltage and efficiency of line.

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Give the four advantages of vertical axis windmills.

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List any two direct methods of level measurement. Explain Hydrostatic method of level measurement. Give one advantage and one disadvantage of it.

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State the function of strain gauge. Give its types and explain the working of any one type of it.

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Give the classification of the transducer on any two factors.

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Give any two advantages of slipring rotor over squirrel cage rotor.

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Give any two applications for i) Universal motor and ii) Hysteresis motor.

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Which job pays 1 crore per month?

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Which job has 1 lakh salary per month in India?

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State any four salient features of a microprocessor-based protection relay. Draw a block diagram of a microprocessor-based overcurrent relay.

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State any four design considerations for the illumination scheme of a commercial complex.

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List different types of faults occured on a power system. Draw necessary sketches (any four)

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List any four commercial losses and suggest a remedy to overcome it.

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Write any four safety measures and precautions to be followed for a special purpose lamp.

Write any four safety measures and precautions to be followed for a special purpose lamp.
Answer : Here are four safety measures and precautions to follow when using a special-purpose lamp: 1. **Proper Ventilation**: Ensure the lamp is used in a well-ventilated area, especially if it's a ... the specifications for the lamp. Using incorrect power can lead to lamp failure or cause a safety hazard....

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