Statements: I: In direct resistance heating, current flows through external heating elements only. II: The charge is not a part of the electric circuit. — Electrical Engineering MCQ

C. Statement I is false, statement II is true

D. Statement I is true, statement II is false

Which of the following is a major advantage of PMMC instruments? — Electrical Engineering MCQ

D. Uniform scale and high accuracy

A. No controlling torque required

C. Suitable for very high voltages

Statement I: Admittance method is more efficient for complex parallel AC circuits. Statement II: Admittances in parallel add algebraically like resistors in parallel. — Electrical Engineering MCQ

B. Both statements are true, and Statement II is the correct explanation of Statement I.

A. Statement I is true, and Statement II is false.

C. Both statements are true, but Statement II is not the correct explanation.

D. Both statements I and II are false.

What is the main effect of field failure in an alternator? — Electrical Engineering MCQ

B. It causes the alternator to operate as an induction generator.

A. It leads to reverse power flow.

C. It increases terminal voltage.

At which point on the V-Curve does the synchronous motor operate at unity power factor? — Electrical Engineering MCQ

D. At the minimum armature current

A. At the maximum armature current

If the value of the Reynolds number is less than 1900, then: — Electrical Engineering MCQ

C. the liquid follows laminar flow

A. the liquid follows neither turbulent flow nor laminar flow

B. the liquid is converting from laminar flow to turbulent flow

D. the liquid follows turbulent flow

Why is the starting torque of a squirrel-cage induction motor generally low? — Electrical Engineering MCQ

C. Because rotor current lags the rotor EMF significantly

A. Because of high power factor at start

B. Because starting current is low

D. Due to high rotor resistance

In a tuned series RLC circuit, what happens at the resonant frequency? — Electrical Engineering MCQ

C. The inductive and capacitive reactances are equal in magnitude but opposite in phase.

A. The capacitive reactance becomes maximum.

B. The total impedance is purely inductive.

D. The inductive reactance becomes zero.

Statement I: A reduction in air gap of a magnetic circuit will increase the lifting power. Statement II: The lifting power is directly proportional to the reluctance of the magnetic circuit. — Electrical Engineering MCQ

B. Statement I is true, Statement II is false.

A. Both Statement I and Statement II are true.

C. Both Statement I and Statement II are false.

D. Statement I is false, Statement II is true.

What is the main purpose of resistance switching in circuit breakers? — Electrical Engineering MCQ

C. To reduce arcing energy and aid arc extinction

A. To maintain constant voltage

B. To increase current flow during switching

D. To improve insulation strength

In filament lamps, why should the oxidising temperature of a filament be higher than its operating temperature? — Electrical Engineering MCQ

C. To prevent the oxidised layers from flaking off, thereby increasing filament life

A. To ensure the filament operates at a lower voltage

B. To increase the filament's resistance for better performance

D. To reduce the power consumption of the filament

एक समतलीय परिपथ (planar circuit) को हल करने के लिए आवश्यक जाल समीकरणों की संख्या ________ के बराबर होती है। — Electrical Engineering MCQ

D. स्वतंत्र जालों की संख्या

A. लूपों की संख्या

B. नोडों की संख्या

C. शाखाओं की संख्या

I: In the first angle projection, the object is between the observer and plane. II: In the third angle projection, the plane is between the observer and object. — Electrical Engineering MCQ

C. Both statement I and statement II are correct.

A. Only statement II is correct.

B. Both statement I and statement II are wrong.

D. Only statement I is correct.

Which of the following is NOT a consequence of neutral shift in an unbalanced load system? — Electrical Engineering MCQ

A. Overheating of neutral conductor

C. Voltage imbalance across the phases

D. Deformation of the load voltage

जब एक तुल्यकालिक मोटर का रोटर तुल्यकालिक चाल के निकट पहुँचने के बाद उत्तेजित होता है, तो क्या होता है? — Electrical Engineering MCQ

B. रोटर चुंबकीय रूप से स्टेटर से जुड़ जाता है

A. रोटर कभी भी अतुल्यकालिक चाल प्राप्त नहीं कर पाता है

C. रोटर की चाल और बढ़ जाती है

D. मोटर रुक जाती है

When a conductor moves through a magnetic field at angle θ, e = Blv sinθ. Which correctly explains the variables? — Electrical Engineering MCQ

D. B is magnetic flux density, l is length of conductor, v is speed, θ is angle between velocity and field

A. B is angle, l is velocity, v is flux density, θ is length

B. B is field strength, l is speed, v is distance, θ is angle

C. B is velocity, l is flux, v is flux density, θ is angle

The use of a split-ring commutator in a DC generator results in: — Electrical Engineering MCQ

C. continuous alternating output

Statement I: In a series R-L circuit, current always lags behind voltage. Statement II: The phase angle depends on the ratio of inductive reactance to resistance. — Electrical Engineering MCQ

B. Both Statements true, and II is the correct explanation of I.

A. Both Statements true, but II is not the correct explanation of I.

C. Statement I is true and Statement II is false.

D. Both statements I and II are false.

Which of the following describes the principle of operation of electrostatic instruments? — Electrical Engineering MCQ

A. Electrostatic attraction or repulsion

Which of the following best explains the advantage of using Owen's Bridge circuit for inductance measurement? — Electrical Engineering MCQ

B. It enables accurate inductance measurement using non-inductive components.

A. It requires an additional standard inductor for measurement.

C. It allows simultaneous measurement of resistance and capacitance.

D. It directly provides quality factor (Q) of the inductor.

Which of the following will increase the inductance of a coil? — Electrical Engineering MCQ

A. Increasing the coil's radius

B. Using a core with low permeability

C. Increasing the coil's length

D. Decreasing the number of turns

Which of the following is a reason for preferring double-layer windings over single-layer windings in AC machines? — Electrical Engineering MCQ

D. They offer lower leakage reactance.

A. They require non-identical coils.

What is the basic principle of distance protection in transmission lines? — Electrical Engineering MCQ

B. It calculates the impedance between the relay location and the fault point.

A. It monitors current flow only.

C. It measures the time taken by a fault wave to reach the relay.

D. It measures the temperature of the conductor.

What happens to the viscosity of a liquid if its temperature rises? — Electrical Engineering MCQ

B. It does not depend on the temperature.

NHPC JE 2025 QUESTION - NHPC JE Electrical Engg. PYQ

NHPC JE Electrical Engg. 2025 QUESTION - NHPC JE Electrical Engg. PYQ

131

Statement: Inductors oppose sudden changes in current in a circuit.

NHPC JE 2025

132

The efficiency of power transfer under maximum power transfer conditions is:

NHPC JE 2025

133

What is the primary purpose of protective relays in a power grid?

NHPC JE 2025

134

In a magnetic circuit, the energy supplied is spent in two ways. Which is true about the energy stored in the magnetic field?

NHPC JE 2025

135

Which is the most common type of fault in overhead transmission lines?

NHPC JE 2025

136

In a parallel R-C circuit, the current through the resistor ____________.

NHPC JE 2025

137

The range of electrostatic voltmeters can be extended by:

NHPC JE 2025

138

What is the usual coverage of Zone-1 in a distance protection relay?

NHPC JE 2025

139

Which of the following accurately represents the standard output voltage levels delivered by secondary distribution substations in most urban residential areas in India?

NHPC JE 2025

140

What remains constant when measuring voltage regulation of an alternator?

NHPC JE 2025

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