Home Subjects Electrical Engg (EEE)

Electrical Engg (EEE)

Electrical machines, power systems, circuits

196 Q 7 Topics Take Mock Test
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Difficulty: All Easy Medium Hard 101–110 of 196
Topics in Electrical Engg (EEE)
Q.101 Easy Control Systems
Which of the following represents a first-order system?
A G(s) = K/(s² + 2s + 5)
B G(s) = K/(τs + 1)
C G(s) = K(s + 1)/(s² + s + 1)
D G(s) = Ks/(s³ + 2s² + 3s + 1)
Correct Answer:  B. G(s) = K/(τs + 1)
EXPLANATION

A first-order system has only s¹ as the highest power in the denominator. G(s) = K/(τs + 1) is the standard first-order form.

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Q.102 Easy Control Systems
The transfer function of a system is defined as the ratio of:
A Output to input in time domain
B Laplace transform of output to Laplace transform of input with zero initial conditions
C Input to output in frequency domain
D System gain to bandwidth
Correct Answer:  B. Laplace transform of output to Laplace transform of input with zero initial conditions
EXPLANATION

Transfer function G(s) = Y(s)/U(s) is the ratio of Laplace transforms of output to input assuming zero initial conditions.

Test
Q.103 Easy Control Systems
What is the primary function of a feedback control system?
A To reduce the error between desired and actual output
B To increase the system gain
C To eliminate all disturbances
D To increase the bandwidth of the system
Correct Answer:  A. To reduce the error between desired and actual output
EXPLANATION

Feedback control systems work by comparing the desired output with actual output and reducing the error between them through corrective action.

Test
Q.104 Easy Power Systems
In a 400 kV transmission line in India's western grid, if the series reactance is 0.35 Ω/km and the line length is 250 km, what is the total series reactance of the transmission line?
A 87.5 Ω
B 105 Ω
C 140 Ω
D 175 Ω
Correct Answer:  A. 87.5 Ω
EXPLANATION

Total series reactance = 0.35 Ω/km × 250 km = 87.5 Ω. This is a fundamental calculation for transmission line parameters commonly tested in GATE and ESE.

Test
Q.105 Easy Power Systems
In India's 2024-25 grid, which state has the highest installed renewable energy capacity?
A Gujarat
B Rajasthan
C Karnataka
D Andhra Pradesh
Correct Answer:  A. Gujarat
EXPLANATION

Gujarat leads in combined renewable capacity including solar parks and wind farms as per latest 2024-25 CEA reports.

Test
Q.106 Easy Power Systems
In a power system, the angle between voltage and current phasors is known as:
A Power angle
B Phase angle
C Rotor angle
D Impedance angle
Correct Answer:  B. Phase angle
EXPLANATION

The phase angle (φ) between voltage and current phasors determines the power factor of the system.

Test
Q.107 Easy Power Systems
What is the standard frequency of the Indian power grid?
A 50 Hz
B 60 Hz
C 25 Hz
D 100 Hz
Correct Answer:  A. 50 Hz
EXPLANATION

India follows the 50 Hz standard frequency for AC power systems, as per IEC standards.

Test
Q.108 Easy Power Systems
Which of the following is NOT a renewable energy source integrated into the Indian grid?
A Solar power
B Wind power
C Tidal power
D Biomass
Correct Answer:  C. Tidal power
EXPLANATION

As of 2024-25, tidal energy has not been commercially integrated into the Indian grid on a significant scale, unlike solar, wind, and biomass.

Test
Q.109 Easy Power Systems
What is the primary function of a circuit breaker in a power system?
A To automatically interrupt fault currents and protect the system
B To regulate voltage in transmission lines
C To increase power factor
D To measure active power consumption
Correct Answer:  A. To automatically interrupt fault currents and protect the system
EXPLANATION

Circuit breakers detect abnormal currents and automatically disconnect faulty sections to prevent equipment damage and cascading failures.

Test
A shaded pole induction motor uses ________ for starting torque generation.
A Capacitor
B Shaded pole or copper ring
C External resistance
D Mechanical switch
Correct Answer:  B. Shaded pole or copper ring
EXPLANATION

Shaded pole motors use a copper ring or shaded pole around part of the pole face to create a phase shift in the magnetic field, producing starting torque without additional components.

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