Ques 1Analog Electronics

A common-source amplifier with a drain resistance, RD = 4.7 kΩ, is powered using a 10 V power supply. Assuming that the transconductance, gm, is 520 µA/V, the voltage gain of the amplifier is closest to:

a. 1.22
b. –1.22
c. 2.44
d. –2.44

Ques 2Aptitude

Select the next element of the series:
Z, WV, RQP, _______

a. JIHG
b. KJIH
c. NMLK
d. LKJI

Ques 3Aptitude

Stock markets _________ at the news of the coup.

a. plunged
b. plugged
c. poised
d. probed

Ques 4Aptitude

People were prohibited ________ their vehicles near the entrance of the main administrative building.

a. to park
b. to have parked
c. from parking
d. parking

Ques 5Aptitude

If P, Q, R, S are four individuals. How many teams of size exceeding one can be formed, with Q as a member?

a. 8
b. 6
c. 5
d. 7

Ques 6Aptitude

In four-digit integer numbers from 1001 to 9999, the digit group “37” (in the same Q.3 sequence) appears ______ times.

a. 299
b. 270
c. 280
d. 279

Ques 7Aptitude

Non-performing Assets (MPAs) of a bank in India is defined as an asset, which remains unpaid by a borrower for a certain period of time in terms of interest, principal, or both. Reserve Bank of India (RBI) has changed the definition of NPA thrice during 1993-2004. in terms of the holding period of loans. The holding period was reduced by one quarter each time. In 1993, the holding period was four quarters (360 days). Based on the above paragraph, the holding period of loans in 2004 after the third revision was ______ days.

a. 45
b. 135
c. 90
d. 180

Ques 8Aptitude

Select the word that fits the analogy:
Do : Undo : Trust : ______

a. Untrust
b. Intrust
c. Distrust
d. Entrust

Ques 9Aptitude

This book, including all its chapters _______ interesting. The students as well as the instructor _______ in agreement about it.

a. are, are
b. is, was
c. is, are
d. were, was

Ques 10Digital Electronics

A sequence detector is designed to detect precisely 3 digital inputs, with overlapping sequences detectable. For the sequence (1, 0, 1) and input data (1,1, 0,1,0,0,1,1,0,1,0,1,1,0):
what is the output of this detector?

a. 0,1,0,0,0,0,0,1,0,1,0,0
b. 0,1,0,0,0,0,0,0,1,0,0,0
c. 1,1,0,0,0,0,1,1,0,1,0,0
d. 0,1,0,0,0,0,0,1,0,1,1,0

Ques 11Electrical Machine

A single-phase, 4 kVA, 200 V/100 V, 50 Hz transformer with laminated CRGO steel core has rated no-load loss of 450 W. When the high-voltage winding is excited with 160 V, 40 Hz sinusoidal ac supply, the no-load losses are found to be 320 W. When the highvoltage winding of the same transformer is supplied from a 100 V, 25 Hz sinusoidal ac source, the no-load losses will be _________W (rounded off to 2 decimal places).

Ques 12Electrical Machine

A three-phase. 50 Hz. 4-pole induction motor runs at no-load with a slip of 1%. With full load, the slip increases to 5 %. The % speed regulation of the motor (rounded off to 2 decimal places) is _________ .

Ques 13Electrical Machine

A three-phase cylindrical rotor synchronous generator has a synchronous reactance X_s and a negligible armature resistance. The magnitude of per-phase terminal voltage is V_A and the magnitude of per phase induced emf is E_A. Considering the following two statements, P and Q.
P : For any three-phase balanced leading load connected across the terminals of this synchronous generator, V_A is always more than E_A.
Q : For any three-phase balanced lagging load connected across the terminals of this synchronous generator, V_A is always less than E_A.
Which of the following options is correct?

a. P is true and Q is true.
b. P is true and Q is false.
c. P is false and Q is false.
d. P is false and Q is true.

Ques 14Electrical Machine

A single 50 Hz synchronous generator on droop control was delivering 100 MW power to a system. Due to increase in load, generator power had to be increased by 10 MW. as a result of which, system frequency dropped to 49.75 Hz. Further increase in load in the system resulted in a frequency of 49.25 Hz. At this condition, the power in MW supplied by the generator is ________ (rounded off to 2 decimal places)

Ques 15Mathematics

ax³ + bx² + cx + d is a polynomial on real x over real coefficients a, b, c, d wherein a ≠ 0. Which of the following statements is true?

a. No choice of coefficients can make all roots identical.
b. a, b, c, d can be chosen to ensure that all roots are complex.
c. d can be chosen to ensure that x = 0 is a root for any given set a, b, c.
d. c alone cannot ensure that all roots are real.

Ques 16Mathematics

Which of the following statements is true about the two sided Laplace transform?

a. It has no poles for any bounded signal that is non-zero only inside a finite time interval.
b. If a signal can be expressed as a weighted sum of shifted one sided exponentials, then its Laplace Transform will have no poles
c. It exists for every signal that may or may not have a Fourier transform.
d. The number of finite poles and finite zeroes must be equal.

Ques 17Network Theory

x_R and x_A are, respectively, the rms and average values of x(t) = x(t – T), and similarly, y_R and y_A are, respectively, the rms and average values of y(t) = kx(t) ⋅ k, T are independent of t. Which of the following is true?

a. y_A = kx_A ; y_R = kx_R
b. y_A = kx_A; y_R ≠ kx_R
c. y_A ≠ kx_A ; y_R ≠ kx_R
d. y_A ≠ kx_A ; y_R = kx_R

Ques 18Power Electronics

A single-phase, full-bridge diode rectifier fed from a 230 V, 50 Hz sinusoidal source Q.8 supplies a series combination of finite resistance. R, and a very large inductance, L, The two most dominant frequency components in the source current are

a. 150 Hz, 250 Hz
b. 50 Hz, 150 Hz
c. 50 Hz, 100 Hz
d. 50 Hz, 0 Hz

Ques 19Power System

A lossless transmission line with 0.2 pu reactance per phase uniformly distributed along Q.16 the length of the line, connecting a generator bus to a load bus, is protected up to 80% of its length by a distance relay placed at the generator bus. The generator terminal voltage is 1 pu. There is no generation at the load bus. The threshold pu current for operation of the distance relay for a solid three phase-to-ground fault on the transmission line is closest to:

a. 1.00
b. 2.00
c. 5.56
d. 6.25