Subject Part (Electrical/Electronics):
1. The ratio,
2.
3.
4.
5.
𝑚𝑎𝑥𝑖𝑚𝑢𝑚 𝑑𝑒𝑚𝑎𝑛𝑑 𝑜𝑓 𝑡ℎ𝑒 𝑖𝑛𝑠𝑡𝑎𝑙𝑙𝑎𝑡𝑖𝑜𝑛
𝑠𝑢𝑚 𝑜𝑓 𝑖𝑛𝑑𝑖𝑣𝑖𝑑𝑢𝑎𝑙 𝑚𝑎𝑥𝑖𝑚𝑢𝑚 𝑑𝑒𝑚𝑎𝑛𝑑𝑠
is known as
a. Demand factor
b. Plant use factor
c. Diversity factor
d. Plant capacity factor.
The breakdown voltage in gases depends on
a. distance between the electrodes
b. relative air density
c. humidity
d. all of the above
IGBT which combines the best parts of
a. BJT and JFET Transistors
b. Thyristors and Gates
c. MOSFET and SCR
d. BJT and MOSFET Transistors (ANS)
Which of the following plants is almost inevitably used as base load plant?
a. Gas turbine plant
b. Diesel engine plant
c. Pumped storage plant
d. Nuclear power plant.
Which of the following motors is non-self-starting?
a. Three phase induction motor
b. DC Shunt motor
c. DC series motor
d. Synchronous motor
6. Find inverse Laplace of
𝑠−7
.
𝑠2 −14𝑠+50
7. For a pure sinusoidal even functions the Fourier series has no
a. Sine Terms
b. Cosine Terms
c. Only Odd Sine Terms
d. DC constant
8. Fourier spectrums of the signals x[n] and x[n-1] have
a. different magnitude and same phase plot
b. different magnitude and different phase plot
c. same magnitude and different phase plot
d. Can't be predicted with given information.
9. What is hamming distance between two binary numbers: 011011 and 110001?
a. 3
b. 2
c. 1
d. 4
10. What is the minimum number of variable components needed to balance an AC bridge?
a. 1
b. 2
c. 3
d. 4
11. The Boolean function given by 𝐹 = Σ(1,3,4,5,6,7,11,14) can be implemented by which of the
following single multiplexer?
a. 4×1 Multiplexer
b. 8×1 Multiplexer
c. 12×1 Multiplexer
d. 16×1 Multiplexer
12.
𝜕2 𝑈
𝜕𝑥 2
𝜕2 𝑈
𝜕2 𝑈
+ 𝜕𝑦2 + 𝜕𝑧2 = 0 is called?
a. Laplace’s equation
b. Poisson’s equation
c. Bernoulli’s equation
d. Maxwell’s equation
13. A system has a single pole at origin, its impulse response will be:
a. Constant
b. Ramp
c. Decaying exponential
d. Oscillatory
14. Surge impedance of transmission line is given by
[In a transmission line having negligible resistance the surge impedance is]
𝟏
𝑳 𝟐
a.
(𝑪)
b.
( )
c.
(𝐶𝐿)2
1
𝐶 2
𝐿
1
d.
1
1
(𝐶𝐿)2
15. The low-frequency asymptote in the Bode Plot of type two system has a slope of
a. 0dB/decade
b. -20dB/decade
c. -40dB/decade
d. None of the above answers
16. Each transistor in the Darlington pair has hfe =100. The overall hFE of the composite transistor
neglecting the leakage currents is
a. 10000
b. 10100 (ANS) hfe(hfe+1) when considering leakage!
c.
d.
10001
10200
3𝜋𝑛
) is
7
17. The time period of the signal 𝑦[𝑛] = cos (
a. 14/3
b. 21
c. 14
d. 7
18. For low head and high discharge, the hydraulic turbine used is
a. Kaplan turbine
b. Francis turbine
c. Pelton wheel
d. Jonual turbine.
19. The system given by 𝑦(𝑡) = 2𝑥(𝑡) + 3 is
a. Linear and LTI
b. Non-Linear and Non-LTI
c. Non-Linear and LTI
d. Linear and Non-LTI
20. Find the conditions for the system to be stable?
a. Gain margin and phase margins are positive
b. Gain margin and phase margins are negative
c. Gain margin is positive but phase margin is negative
d. Gain margin is negative but phase margin is positive