1) The Q - meter works on the principle of
A) mutual inductance
B)
self inductance
C) series resonance
D) parallel resonance
Answer :
(C)
2)A 800 kV transmission line is having per phase line
inductance of 1.1 mH/km and per phase line capacitance of 11.68 nF/km. Ignoring
the length of the line, its ideal power transfer capability in MW is
A)
1204 MW
B) 1504 MW
C) 2085 MW
D) 2606 MW
Answer :
(C)
3) In a PCM system, if the code word length is increased from
6 to 8 bits, the signal to quantization noise ratio improves by the factor
A) 8/6
B) 12
C) 16
D) 8
Answer : (C)
4) At
an industrial sub-station with a 4 MW load, a capacitor of 2 MVAR is installed
to maintain the load power factor at 0.97 lagging. If the capacitor goes out of
serivce, the load power factor becomes
A) 0.85
B) 1.00
C) 0.80
lag
D) 0.90 lag
Answer : (C)
5) The conduction loss
versus device current characteristic of a power MOSFET is best approximated by
A) a parabola
B) a straight line
C) a rectangular hyperbola
D)
an exponentially decaying function
Answer : (A)
6) High
Voltage DC (HVDC) transmission is mainly used for
A) bulk power
transmission over very long distances
B) inter-connecting two systems with
the same nominal frequency
C) eliminating reactive power requirement in the
operation
D) minimizing harmonics at the converter stations
Answer :
(A)
7) For the equation,
s3 - 4s2+ s + 6 = 0
the number of
roots in the left half of s-plane will be
A) 0
B) 1
C) 2
D)
3
Answer : (C)
8) For the function f(x) = x2 e-x, the
maximum occurs when x is equal to
A) 2
B) 1
C) 0
D)
-1
Answer : (B)
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