No. 
Question 
1 
A 50 kW dc shunt motor is loaded to draw rated
armature current at any given speed. When driven
(i) at half the rated speed by armature voltage control and
(ii) at 1.5 times the rated speed by field control, the respective
output powers delivered by the motor are approximately. 
Options 
A) 25kW in (i) and 75kW in (ii) 
B) 25kW in (i) and 50kW in (ii)

C) 50kW in (i) and 75kW in (ii) 
D) 50kW in (i) and 50kW in (ii) 

Correct Answer 
B 

2 
A fair coin is tossed three times in succession.
If the first toss poduces a head, then the probability of getting
exactly two heads in three tosses is 
Options 

Correct Answer 
D 

3 
In the matrix equation Px = q, which of the
following is a necessary condition for the existence of at least one
solution for the unknown vector x:

Options 
A) Augmented matrix [Pq] must have the same rank as
matrix P

B) Vector q must have only nonzero elements

C) Matrix P must be singular

D) Matrix P must be square 

Correct Answer 
A 

4 
At an industrial substation 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 
Options 
A) 0.85 
B) 1.00

C) 0.80 lag 
D) 0.90 lag 

Correct Answer 
C 

5 
In the GH(s) plane, the Nyquist plot of the
loop transfer function
G(s)H(s) =
asses through the negative real axis at the point

Options 
A) (0.25, j0) 
B) (0.5, j0)

C) (l, j0) 
D) (2, j0) 

Correct Answer 
B 

6 
If S =
ò 
¥ 

x^{3} dx, then S has the value 
1 


Options 

Correct Answer 
C 

7 
The following motor definitely has a permanent
magnet rotor 
Options 
A) DC commutator motor 
B) Brushless dc motor

C) Stepper motor 
D) Reluctance motor 

Correct Answer 
C 

8 
The conduction loss versus device current
characteristic of a power MOSFET is best approximated by 
Options 
A) a parabola

B) a straight line

C) a rectangular hyperbola

D) an exponentially decaying function 

Correct Answer 
A 

9 
A digitaltoanalog converter with a fullscale
output voltage of 3.5 V has a resolution close to 14m V. Its bit size is 
Options 

Correct Answer 
B 

10 
A 50 Hz, bar primary CT has a secondary with 500
turns. The secondary supplies 5 A current into a purely resistive burden
of l W. The magnetizing ampereturns is 200. The phase angle between the
primary and secondary current is 
Options 
A) 4.6°

B) 85.4° 
C) 94.6°

D) 175.4° 

Correct Answer 
A 

11 
The armature resistance of a permanent magnet dc
motor is 0.8 W. At no load, the motor draws 1.5 A from a supply voltage
of 25 V and runs at 1500 rpm. The efficiency of the motor while it is
operating on load at 1500 rpm drawing a current of 3.5 A from the same
source will be 
Options 
A) 48.0% 
B) 57.1%

C) 59.2% 
D) 88.8% 

Correct Answer 
A 

12 
A bipolar junction transistor (BJT) is used as a
power control switch by biasing it in the cutoff region (OFF state) or
in the saturation region (ON state). In the ON state, for the BJT 
Options 
A) both the baseemitter and basecollector junctions
are reverse biased 
B) the baseemitter junction is reverse biased, and
the basecollector junction is forward biased 
C)
the baseemitter junction is forward biased, and the
basecollector junction is reverse biased 
D) both the baseemitter and basecollector junctions
are forward biased 

Correct Answer 
D 

13 
For the equation,
s^{3 } 4s^{2}+ s + 6 = 0
the number of roots in the left half of splane will be 
Options 
A) zero 
B) one

C) two 
D) three


Correct Answer 
C 

14 
The Q  meter works on the principle of 
Options 
A) mutual inductance 
B) self inductance

C) series resonance 
D) parallel resonance 

Correct Answer 
C 

15 
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 
Options 
A) 1204 MW 
B) 1504 MW 
C) 2085 MW 
D) 2606 MW 

Correct Answer 
C 

16 
The insulation strength of an EHV transmission
line is mainly governed by 
Options 
A) load power factor 
B) switching overvoltages

C) harmonics 
D) corona 

Correct Answer 
B 

17 
If the following program is executed in a
icroprocessor, the number of instruction cycles it will take from START
to HALT is
START MVI A, 14H ; Move 14H to register A
SHIFT RLC ; Rotate left without carry
JNZ SHIFT ; Jump on nonzero to SHIFT
HALT 

Options 

Correct Answer 
C 

18 
A moving iron ammeter produces a full scale
torque of 240 mNm with a deflection of 120°
at a current of 10 A. The rate of change of self inductance (mH/radian)
of the instrument at full scale is 
Options 
A) 2.0 mH/radian 
B) 4.8 mH/radian 
C) 12.0 mH/radian 
D) 114.6 mH/radian 

Correct Answer 
B 

19 
The output voltage waveform of a threephase
squarewave inverter contains 
Options 
A) only even harmonics 
B) both odd and even harmonics 
C) only odd harmonics 
D) only triplen harmonics


Correct Answer 
C 


20 
If P and Q are two random events, then the
following is TRUE

Options 
A) Independence of P and Q implies that probability
(P
Q ) = 0

B) Probability (P
Q )
Probability (P) + Probability (Q)

C) If P and Q are mutually exclusive, then they must
be independent

D) Probability (P
Q )
Probability (P)


Correct Answer 
D 