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3rd September 2014, 10:25 AM
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Join Date: Apr 2013
Re: IES Electrical Exam Question Paper

Here is the list of few questions of IES Electrical Exam for your idea.
1. A set of independent current
measurements taken by four observers was
recorded as: 117.02 mA, 117.11 mA,
117.08 mA and 117.03 mA. What is the
range of error?
a. ± 0045
b. ± 0054
c. ± 0065
d. ± 0056
2. The reference voltage and the input
voltage are sequentially connected to the
integrator with the help of a switch in a
a. Successive approximation A/D
converter
b. Dual slope integration A/D converter
c. Voltage to time converter
d. Voltage to frequency converter
3. A single channel digital storage
oscilloscope uses a 12 bit, 108 samples/s
ADC. For a 10 kHz sine wave input, what
is the number of samples taken per cycle
of input?
a. 1012
b. 108
c. 104
d. 102
4. Consider the signal:
Vm sin 100t + 2 Vm sin 200t
to be sampled and stored in a data
acquisition system. The same is to be
extracted off-line later on. In order to
extract the signal effectively, the original
sampling frequency has to be
a. 100 rad/s
b. 200 rad/s
c. 210 rad/s
d. 2 2 100 200 + rad/s
5. Which one of the following transmission
systems for telemetry has largest
bandwidth?
a. FM/FM radio transmission system
b. Co-axial copper cables transmission
system
c. Fibre-optic data transmission system
d. Synchro-position repeater system
6. Why are dummy strain gauges employed?
a. For calibration of strain gauges
b. For increasing the sensitivity of the
bridge
c. For compensation of temperature
variations
d. For neutralizing the influence of bridge
voltage supply variations
7. Match List I (Type of DVM) with List II
(Sub-component in ADC) and select the
correct answer using the codes given
below the lists:
List I
A. Ramp type
B. Dual-slope
C. Servo-type
D. Successive approximation
List II
1. DAC
2. Voltage to time converter
3. Pulse-generator
4. Potentiometer
5. Capacitor
Codes;
A B C D
a. 2 1 4 5
b. 4 5 3 1
c. 2 5 4 1
d. 4 1 3 5
8. In modern electronic multi meter a FET or
MOSFET is preferred over BJT because
a. Its input resistance is low
b. Its input resistance is high
c. Its input resistance is high and does not
vary with the change of range
d. It is cheaper
\9. Which of the following bridges can be
used for inductance measurement?
1. Maxwell’s bridge 2. Schering bridge
2. Wein bridge 4. Hay’s bridge
3. Wheatstone bridge
Select the correct answer using the codes
given below
a. 1 and 2
b. 2 and 3
c. 3, 4 and 5
d. 1 and 4
10. Match List I (Frequency) with List II
(Detector) and select the correct answer
using the codes given below the lists
List I
A. Zero frequency
B. 50 Hz
C. 1200 Hz
D. 10 kHz
List II
1. Head phone
2. D’Arsonval galvanometer
3. Cathode ray oscilloscope
4. Vibration galvanometer
5. Ballistic galvanometer
Codes;
A B C D
a. 2 1 5 3
b. 3 4 1 2
c. 2 4 1 3
d. 3 1 5 2
11. Which of the following factors decide the
accuracy in a bridge measurement?
1. Accuracy of the null indicator
2. Accuracy of the bridge components.
3. Sensitivity of the null indicator.
4. Applied voltage to the bridge system.
Select the correct answer using the code
given below
a. 1 and 2
b. 2 and 3
c. 3 and 4
d. 1 and 3
12. Match List I (Material Used in
Instruments) with List II (Purpose) and
select the correct answer using the code
given below the lists:
List I
A. Phosphor-bronze
B. Manganin
C. Aluminium
D. Eureka
List II
1. Coils
2. Discs
3. Control Springs
4. Shunts
5. Multipliers
Codes;
A B C D
a. 3 5 2 4
b. 2 4 1 5
c. 3 4 2 5
d. 2 5 1 4
13. Match List I (type of Electronic
Voltmeter) with List II (Major
Characteristic) and select the correct
answer using the code given below the
lists:
List I
A. Amplifier-rectifier
B. Rectifier-amplifier
C. True R.M.S.
D. Logarithmic
List II
1. Wide input-signal dynamic range
2. High sensivity, limited bandwidth
3. Limited sensivity, large bandwidth
4. Capability to read non-sinusoidal ac
Codes;
A B C D
a. 4 1 2 3
b. 2 3 4 1
c. 4 3 2 1
d. 2 1 4 3
14. What is the effect of inductance in the
pressure coil on performance of a
dynamometer type wattmeter?
a. It reads low on lagging power factor
and high on leading power factor
b. It reads high on lagging power factor
and low on leading power factor
c. Its reading is not affected at all
d. It always reads low

15. To measure 5 volts, if one selects a 0 - 100
volt range voltmeter which is accurate
within ± 1%, then the error in this
measurement may be up to
a. ± 1.5%
b. ± 2.5%
c. ± 7.5%
d. ± 20%
16. Consider the following statements with
regard to the bandwidth of a closed-loop
system:
1. In systems where the low frequency
magnitude is 0 dB h the Bode diagram,
the bandwidth is measured at the -3dB
frequency.
2. The bandwidth of the closed loop
control system is a measurement of the
range of fidelity of response of the
system.
3. The speed of response to a step input is
proportional to the bandwidth.
4. The system with the larger bandwidth
provides slower step response and
lower fidelity ramp response.
Which of the statements given above are
correct?
a. 1, 2 and 3
b. 1, 2 and 4
c. 1, 3 and 4
d. 2, 3 and 4
17. Consider the following statements:
A first order system with a proportional
controller exhibits an offset to a step input.
In order to reduce the offset, it is necessary
to
1. Increase the gain of proportional
controller.
2. Add a derivative mode.
3. Add an -integral mode.
Select the correct answer using the code
given below
a. 1, 2 and 3
b. 1 and 2
c. 2 and 3
d. 1 and 3
18. Match List I (Nyquist Plot of Loop
Transfer Function of a Control System)
with List II (Gain Margin in dB) and select
the correct answer using the code given
below the Lists
List I
A. Does not intersect the negative real
axis
B. Intersects the negative real axis
between 0 and (-1, jo)
C. Passes through (-1, jo)
D. Encloses (-1, jo)
List II
1. > 0
2. ∞
3. < 0
4. 0
Codes;
A B C D
a. 2 4 1 3
b. 3 1 4 2
c. 2 1 4 3
d. 3 4 1 2
19. Which one of the following is the steady
state error of a control system with step
error, ramp error and parabolic error
constants kp, kv and ka respectively for the
input (1 - t2) μ(t)?
a. 3 3
1 2 p a k k

+
b. 3 6
1 2 p a k k
+
+
c. 3 3
1 2 p a k k

+
d. 3 6
1 2 p a


For more questions , here is the attachment
Attached Files
File Type: pdf IES Electrical Exam Paper.pdf (654.0 KB, 172 views)


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