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IES EC Exam Pattern, IES EC Questions with Answers Page 2

(#M40031874) IES EC QUESTION control system(2006 paper-2 obj) Keep an EYE

Q. Which one of the following is a disadvantage of proportional controller?

a. It destabilizes the system
b. It produces offset
c. It makes response faster
d. It has very simple implementation

Asked In IES EC Chandni Maurya (11 years ago)

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(#M40031873) IES EC QUESTION communication(2006 paper-2 obj) Keep an EYE

Q. Match List I (Modulation) with List II (power input to Antenna in Watts) and select the correct answer using the code given below the lists:

List-I
A. 100% AM
B. 50% AM
C. 1.0% AM
D. FM
List-II
1. 1.5
2. 1.125
3. 1.005
4. 1.00
Codes;

__A B C D
a. 1 2 3 4
b. 2 4 1 2
c. 1 4 3 2
d. 3 2 1 4

Asked In IES EC Chandni Maurya (11 years ago)

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(#M40031872) IES EC QUESTION signal & system (2006 paper-1 obj) Keep an EYE

Q. Which one of the following is the correct statement? The continuous time system described by y(t) = x(t^2) is

a. causal, linear and time-varying
b. causal, non-linear and time-varying
c. non-causal, non-linear and timeinvariant
d. non-causal and time-variant

Asked In IES EC Chandni Maurya (11 years ago)

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(#M40031871) IES EC QUESTION communication (2006 paper-1 obj) Keep an EYE

Match List-I (Application of Signals) with
List-II (Defamation) and select the correct
answer using the code given below
List-I
A. Reconstruction
B. Over sampling
C. Interpolation
D. Decimation
List -II
1. Sampling rate is chosen significantly
greater than the Nyquist rate
2. A mixture of continuous and discrete
time signals
3. To convert the discrete time sequence
back to a continuous time signal and
then resample
4. Assign values between samples and
signals
Codes;
A B C D
a. 3 4 1 2
b. 2 1 4 3
c. 3 1 4 2
d. 2 4 1 3

Asked In IES EC Chandni Maurya (11 years ago)

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(#M40031870) IES EC QUESTION Signal & system (2006 paper-1 obj) Keep an EYE

Q. The impulse response of a system h(n) = a^n u(n). What is the condition for the system to be BIBO stable?

a. a is real and positive
b. a is real and negative
c. | a | > 1
d. | a | < I

Asked In IES EC Chandni Maurya (11 years ago)

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(#M40031869) IES EC QUESTION Instrument (2006 paper-1 obj) Keep an EYE

Q. The sine wave output of a function generator is fed to both the horizontal (X)and vertical (Y) inputs of a CR0. What will be the pattern on the cathode ray screen?
a. A circle
b. An ellipse
c. A straight line with 45° slope
d. Sinusoidal

Asked In IES EC Chandni Maurya (11 years ago)

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(#M40031868) IES EC QUESTION EMT (2006 paper-1 obj) Keep an EYE

Assertion (A): Time varying electric field produces magnetic fields.

Reason (R): Time varying magnetic field produces electric fields.

a. Both A and R are individually true and R is the correct explanation of A.
b. Both A and R are individually true but R is not the correct explanation of A.
c. A is true but R is false
d. A is false but R is true

Asked In IES EC Chandni Maurya (11 years ago)

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(#M40031867) IES EC QUESTION antenna (2006 paper-1 obj) Keep an EYE

Match List-I (Type of Antenna) with List-
II (Example) and select the correct answer
using the code given below the lists:

List I
A. Aperture antenna
B. Circularly polarized antenna
C. Frequency independent antenna
D. Isotropic antenna

List -II
1. Helical antenna
2. Point source
3. Log periodic antenna
4. Microstrip antenna
Codes
___A B C D
a. 3 2 4 1
b. 4 1 3 2
c. 3 1 4 2
d. 4 2 3 1

Asked In IES EC Chandni Maurya (11 years ago)

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(#M40031866) IES EC QUESTION network (2006 paper-1 obj) Keep an EYE

Q. A quarter wave impedance transformers is a terminated by short circuit. What would its input impedance be equal to?
a. The line characteristic impedance
b. Zero
c. Infinity
d. Square root of the line characteristic impedance

Asked In IES EC Chandni Maurya (11 years ago)

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(#M40031865) IES EC QUESTION EMT (2006 paper-1 obj) Keep an EYE

Q. Which one of the following is the correct statement? A rectangular coaxial line can support
a. only TEM mode of propagation
b. both TEM and TE modes of propagation
c. either TE or TM mode of propagation
d. TEM, TE or TM mode of propagation

Asked In IES EC Chandni Maurya (11 years ago)

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