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MCQ
BASIC ELECTRONICS
CONTROL SYSTEM ENGINEERING
DIGITAL ELECTRONICS
ELECTRICAL CIRCUIT ANALYSIS
ELECTRICAL ENERGY CONSERVATION AND AUDITING
ELECTRICAL ENGINEERING MATERIALS
ELECTRICAL MACHINES
ELECTRICAL WIRING
ELECTROMAGNETICS
MEASUREMENT & INSTRUMENTATION
MICROPROCESSOR AND MICROCONTROLLER INTERFACING
POWER ELECTRONICS & DRIVES
POWER SYSTEM
SIGNALS & SYSTEMS
UTILIZATION OF ELECTRICAL ENERGY
CONTROL SYSTEM ENGINEERING
Q1.
Stability of non linear system depends on
system parameters
initial conditions
nature of input signals
all of these
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Solution
Q2.
Which of the following transfer functions represents under-damped second order systems?
\(\frac{1}{(s^2+3s+1)}\)
\(\frac{4}{(s^2+2s+4)}\)
\(\frac{2}{(s^2+4s+2)}\)
All of the above
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Solution
Q3.
The step response of a system is \((1+e^{-3t})\). It is cascaded with another control block with impulse response of \(e^{-2t}\). The transfer function of the cascaded combination is
\(\frac{1}{s(s+3)}\)
\(\frac{2s+3}{(s+2)(s+3)}\)
\(\frac{2}{(s+1)(s+2)}\)
\(\frac{1}{s(s+2)}\)
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Solution
Q4.
Lead compensator is used to improve _________
Transient Response
Steady state response
Both (A) & (B)
None of the above
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Solution
Q5.
For the block diagram shown in Figure, the transfer function \(\frac{C(s)}{R(s)}\) is__________.
\({G_1}{G_2} - {G_2} - 1\)
\({G_1}{G_2} + {G_2} + 1\)
\(\frac{{G_1}{G_2}} {(1-{G_1}{G_2})}\)
\(\frac{{G_1}{G_2}} {(1+{G_1}{G_2})}\)
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Solution
Q6.
A band limited signal is sampled at Nyquist rate. The signal can be recovered by passing the sample through
An RC filter
An envelope detector
A PLL
An ideal LPF with the appropriate bandwidth
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Solution
Q7.
In a open loop system, the control action
depends on size of the system
depends on system variables
depends on the input signal
is independent of the output
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Solution
Q8.
Given a unity feedback system with \(G(s) = \frac{k}{s(s+4)}\), the value of k for Damping Ratio of 0.5 is
1
4
16
64
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Solution
Q9.
Number of roots in left half of s-plane of the characteristic equation \(s^3– 4s^2 + s + 6 = 0\) is
2
3
1
0
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Solution
Q10.
For a second order system, natural frequency of oscillation is 10 rad/s and damping ratio is 0.1. What is the 2% settling time?
4 second
10 second
0.4 second
40 second
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Solution
1
2
3
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