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Q.1 Consider the closed loop control system as shown in figure below.
The closed loop poles of the system are
a. –4, –10
b. –4, –6
c. –4, 6
d. –4, 10
Attem pt Correct Correct Ans. b
FAQ? Have any doubt? Solution
Q.2 Relationship between input x(t) and output y(t) of a system is given as
The transfer function of this system is
a.
b.
c.
d.
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Attem pt Correct Correct Ans. a
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Q.3 Consider the block diagram shown below
The transfer function is:
a.
b.
c.
d.
Attem pt Correct Correct Ans. b
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Q.4 The signal flow graph of the system is shown in the given figure. The transfer
function of the system is
a.
b.
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c.
d.
Attem pt Correct Correct Ans. c
FAQ? Have any doubt? Solution
Q.5 The order of a system whose open loop transfer function given by
is ___________.
Attem pt Correct Correct Ans. 3
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Q.6 The value of C/R is _____
(assume G1 = 2, G2 = 9, G3 = 5, G4 = 1 also H1 = H2 = 4 and H3 = 6)
Attem pt Incorrect Your Ans. .126 Correct Ans. 0.06 (0.07 0.05)
FAQ? Have any doubt? Solution
Q.7 Consider the signal flow graph in the figure shown below
then the transfer function is equal to __________.
Attem pt Correct Correct Ans. 1
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Q.8 The signalflow graph shown in figure below has:
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a. three forward paths and two nontouching loops
b. three forward paths and three nontouching loops
c. two forward paths and two nontouching loops
d. two forward paths and three loops
Attem pt Correct Correct Ans. a
FAQ? Have any doubt? Solution
Q.9 Consider the block diagram shown in the figure.
The overall gain of the block diagram shown below is
a.
b.
c.
d.
Attem pt Correct Correct Ans. c
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Q.10
A forcing function (t2 – 2t) u(t – 1) is applied to a linear system. The Laplace
transform of the forcing function is
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a.
b.
c.
d.
Attem pt Correct Correct Ans. d
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Q.11 The signal flow graph for a system is given below. The transfer function Y(s)/U(s)
for this system is given as
a.
b.
c.
d.
Attem pt Correct Correct Ans. a
FAQ? Have any doubt? Solution
Q.12 Consider a system with input r (t) and output y(t). The system can be described by
the differential equation
The state diagram with zero initial condition can be represented as
a.
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b.
c.
d.
Attem pt Correct Correct Ans. b
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Q.13
The overall gain of the signal flow graph shown below is _____________.
Attem pt Correct Correct Ans. 1.93 (1.85 1.97)
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Q.14 A control system with certain excitation is governed by the following
mathematical equation,
where y is the input and x is the output,
The sum of the time constants of the response of the system is _______ sec.
Attem pt Incorrect Your Ans. 22 Correct Ans. 9
FAQ? Have any doubt? Solution
Q.15 The block diagram of a second order system is given below
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The closed loop dc gain of the system is ___________
Attem pt Correct Correct Ans. 0.04 (0.02 0.06)
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Q.16 Consider the following signal flow graph of the system:
The values of k1 for which the system has poles at the points (–2 ± j 2) is
_______.
Attem pt Incorrect Your Ans. 1 Correct Ans. 5
FAQ? Have any doubt? Solution
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