Signal Classification and Properties – 1 MCQ’s

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This set of Signals & Systems Multiple Choice Questions & Answers (MCQs) focuses on “Signal Classification and Properties – 1″.

1. What is the period of the following signal, x(t) = sin(18*pi*t + 78 deg)?
a) 19
b) 29
c) 13
d) 49

2. Which of the following signals is monotonic?
a) x(t) = t3 – 2t
b) x(t) = sin(t)
c) x(t) = sin22(t) + cos22(t) – 2t
d) x(t) = log(cos(t))

3. Which of the following signals are monotonic in nature?
a) 1-exp(-t)
b) 1-exp(sin(t))
c) log(tan(t))
d) cos(t)

4. For the signal, x(t) = log(cos(a*pi*t+d)) for a = 50 Hz, what is the time period of the signal, if periodic?
a) 0.16s
b) 0.08s
c) 0.12s
d) 0.04s

5. For a bounded function, is the integral of the function from -infinity to +infinity defined and finite?
a) Yes
b) Never
c) Not always
d) None of the mentioned

6. For a double sided function, which is odd, what will be the integral of the function from -infinity to +infinity equal to?
a) Non-zero Finite
b) Zero
c) Infinite
d) None of the mentioned

7. What are the steady state values of the signals, 1-exp(-t), and 1-k*exp(-k*t)?
a) 1, k
b) 1, 1/k
c) k, k
d) 1, 1

8. For the signal x(t) = a – b*exp(-ct), what is the steady state value, and the initial value?
a) c, b
b) c, c-a
c) a, a-b
d) b, a-b

9. Find where the signal x(t) = 1/(t2 – 3t + 2) finds its maximum value between (1.25, 1.75):
a) 1.40
b) 1.45
c) 1.55
d) 1.50

10. Is the signal x(t) = exp(-t)*sin(t) periodic in nature?
a) Yes
b) No

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