# Signal Reconstruction MCQ’s

This set of Control Systems Multiple Choice Questions & Answers (MCQs) focuses on “Signal Reconstruction”.

1. The first step required to convert analog signal to digital is :
a) Sampling
b) Holding
c) Reconstruction
d) Quantization

2. Sampling is necessary :
a) In complex control systems
b) Where high accuracy is required
c) Non automated control systems
d) Automated control system

3. Sampling can be done by:
a) Impulse train sampling
b) Natural sampling
c) Flat-top sampling
d) All of the mentioned

4. Sampled data technique is appropriate as:
a) For long distance data transmission
b) Pulses are transferred by little loss of accuracy
c) More than one channel of information is sequentially sampled and transmitted.
d) All of the mentioned

5. The use of sampled data control system are:
a) For using analog components as the part of the control loop
b) For time division of control components
c) Whenever a transmission channel forms a part of closed loop
d) None of the mentioned

6. For the successful reconstruction of signals :
a) Sampling frequency must be equal to the message signal
b) Sampling frequency must be greater to the message signal
c) Sampling frequency must be less to the message signal
d) Sampling frequency must be greater than or equal to the message signal

7. Signal sampling reduces the power demand made on the signal.
a) True
b) False

8. _______________ is a sampling pattern which is repeated periodically
a) Single order sampling
b) Multi order sampling
c) Zero order sampling
d) Unordered sampling

9. The signal is reconstructed back with the help of
a) Zero order hold circuits
b) Extrapolations
c) Signal is reconstructed with zero order holds and extrapolations
d) Signal is not reconstructed

10. Aliasing is caused when:
a) Sampling frequency must be equal to the message signal
b) Sampling frequency must be greater to the message signal
c) Sampling frequency must be less to the message signal
d) Sampling frequency must be greater than or equal to the message signal

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