1. The most commonly used input signal in control system is
a) step function
b) ramp or velocity
c) accelerating function
d) all the above
ans: a
2. What is the characteristic of a good control system?
a) Sensitive to parameter variation
b) insensitive to input commands
c) Neither sensitive to parameter variation nor sensitive to input commands
d) Insensitive to parameter variation but sensitive to input commands
ans: d
3. Linear system obeys
a) principle of maximum power transfer
b) reciprocity principle
c) principle of superposition
d) all the above
ans: d
4. If a linear time invariant system is excited by a true random signal like white noise, the output of the linear system will have which of the following properties ?
a) output will be a white noise
b) output will be periodic
c) output will not be random
d) output will be correlated or colored noise.
ans: c
5. A system can be completely described by a transfer if it is
a) nonlinear and continuous
b) linear and time-varying
c) non-linear and time-invariant
d) linear and time-invariant
ans: d
6. A function of one or more variables which conveys information on the nature of physical phenomenon called
a) noise
b) interference
c) system
d) signal
ans: d
7. If the initial conditions for a system are inherently zero , what does it physically mean?
a) The system is at rest but stores energy
b) The system is working but does not store energy
c) The system is at rest or no energy is stored in any of its parts
d) The system is working with zero reference input
ans: d
8. In a control system, the use of negative feedback
a) eliminates the chances of instability.
b) increases the reliability.
c) reduces the effects of disturbance and noise signals in the forward path.
d) increases the influence of variations of component parameters on the system performance.
ans: c
9. which one of the following effects in the system is NOT caused by negative feedback?
a) Reduction in gain
b) increase in bandwidth.
c) increase in distortion.
d) reduction in output impedance.
ans: c
10. In a speed control system , output rate feedback is used to
a) limit the speed of motor.
b) limit the acceleration of the motor
c) reduce the damping of the system
d) increase the gain margin.
ans: c
a) step function
b) ramp or velocity
c) accelerating function
d) all the above
ans: a
2. What is the characteristic of a good control system?
a) Sensitive to parameter variation
b) insensitive to input commands
c) Neither sensitive to parameter variation nor sensitive to input commands
d) Insensitive to parameter variation but sensitive to input commands
ans: d
3. Linear system obeys
a) principle of maximum power transfer
b) reciprocity principle
c) principle of superposition
d) all the above
ans: d
4. If a linear time invariant system is excited by a true random signal like white noise, the output of the linear system will have which of the following properties ?
a) output will be a white noise
b) output will be periodic
c) output will not be random
d) output will be correlated or colored noise.
ans: c
5. A system can be completely described by a transfer if it is
a) nonlinear and continuous
b) linear and time-varying
c) non-linear and time-invariant
d) linear and time-invariant
ans: d
6. A function of one or more variables which conveys information on the nature of physical phenomenon called
a) noise
b) interference
c) system
d) signal
ans: d
7. If the initial conditions for a system are inherently zero , what does it physically mean?
a) The system is at rest but stores energy
b) The system is working but does not store energy
c) The system is at rest or no energy is stored in any of its parts
d) The system is working with zero reference input
ans: d
8. In a control system, the use of negative feedback
a) eliminates the chances of instability.
b) increases the reliability.
c) reduces the effects of disturbance and noise signals in the forward path.
d) increases the influence of variations of component parameters on the system performance.
ans: c
9. which one of the following effects in the system is NOT caused by negative feedback?
a) Reduction in gain
b) increase in bandwidth.
c) increase in distortion.
d) reduction in output impedance.
ans: c
10. In a speed control system , output rate feedback is used to
a) limit the speed of motor.
b) limit the acceleration of the motor
c) reduce the damping of the system
d) increase the gain margin.
ans: c
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