Control Systems

31. In a control system integral error compensation steady state error

1. increases
2. minimizes
3. does not have any effect on
4. any of the above

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32. In a control system the output of the controller is given to

1. final control element
2. amplifier
3. comparator
4. sensor

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33. In a stable control system backlash can cause which of the following?

1. Underdamping
2. Overdamping
3. Poor stability at reduced values of open loop gain
4. Low-level oscillations

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34. In a system low friction co-efficient facilitates

1. reduced velocity lag error
2. increased velocity lag error
3. increased speed of response
4. reduced time constant of the system

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35. In a system zero initial condition means that

1. The system is at rest and no energy is stored in any of its components
2. The system is working with zero stored energy
3. The system is working with zero reference signal
4. any of the above

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36. In an automatic control system which of the following elements is not used?

1. Error detector
2. Final control element
3. Sensor
4. Oscillator

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37. In an open loop control system

1. Output is independent of control input
2. Output is dependent on control input
3. Only system parameters have effect on the control output
4. None of the above

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38. In case of type-1 system steady state acceleration is

1. unity
2. infinity
3. zero
4. 10

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39. In closed loop control system, with positive value of feedback gain the overall gain of the system will

1. decrease
2. increase
3. be unaffected
4. any of the above

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40. In electrical-pneumatic system analogy the current is considered analogous to

1. velocity
2. pressure
3. air flow
4. air flow rate

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