Questions
1
Which of the following should be done to make an unstable system stable ?
Answer: The gain of the system should be increased
2
Which of the following devices are commonly used as error detectors in instruments ?
Answer: Any of the above
4
By which of the following the control action is determined when a man walks along a path ?
Answer: Eyes
5
Is a part of the human temperature control system.
Answer: Perspiration system
6
A closed loop system is distinguished from open loop system by which of the following ?
Answer: Feedback
7
Any externally introduced signal affecting the controlled output is called a
Answer: stimulus
9
A control system working under unknown random actions is called
Answer: stochastic control system
10
The initial response when tne output is not equal to input is called
Answer: Transient response
11
A car is raining at a constant speed of 50 km/h, which of the following is the feedback element for the driver ?
Answer: Needle of the speedometer
12
A good control system has all the following features except
Answer: slow response
15
Which of the following statements is not necessarily correct for open control system ?
Answer: Presence of non-linearities causes malfunctioning
16
Which of the following is an open loop control system ?
Answer: Field controlled D.C. motor
17
In closed loop control system, with positive value of feedback gain the overall gain of the system will
Answer: decrease
18
A control system in which the control action is somehow dependent on the output is known as
Answer: Closed loop system
19
For open control system which of the following statements is incorrect ?
Answer: Recalibration is not required for maintaining the required quality of the output
20
In an open loop control system
Answer: Output is independent of control input
