Machine Dynamics

Closed-Loop Transfer Function

Question 1
Marks : +2 | -2
Pass Ratio : 100%
The initial response when the output is not equal to input is called
Transient response
Error response
Dynamic response
None of the mentioned
Explanation:
Transient response of control system means changing so, this occurs mainly after two conditions and these two conditions are
Question 2
Marks : +2 | -2
Pass Ratio : 100%
Which of the following should be done to make an unstable system stable ?
The gain of the system should be decreased
The gain of the system should be increased
The number of poles to the loop transfer function should be increased
The number of zeros to the loop transfer function should be increased
Explanation:
By increasing the gain of the system the unstable system can be stabalized.
Question 3
Marks : +2 | -2
Pass Ratio : 100%
A control system working under unknown random actions is called
computer control system
digital data system
stochastic control system
adaptive control system
Explanation:
Adaptive control is the control method used by a controller which must adapt to a controlled system with parameters which vary, or are initially uncertain. Stochastic control system is a control system working under unknown random actions.
Question 4
Marks : +2 | -2
Pass Ratio : 100%
Which of the following devices are commonly used as error detectors in instruments ?
Vernistats
Microsyns
Resolvers
None of the mentioned
Explanation:
The commonly used error detectors are self-balancing recording potentiometer, hot wire anemometer, eloctro-magnetic flow meter, torque sensor etc.
Question 5
Marks : +2 | -2
Pass Ratio : 100%
By which of the following the control action is determined when a man walks along a path ?
Brain
Hands
Legs
Eyes
Explanation:
Walking id done through legs, so legs are only responsible.
Question 6
Marks : +2 | -2
Pass Ratio : 100%
______________ is a part of the human temperature control system.
Digestive system
Perspiration system
Ear
Leg movement
Explanation:
Digestive system controls the digestion of food, ear is to get the sound and leg movement is controlled by brain. So, perspiration system only controls human body temperature.
Question 7
Marks : +2 | -2
Pass Ratio : 100%
Any externally introduced signal affecting the controlled output is called a
feedback
stimulus
signal
gain control
Explanation:
The instrument measuring the output of the machine for comparison with the input to the machine is known as feedback. Any externally introduced signal affecting the controlled output is called a stimulus.
Question 8
Marks : +2 | -2
Pass Ratio : 100%
A closed loop system is distinguished from open loop system by which of the following ?
Servomechanism
Feedback
Output pattern
Input pattern
Explanation:
In open loop system we do not have any feedback but in closed loop system we have feedback.
Question 9
Marks : +2 | -2
Pass Ratio : 100%
An automatic toaster is a __________ loop control system.
open
closed
partially closed
none of the mentioned
Explanation:
The output of a toaster is not dependent on the input of the toaster. Hence, it is a open loop control system.
Question 10
Marks : +2 | -2
Pass Ratio : 100%
_______________ is a closed loop system.
Auto-pilot for an aircraft
Direct current generator
Car starter
Electric switch
Explanation:
Auto-pilot for an aircraft is a closed loop system as the input is totally dependent on the output whichever is required.