Friday, August 24, 2012

Control Systems Objective MCQ Answers

1. An impulse function is a derivative of  __ function
a) Parabolic
b) Step
c) Ramp
d) Linear


2. The required for the response to rise and stay within the tolerance band is called as:
a) Rise time
b) Pickup time
c) Settling time
d) Transient time


3. The time required for the response to rise from 10% to 90% of the final value for over damped systems and 0 to 100% of the final value for under damped systems is called the:
a) Rise time
b) Pickup time
c) Settling time
d) Transient time


4. Control systems are normally designed with a damping factor:
a) Less than unity
b) Of unity
c)  Of Zero
d) More than unity


5. A signal whose value changes from one level to other level in no time is known as __ signal
a) Impulse
b) Step
c) Ramp
d) Parabolic


6. The overshoot (an indication of the largest error between the actual and desired output) is the ratio of:
a) Transient error to peak error
b) Dynamic error to peak error
c) Maximum overshoot to final desired value
d) None of the above


7. Error constants of the system are measure of:
a) Relative stability
b) Transient state response
c) Steady state response
d) Steady state as well as transient state response


8. ___ gives indication how fast the system tends to attain the final value
a) Delay time
b) Rise time
c) Time constant
d) Settling time


9. A signal flow graph is a:
a) Special type of graph for analyzing the modern control system
b) Pictorial representation of the simultaneous equations describing a system
c) Polar graph
d) Log log graph


10. The basic property of the signal flow graph is/are:
a) It is applicable to linear system only
b) Nodes are arranged from left to right in a sequence
c) Signals travel along  branches only in the marked direction and is multiplied by the branch again
d) The algebraic equations must be in the form of cause and effect relationship
e) All the above