Q1. Choose the correct answer 1. Which among the following is not an advantage of an open loop system? a. Simplicity in construction & design b. Easy maintenance c. Rare problems of stability d. Requirement of system recalibration from time to time
Q1. Choose the correct answer 1. Which among the following is not an advantage of an open loop system? a. Simplicity in construction & design b. Easy maintenance c. Rare problems of stability d. Requirement of system recalibration from time to time
Power System Analysis and Design (MindTap Course List)
6th Edition
ISBN:9781305632134
Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Chapter12: Power System Controls
Section: Chapter Questions
Problem 12.3P
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Q1. Choose the correct answer
1. Which among the following is not an advantage of an open loop system?
a. Simplicity in construction & design
b. Easy maintenance
c. Rare problems of stability
d. Requirement of system recalibration from time to time
2. Which notation represents the feedback path in closed loop system representation?
a. b(t)
b. c(t)
c. e(t)
d. r(t)
3. Which among the following represents an illustration of closed loop system?
a. Automatic washing machine
b. Automatic electric iron
c. Bread toaster
d. Electric hand drier
4. Transfer function of the system is defined as the ratio of Laplace output to Laplace input considering initial conditions________
a) 1
b) 2
c) 0
d) infinite
Feedback can always reduce the effects of noise and disturbance on system performance?
a) True
b) False
6. Which among the following is not an advantage of an open loop system?
a. Simplicity in construction & design
b. Easy maintenance
c. Rare problems of stability
d. Requirement of system recalibration from time to time
7. Match the following notations with their meanings:
G(s) ——— - 1) Laplace of error signal
H(s) ——— - 2) Laplace of output signal.
C(s) ——— - 3) Forward transfer function.
E(s) ——— - 4) Feedback transfer function
a. A- 2, B- 3, C- 1, D- 4 b. A- 3, B- 4, C- 2, D- 1
c. A- 2, B- 3, C- 4, D- 1 d. A- 1, B- 2, C- 3, D- 4
8. The output of a feedback control system must be a function of
a. reference and output
b. reference and input
c. input and feedback signal
d. output and feedback signal
10. For open control system which of the following statements is incorrect?
a. Less expensive
b. Recalibration is not required for maintaining the required quality of the output
c. Construction is simple and maintenance easy
d. Errors are caused by disturbances
11.the closed loop system is.
a. Autopilot for an aircraft b. Direct current generator
c. Car starter d. Electric switch
12. In regenerating the feedback, the transfer function is given by
a. C(s)/R(s)=G(s)/1+G(s)H(s)
b. C(s)/R(s)=G(s)H(s)/1-G(s)H(s)
c. C(s)/R(s)=G(s)/1+G(s)H(s)
d. C(s)/R(s)=G(s)/1-G(s)H(s)
Q2. Determine the output C due to inputs R, U1 and U2 using the Superposition Method
Q3. Consider a system with the mathematical model given by the following differential equation. Find the transfer function of the system.
Q4. Consider the following control system , find the transfer function E(s)/ R(s)
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