1.
The input of a controller is
a) Sensed signal
b) Error signal
c) Desired variable value
d) Signal of fixed amplitude not dependent on desired variable value
Answer: b
2. Phase lag controller:
a) Improvement in transient response
b) Reduction in steady state error
c) Reduction is settling time
d) Increase in damping constant
Answer: b
3. Lag compensation leads to:
a) Increases bandwidth
b) Attenuation
c) Increases damping factor
d) Second order
Answer: b
4. Lead compensation leads to:
a) Increases bandwidth
b) Attenuation
c) Increases damping factor
d) Second order
Answer: a
5. Which one of the following is a disadvantage of proportional controller?
A. It destabilises the system
B. It produces offset
C. It makes response faster
D. It has very simple implementation
Answer-A
6. For a linear time invarient system, an optimal controller can be designed if
A. The system is controllable and observable
B. The system is uncontrollable but stable
C. The system is unstable but observable
D. The system is stable but unobservable
Answer -A.The system is controllable and observable
7. A first order dynamic linear system with a proportional controller exhibits an offset to a unit
step input. The offset can be reduced by
A. Decreasing the proportional gain
B. Adding derivative mode
C. Adding integral mode
D. Increasing the proportional gain
Answer-C. Adding integral mode
8.The transfer function of a P-I controller is
A. Kp + Ki/s
B. Kp + ( Ki/s )
C. ( Kp/s ) + Ki . s
D. Kp . s + ( Ki/s )
Answer
B. Kp + ( Ki/s )
9.A controller is basically a.........
A. Sensor
B. Comparator
C. Amplifier
D. Clipper
Answer
B. Comparator
10. Proportional band of a controller is expressed as
A. Percentage
B. Range of control variable
C. Ratio
D. Gain
Answer
A. Percentage
11.The on-off controller is a..........system
A. Digital
B. Linear
C. Non-linear
D. Discontinuous
Answer
C. Non-linear
12.Which of the following is the definition of proportional band of a controller ?
(a) The range of air output as measured variable varies from maximum to minimum
(b) The range of measured variables from set value
(c) The range of measured variables through which the air output chan¬ges from maximum to
minimum
(d) Any of the above
(e) None of the above
Ans: c
13. A signal other than the reference input that tends to affect the value of controlled
variable is known as
(a) disturbance
(b) command
(c) control element
(d) reference input
Ans: a
14. In a control system the output of the controller is given to
(a) final control element
(b) amplifier
(c) comparator
(d) sensor
(e) none of the above
Ans: a
15.In an automatic control system which of the following elements is not used ?
(a) Error detector
(b) Final control element
(c) Sensor
(d) Oscillator
Ans: d
16. In an automatic control system which of the following elements is not used ?
A. Error detector
B. Final control element
C. Sensor
D. Oscillator
D. Oscillator
17. In a control system output of the controller is given to
A. Final control element
B. Amplifire
C. Comparator
D. Sensor
A. Final control element
18. A controller, essentially is a
A. Sensor
B. Clipper
C. Comparator
D. Amplifier
C. Comparator
19. Bimetallic thermostat is ..............controller
A. On-off
B. Zero-term
C. One-term
D. Two-term
A. On-off
20____________ involves a mechanical device that can imitate the actions of people or animals.
a. Automation
B. Robotics
C. Robot
D. Automobile
A
21 compare to human, machine
A. can make more complex decisions based on unexpected circumstances
B. can work in harsher environments
C. make fewer errors
D. (a) and (c)
22.most industrial control application
A. can be solved using more than one method of control
B. can be done more reliably using solid-state methods
C. must have the process specified correctly to be successful
D. All of the above
23. a solenoid:
A. can be used only in de circuits
B. is spring operated
C. is widely used in industrial automation
D. is related to an aneroid
24. __________is delegation of human control functions to technical equipment for increasing
productivity, better quality, reduced cost & increased in safety working conditions.
a. Automation
B. Robotics
C. Robot
D. Automobile
A
25. Which type of control systems used in Automation?
a. Open loop
b. closed loop
c. both
d. none of these
26. types of automation system is
a. 1
b. 2
c.3
d. 4
27. controller used for industrial automation is
a. PID
b. P
c. PI
d. all of above
d
28. The mechanism of control of body temperature is non feedback system?
a) True
b) False
B
29. Benefits of feedback:
a) Performance of system is greater.
b) Need for system much larger path gain and system instability.
c) Controlled variable accurately follows the desired value
d) Affected by parameter variations
D
30. Feedback control systems are:
a) Insensitive to both forward and feedback path parameter changes
b) Less sensitive to feedback path parameter changes than to forward path parameter
changes
c) Less sensitive to forward path parameter changes that to feedback path parameter
changes
d) Equally sensitive to forward feedback path parameter changes
C
31. The closed system has higher ________ than open loop control system, this implies
increased speed of response.
a) Gain
b) Bandwidth
c) Frequency
d) Speed
B
32. Automation is preferred because it:
a) Offers lesser dependence on workers
b) Results in reduction in variable cost
c) Offers easy handling of repetitive work
d) All of the given options
d
33. Product layout is preferably used for:
a) Repetitive processing
b) Intermittent processing
c) Both (a) and (b)
d) Neither (a) nor (b)
a
34. Measurements taken at various points in the transformation process for control purposes are
called:
a) plans
b) directions
c) controls
d) feedback
35. The responsibilities of the operations manager are:
a) planning, organizing, staffing, procuring, and reviewing b) planning, organizing, staffing, directing, and
controlling c) forecasting, designing, planning, organizing, and controlling d) forecasting, designing,
operating, procuring, and reviewing
36. Which one of these was not mentioned in the list of recent trends in operations management? a)
Total quality management b) Worker involvement c) Global competition. d) Automation.
37. The process of comparing outputs to previously established standards to determine if corrective
action is needed is called: a) planning b) directing c) controlling d) budgeting e) disciplining
38. Lag-lead compensation is a:
a) Increases bandwidth
b) Attenuation
c) Increases damping factor
d) Second order
39. Proportional band of a controller is defined as the range of:
a) Measured variable to the set variable
b) Air output as the measured variable varies from maximum to minimum
c) Measured variables through which the air output varies from maximum to minimum
d) None of the above
c
40. The integral control:
a) Increases the steady state error
b) Decreases the steady state error
c) Increases the noise and stability
d) Decreases the damping coefficient
41. In a PID controller, the offset has increased. The integral time constant has to be ___ so as to reduce
offset:
a) Reduced
b) Increased
c) Reduced to zero
d) None of the above
42. Lead compensation leads to:
a) Increases bandwidth
b) Attenuation
c) Increases damping factor
d) Second order
43. The reciprocal of proportional band is called:
(A) Reset
(B) Percent
(C) Minutes per repeat
(D) Gain
44. Which of the motions in actuators are preferred:
a) Translator
b) Rotary
c) Stationary
d) Non-Stationary
B
45. feature of Fixed automation is
a. Low initial investment for custom–Engineered equipment;
b. High production rates;
c. both
d. None of above
46. features that characterize programmable automation are:
a. Low production rates relative to fixed automation;
b. Flexibility to deal with changes in product configuration; and
c. Most suitable for batch production.
d. All of above
47. The features of flexible automation can be summarized as follows:
A. High investment for a custom-engineered system.
B. Medium production rates.
C. Flexibility to deal with product design variations.
D. All of above
D
48. The essential features that distinguish flexible automation from programmable
automation are:
A. the capacity to change part programs with no lost production time; and
B. the capability to changeover the physical setup, again with no lost production
time.
C. Both a and b
D. None of these
C
49. Automation includes automatic machine tools to process parts, automatic assembly
machines, industrial robots, etc.
a. true
b. false
A
50. automation includes three engineering branches-
a mechanical, electronic, and computer
b. mechanical, electrical, and computer
c. mechanical, electronic, and electrical
d. electrical , electronic, and computer
