Industrial Automation
1. The electromagnetic
relays are constructed with _______
- A. Electrical components
- B. Mechanical components
- C. Electromechanical components
- D. None of the above
2. In PLC the user can
write the programs with the help of ________
A. Optical isolation
B. Sensing devices
C. Programming devices
D.
None of the above
3. A system that
regulates or commands itself
A.
Open-loop
B. Closed-loop
C. Both open-loop and
closed-loop
D.
Control system
4. In which control
system feedback is available?
A.
Open-loop
B.
Close-loop
C.
Both Open-loop and Close-loop
D.
None of the above
5. Why programmable
logic controllers are required?
A.
It reduces the efforts
of human begins
B.
To get the maximum
efficiency
C.
To reduce the complex
circuitry of entire system
D.
All of the above
6. Which mode accepts
and converts signals from sensors into a logic signal?
A.
Input module
B.
Output modular
C.
Both Input and Output
modules
D.
None of the above
7. The programmable
logic controller works on __________
A.
Parallel mechanism
B.
Sequential mechanism
C.
Both Mixed mechanism
D.
None of the above
8.
_________ provides the voltage to PLC primary components
A.
Control valve
B.
Level transmitter
C.
Flow transmitter
D.
Power supply Unit
9. The CPU consists of
_________
A.
Arithmetic Logic Unit
B.
Internal memory of CPU
C.
Internal timers,
counters, flags
D.
All of the above
10. What are the
components that make the programmable logic controller work?
A.
Power supply
B.
CPU
C.
Input and Output module
D.
All of
the above
11.
For ON delay timer, which
programming bit will be ON after the timer finishes timing?
A.
Timing bit
B.
Enable bit
C.
Done bit
D.
All
12.
For ON delay timer,
which programming bit will be ON when input is ON and stays on until the timer
finishes timing?
A.
Timing bit
B.
Enable bit
C.
Done bit
D.
All
13.
For OFF delay timer,
which programming bit will be ON if the input is ON and OFF if the input is
OFF.
A.
Timing bit
B.
Enable bit
C.
Done bit
D.
All
14.
For ON delay timer,
which programming bit will be ON if the input is ON and OFF if the input is
OFF.
A.
Timing bit
B.
Enable bit
C.
Done bit
D.
All
15.
Which one of the
following is not a continuous type
controller?
A.
PID controller
B.
PD controller
C.
PLC
D.
None
16.
What do we mean by
designing a PID controller?
A.
Purchasing PID
hardware component
B.
Calculating gain values
C.
Preparing ladder logic
diagram
D.
None
17.
Which gain decides how
much correction has to be done on a given system when error happens?
A.
Proportional gain
B.
Integral gain
C.
Derivative gain
D.
All
18.
Which gain decides how
long the correction has to be done on a given system when error happens?
A.
Proportional gain
B.
Integral gain
C.
Derivative gain
D.
All
19.
Which gain decides how
fast the correction has to be done on a given system when error happens?
A.
Proportional gain
B.
Integral gain
C.
Derivative gain
D.
All
20.
For a given closed
loop continuous control system, is it mandatory to use all the three modes
(PID) ?
A.
Yes, it is mandatory
B.
No, some systems may not need all the three
modes
C.
No, always use only
one mode controller
D.
None
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