1) When ___________ contacts are actuated, they disrupt the power supply through them.
a. normally open type
b. normally closed type
c. both a. and b.
d. none of the above
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Answer
Explanation
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ANSWER: normally closed type
Explanation:
No explanation is available for this question!
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2) The type of memory which is fast and temporarily stores the data which are immediately required for use is called as______.
a. HDD
b. ROM
c. RAM
d. SSD
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Answer
Explanation
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ANSWER: RAM
Explanation:
No explanation is available for this question!
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3) How is the speed of operation of conventional relay system as compared to digital controllers?
a. very slow
b. very fast
c. same
d. almost similar
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Answer
Explanation
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ANSWER: very slow
Explanation:
No explanation is available for this question!
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4) The capability of convention relay systems for complex operations is ___________ that of the PLCs .
a. poor than
b. excellent than
c. as good as
d. unpredictable as
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Answer
Explanation
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ANSWER: poor than
Explanation:
No explanation is available for this question!
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5) How is the noise immunity of PLCs to electrical noises as compared to that of conventional relay controllers?
a. poor
b. excellent
c. as good as noise immunity of conventional relay controllers
d. unpredictable
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Answer
Explanation
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ANSWER: poor
Explanation:
No explanation is available for this question!
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6) __________ of PLCs can be done in very little time.
a. Programming
b. Installation
c. Commissioning
d. All of the above
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Answer
Explanation
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ANSWER: All of the above
Explanation:
No explanation is available for this question!
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7) PLC can be ___________ in plant to change the sequence of operation.
a. only programmed
b. only reprogrammed
c. programmed and reprogrammed
d. able to give a set point
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Answer
Explanation
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ANSWER: programmed and reprogrammed
Explanation:
No explanation is available for this question!
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8) The PLC is used in _______.
a. machine tools
b. automated assembly equipment
c. moulding and extrusion machines
d. all of the above
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Answer
Explanation
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ANSWER: all of the above
Explanation:
No explanation is available for this question!
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9) Which of the following can be the output of PLC?
1. Relay coils
2. Solenoids
3. Indicators
4. Motors
5. Lamps
6. Alarms
a. Only (1), (2), (3) and (4)
b. Only (3), (4), (5) and (6)
c. Only (1), (2), (3) and (5)
d. All the (1), (2), (3), (4), (5), and (6)
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Answer
Explanation
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ANSWER: All the (1), (2), (3), (4), (5), and (6)
Explanation:
No explanation is available for this question!
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10) Which of the following cannot be an input that is given to the PLC?
a. Manual switches
b. Relays
c. Sensors
d. None of the above
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Answer
Explanation
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ANSWER: None of the above
Explanation:
No explanation is available for this question!
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