Computer Aided Manufacturing (2171903) MCQs

MCQs of Programmable Logic Controllers

Showing 31 to 35 out of 35 Questions
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31.

A ladder diagram is composed of _____ each controlling _____.

(a)

one or more rungs, a JSR
(b)

one or more rungs, one output
(c)

only one rung, one output
(d)

none of the mentioned
Answer:

Option (b)

32.

Ladder contacts can be programmed in

(a)

series-parallel
(b)

series or parallel
(c)

all of the mentioned
Answer:

Option (c)

33.

Timers may have one or more _____ for their reference timing.

(a)

time bases
(b)

analog outputs
(c)

analog inputs
(d)

unlatch inputs
Answer:

Option (a)

34.

Counters can have outputs that turn ON when the accumulated count _____ the pre-set count.

(a)

is equal to
(b)

is less than
(c)

is greater than
(d)

is equal to or less than or greater than
Answer:

Option (d)

35.

In today’s automation control world 

(a)

SCADA does the bulk of the machine control
(b)

PLCs do the bulk of the machine control
(c)

neither only relays control machines
(d)

none of the mentioned
Answer:

Option (b)

Showing 31 to 35 out of 35 Questions
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