Computer Aided Manufacturing (2171903) MCQs

MCQs of Programmable Logic Controllers

Showing 11 to 20 out of 35 Questions
1 2 3 4
11.

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
Answer:

Option (c)

12.

The PLC is used in _______.

(a)

machine tools
(b)

automated assembly equipment
(c)

molding and extrusion machines
(d)

all of the mentioned
Answer:

Option (d)

13.

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)
Answer:

Option (d)

14.

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 mentioned
Answer:

Option (d)

15.

The most popular language for PLCs is

(a)

ladder diagram
(b)

C++
(c)

OOP+
(d)

VHDL
Answer:

Option (a)

16.

Very often relays and valves are connected to

(a)

input modules
(b)

output modules
(c)

any of these
Answer:

Option (b)

17.

An OR function implemented in ladder logic uses

(a)

normally-closed contacts in series
(b)

normally-open contacts in series
(c)

normally-open contacts in parallel
(d)

normally-closed contacts in parallel
Answer:

Option (c)

18.

Parallel connections of a ladder logic program are typically called

(a)

branches
(b)

loops
(c)

inputs
(d)

outputs
Answer:

Option (a)

19.

Which is the type and styles of switches?

(a)

Locking and nonlocking
(b)

Normally open and normally closed
(c)

Single pole and multiple pole
(d)

All of the mentioned
Answer:

Option (d)

20.

A switch whose operation is activated by an electromagnet is called

(a)

solenoid
(b)

relay
(c)

Indicator
(d)

sensor
Answer:

Option (b)

Showing 11 to 20 out of 35 Questions
1 2 3 4