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PLC-HO AGRA-18TH NOVEMBER 2024

1 / 50

The first company to build PLCs was .

2 / 50

The part that monitors the inputs and makes decisions in a PLC is the CPU.

3 / 50

In liquid level and electrical system analogy, voltage is considered analogous to

4 / 50

An OR function implemented in ladder logic uses:

5 / 50

The output of a feedback control system must be a function of

6 / 50

Peripherals are used in PLC to

7 / 50

Normally open contacts are open

8 / 50

Which one of the following in not a final control element.

9 / 50

In a PLC, the scan time refers to the amount of time in which …..

10 / 50

For open control system which of the following statements is incorrect ?

11 / 50

In pneumatic control systems the control valve used as final control element converts

12 / 50

HMI Means ____________Machine Interface. The battery polarity

13 / 50

In closed loop control system, with positive value of feedback gain the overall gain of the system will

14 / 50

Peripherals are used in PLC to

15 / 50

Volatile memory of PLC maintains the information in memory even if the power is interrupted.

16 / 50

Which of the following is the definition of proportional band of a controller ?

17 / 50

Normally open contacts are open

18 / 50

In pneumatic control systems the control valve used as final control element converts

19 / 50

In an automatic control system which of the following elements is not used ?

20 / 50

Regenerative feedback implies feedback with

21 / 50

fg

decreases by the same amount as the gain increase
increase by the sane amount as the gain decrease

The transient response, with feedback system,

22 / 50

Classify the following as automatic control, manual control, discrete control or continuous control.

23 / 50

A good application for a timed interrupt in a PLC program would be:

24 / 50

One of the following is an input device

25 / 50

Which one of the following is not a PLC manufacturer

26 / 50

Due to which of the following reasons excessive band width in control systems should be avoided ?

27 / 50

Which one of the following in not a final control element.

28 / 50

Control system with excessive noise, is likely to suffer from

29 / 50

In an open loop control system

30 / 50

In open loop system

31 / 50

Parallel connections of a ladder logic program are typically called

32 / 50

An OR function implemented in ladder logic uses:

33 / 50

Memory size in a PLC is measured in either bits, bytes or words.

34 / 50

Volatile memory of PLC maintains the information in memory even if the power is interrupted.

35 / 50

In liquid level and electrical system analogy, voltage is considered analogous to

36 / 50

Which one of the following is the reference input minus the primary feedback.

37 / 50

A good control system has all the following features except

38 / 50

Zero initial condition for a system means

39 / 50

Which of the following cannot be an input that is given to the PLC?

40 / 50

One of the following has tendency to oscillate

41 / 50

As a result of introduction of negative feedback which of the following will not decrease ?

42 / 50

Which of the following is the definition of proportional band of a controller ?

43 / 50

The most popular language for PLCs is

44 / 50

Which of the following is an open loop control system ?

45 / 50

Which one of the following increases the steady state accuracy.

46 / 50

PLC, s are………………………………….designed for use in the control of a wide varity of manufacturing machine and system.

47 / 50

Which one of the following is the reference input minus the primary feedback.

48 / 50

For open control system which of the following statements is incorrect ?

49 / 50

When the accumulator value equals the register value, the relay contact is

50 / 50

The acronym PLC stands for: