ALL THE BEST!!!
PLC-HO AGRA-18TH NOVEMBER 2024
1 / 50
In an automatic control system which of the following elements is not used ?
2 / 50
In pneumatic control systems the control valve used as final control element converts
3 / 50
Control system with excessive noise, is likely to suffer from
4 / 50
An OR function implemented in ladder logic uses:
5 / 50
Due to which of the following reasons excessive band width in control systems should be avoided ?
6 / 50
The acronym PLC stands for:
7 / 50
The first company to build PLCs was .
8 / 50
The most popular language for PLCs is
9 / 50
In liquid level and electrical system analogy, voltage is considered analogous to
10 / 50
Classify the following as automatic control, manual control, discrete control or continuous control.
11 / 50
In open loop system
12 / 50
Which of the following is the definition of proportional band of a controller ?
13 / 50
Which one of the following in not a final control element.
14 / 50
For open control system which of the following statements is incorrect ?
15 / 50
In closed loop control system, with positive value of feedback gain the overall gain of the system will
16 / 50
Volatile memory of PLC maintains the information in memory even if the power is interrupted.
17 / 50
Which one of the following is the reference input minus the primary feedback.
18 / 50
19 / 50
Normally open contacts are open
20 / 50
The output of a feedback control system must be a function of
21 / 50
22 / 50
Peripherals are used in PLC to
23 / 50
One of the following is an input device
24 / 50
Regenerative feedback implies feedback with
25 / 50
The part that monitors the inputs and makes decisions in a PLC is the CPU.
26 / 50
Parallel connections of a ladder logic program are typically called
27 / 50
28 / 50
Which one of the following increases the steady state accuracy.
29 / 50
Which of the following cannot be an input that is given to the PLC?
30 / 50
31 / 50
32 / 50
33 / 50
Memory size in a PLC is measured in either bits, bytes or words.
34 / 50
As a result of introduction of negative feedback which of the following will not decrease ?
35 / 50
36 / 50
37 / 50
When the accumulator value equals the register value, the relay contact is
38 / 50
39 / 50
Which one of the following is not a PLC manufacturer
40 / 50
41 / 50
HMI Means ____________Machine Interface. The battery polarity
42 / 50
Zero initial condition for a system means
43 / 50
A good application for a timed interrupt in a PLC program would be:
44 / 50
One of the following has tendency to oscillate
45 / 50
Which of the following is an open loop control system ?
46 / 50
In a PLC, the scan time refers to the amount of time in which …..
47 / 50
PLC, s are………………………………….designed for use in the control of a wide varity of manufacturing machine and system.
48 / 50
In an open loop control system
49 / 50
A good control system has all the following features except
50 / 50
fg
decreases by the same amount as the gain increaseincrease by the sane amount as the gain decrease
The transient response, with feedback system,
