ALL THE BEST!!!
PLC-EFC CHENNAI -19th DECEMBER 2024
1 / 50
Regenerative feedback implies feedback with
2 / 50
Peripherals are used in PLC to
3 / 50
Which of the following statements about a single pole double throw relay is true ?
4 / 50
In closed loop control system, with positive value of feedback gain the overall gain of the system will
5 / 50
The PLC was invented by.
6 / 50
A good application for a timed interrupt in a PLC program would be:
7 / 50
When the accumulator value equals the register value, the relay contact is
8 / 50
In an automatic control system which of the following elements is not used ?
9 / 50
Which of the following is an open loop control system ?
10 / 50
Which of the following is the output of a thermocouple ?
11 / 50
Zero initial condition for a system means
12 / 50
13 / 50
The ………………………………….. is moved toward the relay electromagnet when the relay is on.
14 / 50
The difference between online and offline PLC programming is . . .
15 / 50
16 / 50
In PLC, a digital counter consists of
17 / 50
AC servomotor resembles
18 / 50
When ___________ contacts are actuated, they disrupt the power supply through them.
19 / 50
Current flows into the …………………………………
20 / 50
In a Current sinking DC input module………………………………
21 / 50
The acronym PLC stands for:
22 / 50
Ladder logic programming consists primarily of:
23 / 50
Control system with excessive noise, is likely to suffer from
24 / 50
To increase the number of inputs and outputs of the PLC, one can use expansion modules.
25 / 50
An OR function implemented in ladder logic uses:
26 / 50
How is the speed of operation of the conventional relay system compared to digital controllers?
27 / 50
A switch whose operation is activated by an electromagnet is called
28 / 50
When a relay is NOT energized:
29 / 50
Which is the type and styles of switches?
30 / 50
Which of the following statements about RLL is NOT true ?
31 / 50
Due to which of the following reasons excessive band width in control systems should be avoided ?
32 / 50
Which one of the following increases the steady state accuracy.
33 / 50
A good control system has all the following features except
34 / 50
35 / 50
AC output field devices can interface to
36 / 50
37 / 50
Current flows into the………………………………..
38 / 50
39 / 50
Which of the following RLL applications is not normally perfomed in early automation systems ?
40 / 50
One of the following has tendency to oscillate
41 / 50
The output of a feedback control system must be a function of
42 / 50
As a result of introduction of negative feedback which of the following will not decrease ?
43 / 50
In open loop system
44 / 50
In a Current sinking DC input module……………………………..
45 / 50
Eddy current drive can be a retrofit for ____________
46 / 50
47 / 50
48 / 50
fg• decreases by the same amount as the gain increase• increase by the same amount as the gain decreaseThe transient response, with feedback system,
49 / 50
Memory size in a PLC is measured in either bits, bytes or words.
50 / 50
In a PLC, the scan time refers to the amount of time in which …..
