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