ALL THE BEST!!!
PLC-LBI JODHPUR- DEC BATCH -19th FEB 2025
1 / 50
The ………………………………….. is moved toward the relay electromagnet when the relay is on.
2 / 50
The temperature, under thermal and electrical system analogy, is considered analogous to
3 / 50
What is the use of FOR/NEXT loop in PLC?
4 / 50
Electronic soft starters are used for motors to:
5 / 50
The main difference between online and offline PLC programming is
6 / 50
Which of the following is an open loop control system ?
7 / 50
In an automatic control system which of the following elements is not used ?
8 / 50
A switch whose operation is activated by an electromagnet is called
9 / 50
In closed loop control system, with positive value of feedback gain the overall gain of the system will
10 / 50
In an open loop control system
11 / 50
When a relay is NOT energized:
12 / 50
One of the following has tendency to oscillate
13 / 50
A control system working under unknown random actions is called
14 / 50
Which of the following statements about RLL is NOT true ?
15 / 50
In PLC, a digital counter consists of
16 / 50
The first company to build PLCs was .
17 / 50
PLC, s are………………………………….designed for use in the control of a wide varity of manufacturing machine and system.
18 / 50
The capacitance , in force-current analogy, is analogous to
19 / 50
For open control system which of the following stataments is incorrect ?
20 / 50
When a synchronous motor is running at synchronous speed. The damper winding produces
21 / 50
A closed loop system is distinguished from open loop system by which of the following ?
22 / 50
23 / 50
Any externally introduced signal affecting the controlled output is called a
24 / 50
The PLC was invented by.
25 / 50
A salient pole synchronous motor is running at no load .its field current is switched off.The motor will
26 / 50
The part that monitors the inputs and makes decisions in a PLC is the CPU.
27 / 50
28 / 50
A Control system in which the control action is somehow dependent on the output is known as
29 / 50
One of the following is an input device
30 / 50
Which of the following statements is not correct?
31 / 50
Which is the type and styles of switches?
32 / 50
An OR function implemented in ladder logic uses
33 / 50
Which are field devices?
34 / 50
Which one of the following is not a PLC manufacturer
35 / 50
Which brand provides RS Logix software?
36 / 50
For open control system which of the following statements is incorrect ?
37 / 50
After a fault condition in PLC, the system should enter which mode?
38 / 50
The d.c. series motor should always be started with load because
39 / 50
In a control system the output of the controller is given to
40 / 50
41 / 50
42 / 50
Which of the following statements about a single pole double throw relay NOT true ?
43 / 50
HMI Means ____________Machine Interface.The battery polarity
44 / 50
AC output field devices can interface to
45 / 50
A good control system has all the following features except
46 / 50
The basic functions of electronic ballast excludes one of the following
47 / 50
Which of the following statements about a single pole double throw relay is true ?
48 / 50
49 / 50
Parallel connections of a ladder logic program are typically called
50 / 50
In open loop system
