WorksheetsPLC/HMI/SCADA
Total questions: 77
Worksheet time: 39mins
Name
Class
Date
1.
PLC Stands for
a)
Programmable Logic
Controller
b)
Programmable
Logic Circuit
c)
Programmable Logic
Computer
d)
Programmable Level
Controller
2.
PLC parts are mounted on
a)
RACK & CHASIS
b)
Isolation Stages
c)
Program Monitor
d)
OPTO isolators
3.
The abbreviations NO and NC represents the electrical state of switch contacts when .
a)
Power is applied
b)
Power is not
applied
c)
The switch is actuated
d)
The switch is not
actuated
4.
NC push button connected in hardware & NC contact in software then the coil connected to the NC contact
will be .
a)
ON
b)
OFF
c)
Short
d)
Toggle
5.
A limit switch is usually actuated by .
a)
Hand
b)
Pressure
c)
Contact with an object
d)
An electromagnet
6.
A thermocouple ,when heated .
a)
Produces a small dc
voltage
b)
Increases its
resistance value
c)
Produces a small AC
voltage
d)
Decreases its resistance
value
7.
PLC uses
a)
Assembly
b)
Command
c)
Manufacturing
d)
None of the above
8.
is used to communicate with PLC .
a)
Analog Module
b)
Input Module
c)
Program Monitor
d)
Debugger
9.
PLC has replaced.
a)
electronic circuit
b)
relay logic
c)
computer
d)
none
10.
Disadvantage of PLC is .
a)
security
b)
too many
contacts
c)
pilot running
d)
fixed program
application
11.
In PLC the user program is stored in .
a)
ROM
b)
RAM
c)
EPROM
d)
EEPROM
12.
Input modules provide an interface between.
a)
Input modules and the
CPU
b)
Inputs and the
CPU
c)
Output modules and field
devices
d)
The CPU and output
modules
13.
The programming device must be connected to the controller.
a)
At all times
b)
When entering a
programme
c)
When monitoring a
programme
d)
both b&c
14.
Electrical isolation is provided so that there is no physical electrical connection between the CPU and output
field devices. This isolation is usually accomplished by.
a)
power supply
b)
rectifier
c)
output module
d)
holding register
15.
Digital I/O modules operate on.
a)
24V AC supply
b)
24V DC supply
c)
5V AC supply
d)
12V AC supply
16.
EXAMPLE OF I/P MODULE
a)
PUSH BUTTON
b)
RELAY COIL
c)
MOTOR
d)
BOTH A & B
17.
EXAMPLES OF OUTPUT MODULE.
a)
PILOT LIGHT
b)
LED
c)
LCD
d)
NONE
18.
The logical OR function is similar to.
a)
In parallel
b)
In series
c)
inverted logic
d)
both (A) &(c)
19.
If two NC contacts are connected in series that satisfies Gate logic.
a)
AND
b)
NAND
c)
OR
d)
NOR
20.
contact can be used to satisfy NOT gate condition.
a)
NC
b)
NO
c)
BOTH NO AND NC
d)
NONE OF THE ABOVE
21.
If two NO contacts are connected in series that satisfies Gate logic.
a)
AND
b)
NAND
c)
OR
d)
NOR
22.
If two NC contacts are connected in parallel that satisfies Gate logic.
a)
AND
b)
NAND
c)
OR
d)
NOR
23.
CPU CONISISTS OF .
a)
MICROPROCESSOR
b)
MEMORY
c)
POWER SUPPLY
d)
ALL THE ABOVE
24.
AND GATE,INPUTS ARE HIGH, OUTPUT IS.
a)
LOW
b)
HIGH
c)
NONE OF THE ABOVE
d)
ALL
25.
OR GATE,IF ANY OF THE INPUTS ARE HIGH,OUPUT IS.
a)
LOW
b)
HIGH
c)
BOTH
d)
NONE
26.
How many registers PLC does have?
a)
3
b)
2
c)
1
d)
NONE OF THE ABOVE
27.
Types of TIMER are
a)
TON Timer
b)
TOFF Timer
c)
BOTH
d)
NONE
28.
A timer that initiates an action at a specified time after enable input is made high.
a)
ON delay timer
b)
OFF delay timer
c)
Retentive timer
d)
none of the above
29.
A timer that initiates an action at a specified time after enable input is made low.
a)
on delay timer
b)
off delay timer
c)
retentive timer
d)
none of the above
30.
A single input timer is called
a)
retentive timer
b)
non retentive
timer
c)
none of the above
d)
all of the above
31.
HSC stands for.
a)
High Sequence Counter
b)
High standard
Counter
c)
High Speed Counter
d)
none
32.
Types of counter are
a)
UP Counter
b)
DOWN Counter
c)
UO-DOWN Counter
d)
all of the above
33.
A counters input signal can come from an external device, such as a limit switch or sensor, or from.
a)
timer
b)
RTD
c)
LVDT
d)
stepper motor
34.
proximity switch can be actuated.
a)
Without any physical
contact
b)
By a change in
flight intensity
c)
By a change in capacitance
d)
By all of the above
35.
is a device or software that is used to communicate with the machines or groups of machines in
the plant or production area.
a)
HMI
b)
scada
c)
MMI
d)
None of the above
36.
LOI stands for
a)
line of action
b)
letter of intent
c)
Local Operator Interface
d)
lack of information
37.
HMI directly connect the human with the
a)
computer
b)
MMI
c)
machine
d)
object
38.
OIT stands for
a)
Office of information
technology
b)
Operator
Interface
c)
outsourced information
technology
d)
None of the above
39.
the has all the necessary tools to control the process.
a)
operator
b)
receiver
c)
transmitter
d)
all of the above
40.
HMIs capture data from a system such as
a)
Data Handling
b)
Alarm handling
c)
both
d)
none
41.
The includes functions like data trending, alarm handling, data logging and recipes.
a)
data handler
b)
trend
c)
Alarm handler
d)
IOT
42.
Trends in SCADA / HMI is very useful to to diagnose useful process parameters from the past
saved trend data.
a)
track
b)
monitor
c)
calculate
d)
all of the above
43.
a record of all the process data in the form of a graph is called as
a)
trend
b)
track
c)
scada
d)
HMI
44.
are the graphs that display the values of data in real-time and the graph updates for every
instant of time we have specified.
a)
Real-time Trends
b)
Historical Trends
c)
all of the above
d)
None of the above
45.
are used to display the data in real-time at the same time the old data can be retrieved and
viewed on the run time.
a)
Historical Trends
b)
Real-time Trends
c)
all of the above
d)
None of the above
46.
HMI and need to be compatible.
a)
SCADA
b)
PLC
c)
track
d)
MTU
47.
Once the PLC and the HMI are then whatever is programmed into the HMI can be used to
monitor and control PLC functions.
a)
talking
b)
operating
c)
listening
d)
reading
48.
A is a set of rules for communication among networked devices.
a)
talking
b)
Data saving
c)
Both a. & b.
d)
protocol
49.
Advantages of HMI
a)
Internet of things
b)
Data saving
c)
high cost
d)
Both a. & b.
50.
In data translation, the operator would be able to see the of the system and it can be
controlled.
a)
trend
b)
graphical
representation
c)
Supervisory Control and
Data Acquisition
d)
downtime
51.
IOT can be considered as the
a)
collection of the
devices
b)
output
c)
SCADA
d)
HMI
52.
A human machine interface can operating costs by replacing hundreds of selectors,
pushbuttons, indicator lights and more
a)
increase
b)
reduce
c)
remain same
d)
NONE OF THE ABOVE
53.
SCADA stands for
a)
software disk array
b)
space
development
c)
spicetree design agency
d)
Supervisory Control and
Data Acquisition
54.
The SCADA system helps in managing the communication of system issues to mitigate
a)
downtime
b)
uptime
c)
total time
d)
network interfaces
55.
This central control system consist of communication equipment,
a)
network interfaces
b)
input/ output
devices
c)
software.
d)
all of the above
56.
SCADA is a system of hardware and elements that facilitate process control.
a)
architecture
b)
software
c)
input/ output devices
d)
network interfaces
57.
is working on collecting data and information via distributed devices like (remote terminal unit)
RTU, PLC
a)
HMI
b)
RTU
c)
SCADA
d)
MTU
58.
SCADA send control actions to the process depending on the
a)
architecture
b)
I/O control
signals
c)
MTU
d)
information.
59.
The independent PLCs and RTUs in a SCADA system perform on field devices while being supervised by a SCADA/HMI software package on a master computer.
a)
HMI
b)
I/O control signals
c)
information.
d)
Remote terminal unit
60.
RTU stands for
a)
real time unit
b)
return time unit
c)
Remote terminal unit
d)
NONE OF THE ABOVE
61.
The can monitor and control the field devices even when the operator in not present by means scheduler programed.
a)
MTU
b)
RTUs
c)
SDH/ SONET
d)
optocoupler
62.
are used to transmit the recorded data toward the supervisory system.
a)
transmitter
b)
signals
c)
trends
d)
RTUs
63.
can also be used for larger systems like railways and power stations.
a)
SDH/ SONET
b)
Program Monitor
c)
optocoupler
d)
computers
64.
convert the parameters from the physical form to electrical form as continuous (analog) or discrete (digital) signals readable by the remote station equipment (RTUs or PLCs).
a)
Field Instruments
b)
Master Terminal Unit
c)
SCADA
d)
Industries
65.
MTU stands for
a)
Maximum transmission
unit
b)
Master Terminal Unit
c)
mobile terminated unit
d)
mounted terminal
66.
In Architecture of SCADA is the Control Level which includes the control devices like PLC, PC.
a)
Level 0
b)
Level 1
c)
Level 2
d)
Level 3
67.
were used in the earlier Supervisory Control and Data Acquisition systems
a)
Minicomputers
b)
optocoupler
c)
microcontroller
d)
microprocessor
68.
The Early or Monolithic SCADA Systems is also known as
a)
third Generation
b)
second
Generation
c)
First Generation
d)
Fourth Generation
69.
processing and real-time data were shared to perform control operations.
a)
text
b)
Command
c)
trend
d)
graph
70.
Internet of Things SCADA Systems is also known as
a)
third Generation
b)
first Generation
c)
second Generation
d)
Fourth Generation
71.
Fiber optic connections or is used for data transmission between the nodes.
a)
HMI
b)
Ethernet
c)
profibus
d)
profinet
72.
full form of wan is
a)
Wide area network
b)
west australia
newspapers
c)
wide area news
d)
none of the above
73.
Used to control HVAC, central air conditioning, lighting, entry/ exit gates, etc.
a)
Oil and Gas
b)
Industries and
Buildings
c)
Water and sewage treatment
d)
Manufacturing &
Processing
74.
Used for managing inventories for controlling over manufacturing/ stocking.
a)
Water and sewage
treatment
b)
Oil and Gas
c)
Manufacturing &
Processing
d)
Industries and Buildings
75.
Used for regulating subway electricity, automating traffic signals/ railway crossing and live
tracking of flights/ trains/ buses.
a)
Public Transport
b)
Manipulator
c)
HMI
d)
SCADA
76.
used to monitor and control the distributed equipment used like filters and valves
a)
Industries and Buildings
b)
Water and
sewage
c)
Manufacturing & Processing
d)
Oil and Gas
77.
are mainly used to monitor a wide data variety like currents, voltages, temperature, pressure,water levels
a)
HMI
b)
RTU
c)
MTU
d)
SCADA
100 %
