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WorksheetsCP15 2020 - TEST 1-25.11.22
Total questions: 105
Worksheet time: 53mins
Name
Class
Date
1.
PLC works with which values?
a)
Octal
b)
Boolean
c)
Hexadecimal
d)
All of the above
2.
1 nibble =
a)
4 byte
b)
4 bits
c)
4 KB
d)
8 bits
3.
1 word =
a)
16 bytes
b)
16 KB
c)
8 bits
d)
16 bits
4.
Full form of ADC is
a)
Analog to Data Converter
b)
Analog to Digital Converter
c)
Amplitude to Digital Converter
d)
Analog to Discrete data Converter
5.
PLC works with which values?
a)
Octal
b)
Boolean
c)
Hexadecimal
d)
All of the above
6.
1 byte =
a)
16 bytes
b)
16 KB
c)
8 bits
d)
16 bits
7.
A binary number with one digit is called a ____
a)
Bit
b)
byte
c)
Word
d)
Nibble
8.
Analog signal can be converted to Digital values using
a)
Resolution
b)
Sampling
c)
Memory Allocation
d)
None of the above
9.
The A/D converter samples the amplitude of the analog signal at
a)
Discrete intervals
b)
Discrete function
c)
maximum range
d)
None of the above
10.
three types of analog signals in PLC programming___ ____ ____
a)
Voltage, Current & Resistance
b)
Voltage,Current & Transistor
c)
Resistor,Current & Transistor
d)
All
11.
the process of mapping continuous infinite values to a smaller set of discrete finite values is ______
a)
Resolution
b)
Quantization
c)
Sampling
d)
ADC
12.
The number of bits used to represent the analog input defines
a)
Resolution
b)
Range
c)
Sampling
d)
ADC
13.
PLC Value 27648 represents 10V analog signal. calculate the real resolution of our analog signal.
a)
361.7 μV
b)
367.7 μV
c)
369.7 μV
d)
360.7 μV
14.
In Siemens PLC, what is Overshoot Range?
a)
22.86 mA
b)
22.96 mA
c)
22.81 mA
d)
22.76 mA
15.
In Siemens PLC, what is Undershoot Range?
a)
1.815 mA
b)
1.885 mA
c)
1.15 mA
d)
1.185 mA
16.
In Siemens PLC, what is Overflow Range?
a)
22.86 mA
b)
22.96 mA
c)
22.81 mA
d)
22.76 mA
17.
Wiring of Analog signals is categorised into?
a)
Voltage and Resistance
b)
Voltage and Current
c)
Resistance and Current
d)
None of the above
18.
Which of the following is example for input analog sensors and transmitters.
a)
Submersible Level Transmitters
b)
Pressure Transmitter Sensor
c)
Temperature Sensor
d)
All
19.
Temperature transmitter with a 4-20 mA output. Connected to the transmitter is a temperature sensor. The transmitter is then calibrated to a range of 0-100 degrees. What this means is that when the temperature is 0 degrees the output of the transmitter will be _____
a)
4 mA
b)
12mA
c)
16mA
d)
20mA
20.
Temperature transmitter with a 4-20 mA output. Connected to the transmitter is a temperature sensor. The transmitter is then calibrated to a range of 0-100 degrees. What this means is that when the temperature is 100 degrees the output of the transmitter will be _____
a)
4 mA
b)
12mA
c)
16mA
d)
20mA
21.
What is common between both voltage and current analog signal wiring?
a)
Temperature
b)
Resistance
c)
Reactance
d)
Current
22.
Analog voltage inputs has two terminals, what are those?
a)
AGND and AIP
b)
AIN and AG
c)
AIN and AGND
d)
None of the above
23.
All electrical wires (conductors) have resistance and hence creating a ____ drop.when you haveas long as distances of wiring.
a)
Current
b)
Resistance
c)
Voltage
d)
All
24.
PLC analog module terminal AIN is connected to______terminal of voltage source.
a)
Positive(+)
b)
Negative(-)
c)
Ground
d)
signal
25.
PLC analog module terminal AGND is connected to______terminal of voltage source.
a)
Positive(+)
b)
Negative(-)
c)
Ground
d)
signal
26.
Which terminal is used as reference for our analog signal?
a)
AIN
b)
AGND
c)
AI
d)
GND
27.
How can we reduce the effect of Electromagnetic Interference?
a)
Sampling
b)
Shielding
c)
EMC
d)
Resistance
28.
The current in analog signals is usually measured in _____unit
a)
Resistance
b)
Voltage
c)
Amperes (A).
d)
milliamperes (mA).
29.
A resistor is put between positive (AI) and negative (AGND). This will converts our current signal to a voltage signal.This resistor called as___
a)
Capacitor
b)
Closed loop
c)
Voltage drop
d)
Shunt Resistor
30.
What is the resistance of shunt resistor in Siemens analog input module.
a)
300 Ohm
b)
250 Ohm
c)
350 Ohm
d)
250 Kohm
31.
Which analog input Wiring methosh is separates the supply from the signal
a)
2-wire Analog Input
b)
3-wire Analog Input
c)
4-wire Analog Input
d)
All
32.
convert the raw value from the analog input to some sort of engineering value Is
a)
unscaling
b)
scaling
c)
both a and b
d)
none of these
33.
Example for engineering value is
a)
ampere
b)
volt
c)
resistence
d)
kg
34.
The block used for scaling in PLC is
a)
FC 107
b)
FC 106
c)
FC 105
d)
BC 105
35.
FC 105 has -------- inputs
a)
3
b)
2
c)
5
d)
4
36.
The range of Raw value in siemens plc is
a)
0-37650
b)
0-27648
c)
0-27248
d)
0-1024
37.
Example for Analog outputs for PLC are
a)
motor
b)
sensor
c)
valve
d)
both a and c
38.
PLC Analog outputs need ------------ Signal
a)
descrete signal
b)
pulse signal
c)
continous
d)
none of these
39.
Wiring of Voltage and Cureent IS same in PLC
a)
True
b)
FALSE
c)
both a and b
d)
cant say
40.
Wiring of Voltage and Cureent is depends on
a)
input
b)
sensor
c)
plc
d)
load
41.
Volatage Output consist of how many terminal
a)
2
b)
3
c)
4
d)
1
42.
opposition that a circuit presents to changes in current or voltage
a)
flux
b)
density
c)
line impedence
d)
current
43.
opposition that a circuit presents to changes in current or voltage
a)
flux
b)
density
c)
line impedence
d)
current
44.
Two extra terminals are used in voltage analog output wiring
a)
for load
b)
for compensating
c)
for signal
d)
all of the above
45.
Minimum load impedance in Voltage wiring is
a)
500 Ohm
b)
1k ohm
c)
300 ohm
d)
500-1k ohm
46.
if we want to generate 8ma signal from plc what value should be given D to A converter
a)
7612
b)
8610
c)
6912
d)
13792
47.
The need of scaling function in PLC
a)
for processing
b)
to show the measurement on an HMI.
c)
It is convenient to work with the engineering value
d)
both a and c
48.
The need of unscaling function in PLC
a)
module can convert to an output
b)
for processing
c)
to show the measurement on an HMI.
d)
none of these
49.
Two extra terminals are used in voltage analog output wiring
a)
for load
b)
for compensating
c)
for signal
d)
all of the above
50.
Minimum load impedance in Voltage wiring is
a)
500 Ohm
b)
1k ohm
c)
300 ohm
d)
500-1k ohm
51.
Current Output consist of how many terminal
a)
2
b)
3
c)
4
d)
1
52.
LD Stands for_____________
a)
Ladder Diagram
b)
Logic Diagram
c)
Ladder Circuit
d)
Ladder Programming
53.
FBD stands for _____________.
a)
Functional Bit Details
b)
Function Block Diagram
c)
Feed Back Diagram
d)
Function Block Details
54.
SFC stands for _____________.
a)
Sequential Function Circuit
b)
Series Function Chart
c)
Series Function Circuit
d)
Sequential Function Chart
55.
ST stands for _____________.
a)
Sequential Text
b)
Structured Transister
c)
Structured Text
d)
Sequential Transister
56.
IL stands for _____________.
a)
Instruction List
b)
Insstruction Ladder diagram
c)
Information List
d)
Input List
57.
In Ladder diagram, the horizontal lines called ___________
a)
Ladder Diagram
b)
Rungs
c)
Power Rail
d)
Ladder Circuit
58.
The combination of series and parallel branches in the same or different rungs are called as_______ Branch.
a)
Inputs
b)
Outputs
c)
Nest
d)
Power Rail
59.
The instruction list plc programming language uses ________ code.
a)
c language code
b)
python
c)
Mnemonic code
d)
none of the above
60.
Which are the programming method?
a)
Ladder diagram
b)
Functional block diagram
c)
Sequential function chart
d)
All of the above
61.
if one input is true, the output will also become true
a)
OR GATE
b)
AND GATE
c)
NOT GATE
d)
XOR GATE
62.
If both the inputs are true, then the output is also true
a)
AND gate
b)
NOT GATE
c)
NAND
d)
XOR GATE
63.
Which is the following is not a PLC programming language?
a)
laddar diagram
b)
Instruction list
c)
c language
d)
FBD
64.
Advantages of ST PLC programming language
a)
Easier to understand
b)
High Flexibility
c)
Transferability
d)
All of the above
65.
Which is the FBD blocks work by assigning its input to a place in the PLC memory
a)
Assignment
b)
Exclusive OR Operation
c)
Negation Operation
d)
All the above
66.
Which FBD block you have to use to invert either the input or output of a block.
a)
Assignment
b)
Exclusive OR Operation
c)
Negation Operation
d)
All the above
67.
it is used to generate a pulse of a specific length.
a)
Pulse timer
b)
On delay timer
c)
Off delay timer
d)
All the above
68.
In Pulse timer ET stands for
a)
Preset Time
b)
Input
c)
Elapsed Time
d)
Out put
69.
The following are the catagories edge detection function blocks.
a)
R_TRIG Function Block.
b)
F_TRIG Function Block
c)
Pulse timer
d)
Both A & B
70.
The following are the catagories of bistable function blocks.
a)
Set/ Reset.
b)
Reset/ Set.
c)
NOT GATE
d)
Both A & B
71.
A set of rules that sends and receives data between two or more communicating devices is called ________
a)
communication protocol
b)
Network
c)
Transmitter
d)
Receiver
72.
PPI Stands for_____________
a)
Parallel port interface
b)
prallel point interface
c)
Point to Point Interface
d)
Parallel to parallel interface
73.
MPI Stands for_____________
a)
Multi Port Interface
b)
Multi Point Interface
c)
Multi point Internet
d)
Multi post Internet
74.
PPI adaptor used in ______PLC Module
a)
S7 200
b)
S7 300
c)
S7 400
d)
S7 1200
75.
MPI adaptor used in ______PLC Module
a)
S7 200
b)
S7 300
c)
Both S7 200 & S7 300
d)
All Modules
76.
Baud rate is also known as
a)
protocols
b)
modules
c)
Communication speed
d)
NONE
77.
Baud rate for Ethernet communication protocol
a)
100Mb/s
b)
12Mb/s
c)
5Mb/s
d)
500Kb/s
78.
Network Length for Profibus communication protocol
a)
15Km
b)
50m
c)
100m
d)
30Km
79.
Number of Nodes for Device Net Communication protocol
a)
8
b)
16
c)
32
d)
64
80.
Network Length for Control Net Communication protocol
a)
15Km
b)
50m
c)
100m
d)
30Km
81.
protocol uses a Master/Slave technique to communicate between devices.
a)
Ethernet/IP and Ethernet TCP/IP
b)
Modbus RTU
c)
Modbus TCP/IP
d)
Profibus and Profinet
82.
Types of PLC Communication Protocols
a)
EtherNet/IP
b)
DirectNet
c)
ControlNet
d)
ALL
83.
IP Stands for_____________
a)
Internet point
b)
Internet Protocol
c)
Interface point
d)
Input
84.
TCP Stands for_____________
a)
Transmission Control Point
b)
Transister Control Protocol
c)
Transmission Control Protocol
d)
Transmission Circuit Protocol
85.
IEA Stands for_____________
a)
Industrial Electronics Association
b)
Industrial Ethernet Association
c)
Internet Ethernet Association
d)
Internet Electronics Association
86.
The communication protocols are dependent upon three fundamental parts ____ ____ ___
a)
baud rate, network length, and the number of nodes.
b)
speed , protocol and nodes
c)
Characteristics, Speed and nodes
d)
Node , Junctions and Speed
87.
Profibus Stands for_____________
a)
PROcess-FIeld-BUS
b)
Protocol
c)
Internet Bus
d)
Internet Protocol
88.
When Porfibus network operate at speed of 12 megabits per second. What is the cable length used in network.
a)
1000 meters
b)
50 meters
c)
100 meters
d)
500 meters
89.
When Porfibus network speed increases What happends to cable Length
a)
Increase
b)
Decrease
c)
No change
d)
All
90.
The physical interface used for Profinet is a standard ____ Ethernet jack
a)
RJ-46
b)
RJ-48
c)
RJ-45
d)
RJ-47
91.
Common reasons why PLC control systems fail
a)
module failure
b)
power outages
c)
bad network connections
d)
ALL
92.
the engineer usually determines where the sequence has stopped by interrogating the software to ____Mode
a)
On-line
b)
Off line
c)
execution
d)
All
93.
Possible root cause for I/O module and input/output point problems.
a)
Configuration error
b)
Tripped circuit breaker
c)
Loose terminal block
d)
All
94.
Most of the cases the PLC fails due to following factors
a)
Module failure of the input/output (I/O).
b)
Problems with a field device
c)
Problems with the power supply
d)
All
95.
protecting both the PLC and maintenance personnel _____ is very Important
a)
Power supply
b)
Proper Grounding
c)
network connection
d)
Loose connection
96.
EMI stands for ____
a)
Electromechanic Interference
b)
Electronic Machine interference
c)
Electric Machine interference
d)
Electromagnetic Interference
97.
RFI stands for ____
a)
Resistor Frequency interface
b)
Radio filter interference
c)
Radio frequency interference
d)
Radio frequency Internet
98.
Source of Electromagnetic Interference
a)
High frequency devices
b)
Power lines
c)
Electric motors
d)
All
99.
Ligitning causes _____Electrical Noise interference
a)
Electromagnetic interference
b)
short circuit
c)
Tripped circuit breaker
d)
All
100.
The memory of a PLC can become corrupted due to
a)
frequency interference
b)
disruptions of power
c)
sudden loss of power
d)
All
101.
To avoid the possibility of power failure, the majority of today’s industrial facilities have ________________
a)
Preventing power failures
b)
Backup power sources.
c)
Regular check up
d)
Monitoring power system
102.
Identify the redundant power source for Back Up.
a)
UPS
b)
Current source
c)
DC Power Source
d)
AC Power Source
103.
Power failures can cause damage such as __________&__________.
a)
Short circuit And overheating
b)
hanging & Shut down
c)
System damage & Data loss
d)
Electronic circuit &damage
104.
On some PLCs, _________ are installed for prolonged power when a blackout hits.
a)
Current source
b)
DC Power Source
c)
AC Power Source
d)
Batteries
105.
To safeguard systems from communication network loss, engineers must ______ the connections between different system parts.
a)
randomly inspect
b)
not at all inspect
c)
rarely inspect
d)
regularly inspect
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