Worksheetsjeevan
Total questions: 106
Worksheet time: 2hrs 45mins
Name
Class
Date
1.
PLC has replaced__________
a)
Transistor
b)
Computer
c)
Relay Logic
d)
Solenoid
2.
Disadvantage of PLC is _________
a)
Security
b)
Documentation
c)
Fixed program application
d)
Pilot running
3.
Pulse Repetitive Timer means__________.
a)
timer which gives one pulse for each scan time
b)
timer which doesn’t have any preset value
c)
ON delay timer
d)
OFF delay timer
4.
A counter that starts from preset value and increments downward to zero is called _______ counter.
a)
Down
b)
UP
c)
UP/DOWN
d)
Non retentive counter
5.
Almost all PLC counters count the_______ of the rungs input logic
a)
Preset count
b)
pulse
c)
DC
d)
AC
6.
As an output, the counter instruction counts each time the_____ changes from a false to a true rung.
a)
count I/P
b)
Reset I/P
c)
Enable I/P
d)
count O/P
7.
A counters input signal can be from an external device, such as a limit switch or sensor, or even from______
a)
Timer
b)
RTD
c)
LVDT
d)
Stepper motor
8.
Each time the counter instruction sees a ________, a up counters accumulated value is incremented by one.
a)
True to False Transition
b)
False to True Transition
c)
continuous
d)
False Transition
9.
when working with counters one important consideration is the ________ or _________, at which an input device is sending the false-to-true signals to the processor.
a)
up, down
b)
voltage, current
c)
speed, frequency
d)
Done,over flow
10.
The numerical range within which a counter can count is ____________.
a)
32767
b)
32768
c)
32676
d)
32678
11.
A _______instruction will Reset the counter to zero.
a)
Enable
b)
Marker relay
c)
Reset
d)
Set
12.
HSC stands for _________
a)
High Sequence Counter
b)
High Standard Counter
c)
High Speed Counter
d)
Higher secondary counter
13.
Operation of High speed counters are________
a)
Independent of scan time
b)
Dependent on scan time.
c)
User dependent
d)
program dependent
14.
Which of the following is not usually associated with a PLC COUNTER
a)
Address
b)
Preset value
c)
Time base
d)
Accumulated value
15.
The PLC counter instruction is similar to the ________
a)
Internal relay instructions
b)
Transitional contact instruction
c)
Timer instructions
d)
Relay coil and contact instructions
16.
The output of a PLC counter is energized when the___________
a)
Count input rung is true
b)
Count input rung is false
c)
Accumulated count is equal to the preset count
d)
Preset count is greater than the accumulated count
17.
Each time a down counter sees a _______, its accumulated value is decremented by one
a)
True to False Transition
b)
False to True Transition
c)
continuous
d)
False Transition
18.
In PLC subtraction function output goes high, if ________.
a)
result is negative
b)
result is positive
c)
result is zero
d)
Result Is more Positive
19.
In PLC Addition function output goes high, if ________.
a)
result is negative
b)
result is positive
c)
register value over flows
d)
Result Is more Negative
20.
In PLC division function Destination 1'st Register contains ________.
a)
Reminder
b)
Quotient
c)
Divisor
d)
Dividend
21.
SQR stands for__________.
a)
Sequencer
b)
Square root
c)
Sine
d)
sign magnitude
22.
In PLC Multiplication function output coil goes ON, ___________
a)
If multiplication is completed
b)
if Destination Register value is negative
c)
if Destination Register value is positive
d)
if Destination Register value is Zero
23.
In PLC Division function output coil goes ON, ___________
a)
if Division is completed
b)
if Destination Register value is negative
c)
if Destination Register value is positive
d)
if Destination Register value is Zero
24.
The________ instruction is an input instruction used to test when two values are equal.
a)
NEQ
b)
MEQ
c)
LES
d)
EQU
25.
The__________ instruction is used to test two values for inequality
a)
NEQ
b)
MEQ
c)
LES
d)
EQU
26.
The _______ instruction is used when you want to test if one value is less than another value.
a)
NEQ
b)
MEQ
c)
LES
d)
EQU
27.
MEQ stands for ________
a)
Mask equal
b)
Mask enable equal
c)
Mask compare equal
d)
Mask Equal quantity
28.
CMP instruction is used to _______.
a)
compare value of source A and source B
b)
compare expression
c)
compute value of source A and source B
d)
Compute Expression
29.
LIM instruction is used to _________.
a)
to limit value
b)
to perform two comparisons
c)
to perform less than or equal to
d)
to perform greater than or equal to
30.
The greater than or equal instructions programming abbreviation is __________
a)
GEQ
b)
GET
c)
GTQ
d)
GTE
31.
Suppose the greater than or equal instruction has the integer 19 stored in source A and the integer 23 stored in source B then the output coil ______.
a)
turns On
b)
turns Off
c)
remains in previous state
d)
Toggle output
32.
The Mask 00FF will allow which bits to pass.
a)
Upper nibble
b)
Lower byte of word
c)
Lower nibble
d)
Upper byte of word
33.
Instruction used to convert BCD value to Binary is ________
a)
BN/BCD
b)
DN/BCD
c)
BCD/BN
d)
BCD/DN
34.
In BN/BCD, if source Register contains the Value of 1010, then Destination Register value will be___.
a)
111 000
b)
001 001
c)
001 000
d)
000 001
35.
Instruction used to convert Binary value to BCD is__________.
a)
BN/BCD
b)
DN/BCD
c)
BCD/BN
d)
BCD/DN
36.
Decimal value 56 will be converted as _________in Binary.
a)
100100
b)
100001
c)
111001
d)
111000
37.
Binary value 1011 will be converted as _________in Decimal.
a)
10
b)
11
c)
12
d)
9
38.
When SKIP function is enabled, outputs under the SKIP instruction remain in _________.
a)
OFF state
b)
ON State
c)
Previous state
d)
Toggle State
39.
When MCR function is enabled, outputs under the MCR instruction remain in _________.
a)
OFF state
b)
ON State
c)
Previous state
d)
Toggle State
40.
A ________ is a group of instructions written separately from main program to perform a function that is repeatedly called in main program.
a)
instruction set
b)
Program
c)
Subroutine
d)
set of loops
41.
JSR stands for _______.
a)
Jump Shift Right
b)
Jump Sub Program Return
c)
Jump to Sub Routine
d)
Jump shift Rotate
42.
GET/PUT instruction is another name of________.
a)
Table to Table Move function
b)
Table to Register
c)
Register to Table
d)
Register to Register
43.
In some PLC system Table to Table move function is called______.
a)
GET/PUT
b)
BLOCK TRANSFER
c)
BLOCK MOVE
d)
Table to Register
44.
In Table to Table Move function, output coil goes ON when_______is complete.
a)
Transfer of content of one Register to another
b)
Transfer of content of multiple Register to one Register
c)
Transfer of content of multiple Register to multiple Register
d)
Transfer of content of Register to Register
45.
FAL stands for_____________.
a)
Fast Access Logic
b)
First And Last
c)
File Access Last
d)
File Arithmetic and Logic
46.
The SWEEP function is used to_________.
a)
Scan the program at fixed intervals
b)
Reduce scan time
c)
Increase scan time
d)
Independent of scan time
47.
A one-shot instruction being energized on the leading edge of an input pulse means____________
a)
The one-shot instruction is energized when the PLC processor is cycled from OFF to ON
b)
The one-shot instruction is energized when the PLC processor is switched from program to run mode
c)
The one-shot instruction is energized when it registers the output changing from false to true.
d)
The one-shot instruction is energized when it registers previous input logic on its rung changing from logically false to logically true.
48.
ONE SHOT function turns On for____________.
a)
Every scan time
b)
One time, when PLC is turned On
c)
Every 10Sec
d)
Every 100 msec
49.
CLR function used to____________.
a)
Reset the content of all Registers
b)
Reset CPU
c)
Reset content of OG
d)
Reset content of IG
50.
FAL function is similar to _________function
a)
FIFO
b)
CMP
c)
CPT
d)
LIFO
51.
When BS function is enabled, then ____________.
a)
Disables the bit of Register
b)
corresponding bit of Register is set HIGH
c)
follows the BS condition
d)
corresponding bit of Register is set LOW
52.
When BC function is enabled, then ____________.
a)
Disables corresponding bit Register
b)
enables bit of Register as high
c)
follows the BC condition
d)
corresponding bit of Register is set HIGH
53.
Shift right function has got three inputs _________, __________ and __________.
a)
Step, Enable, Reset
b)
Shift, Data in, Enable
c)
Step, Data in, Enable
d)
Shift, Reset, Data in
54.
MSR stands for _________ Function.
a)
Multiple Shift Reset
b)
Multiple Shift Right
c)
Multiple Shift Register
d)
Multiple Shift Rotate
55.
The Sequencer function often called __________.
a)
Sequence register Programmer
b)
Sequence Programmer
c)
Drum controller
d)
Roller
56.
In a PLC sequencer function output goes ON, when__________
a)
enable bit high
b)
step input is made high
c)
reset input is made high
d)
last step is executed
57.
The Step circuit input in a sequencer function does______
a)
Each ON pulse steps the function to the next HR pattern
b)
Each ON pulse Resets back to the first HR
c)
When ON the function may be stepped to OFF
d)
No Change
58.
Expand SQO ________
a)
Sequencer ON
b)
Sequencer OFF
c)
Sequencer output
d)
Sequencer Reset
59.
Difference between Table to Register Move and Sequencer function is_____
a)
Destination Register cannot be a Holding Reg.
b)
Destination Register can be a Holding Reg.
c)
Destination Register must be a Output Group Reg.
d)
Destination Register can be anything.
60.
Robot can be defined as _____________
a)
Electronic device
b)
Programmed manipulator
c)
Reprogrammable manipulator
d)
Clone
61.
DR function has got ________, _________and ________ inputs.
a)
Step, Enable, Reset
b)
Shift, Data in, Enable
c)
Step, Data in, Enable
d)
Shift, Reset, Data in
62.
Number of operating input switches for EX-OR gate are
a)
1
b)
2
c)
3
d)
4
63.
Number of contact per matrix is limited to
a)
3*3
b)
4*4
c)
3*4
d)
4*5
64.
The output of a NOT gate is
a)
Same as the input
b)
inverse of the input
c)
Does not change with input
d)
None of the above
65.
___________ is an example for output device.
a)
Humidity Sensor
b)
Solenoid valve
c)
Switch
d)
LVDT
66.
The number of holding registers typically ranges between
a)
10-100
b)
8 to 12
c)
10-1000
d)
100-1000
67.
A Multi- Input Timer is otherwise known as ______________
a)
Rententive Timer
b)
Pulse Timer
c)
Non-Retentive Timer
d)
Preset Timer
68.
______timer turns off the output after the preset time
a)
ON delay timer
b)
OFF delay Timer
c)
Reset
d)
None of the above
69.
Single input timer is called __________.
a)
Non retentive
b)
Retentive
c)
Pulse timer
d)
Pulse repetitive Timer
70.
As an output, the counter instruction counts each time the_____ changes from a false to a true rung.
a)
count I/P
b)
Reset I/P
c)
Enable I/P
d)
count O/P
71.
A counters input signal can be from an external device like______
a)
Limit Switch/Sensor
b)
RTD
c)
LVDT
d)
Stepper motor
72.
Status of input devices are stored in ________ Register.
a)
Output single
b)
Input single
c)
Output group
d)
Input group
73.
Which of these does not belong to arithmetic functions?
a)
Addition
b)
Square root
c)
Equal to fuction
d)
Division
74.
The greater than programming abbreviation is __________
a)
GEQ
b)
GET
c)
GTQ
d)
GRT
75.
In PLC the User Ladder program is stored in ________ memory.
a)
ROM
b)
PROM
c)
EPROM
d)
RAM
76.
The devices connected to PLC for sending status information are called _______field devices.
a)
Programmer and monitoring
b)
Memory
c)
INPUT
d)
Output
77.
The Time taken to complete one scan cycle is called __________.
a)
Scan Time
b)
Cyclic Time
c)
Fetch Time
d)
Updating the output
78.
_________ represents any output,If any left to right path of input condition is true than the referenced coil is de-energized (turned off ).
a)
Output Coil
b)
Not Output Coil
c)
NO
d)
NC
79.
Digital I/O modules operate on___________
a)
24V AC supply
b)
24V DC supply
c)
5V AC supply
d)
12V DC supply
80.
The scan consists of a series of sequential operations which include, Reading________, program execution, Updating output
a)
connection
b)
Input
c)
Output
d)
Tie point
81.
The other name of falling edge actuation is
a)
Differentiation down
b)
Leading Edge
c)
differentiation up
d)
Both a & b
82.
For single input timer, when the input is re-energised
a)
the timer resets to zero
b)
No change
c)
the timer stops running where it is but does not reset to zero
d)
the timer does not reset to zero
83.
One group register can control______outputs
a)
8
b)
16
c)
1
d)
2
84.
Each time the counter instruction sees a ________, a up counters accumulated value is incremented by one.
a)
True to False Transition
b)
False to True Transition
c)
continuous
d)
False Transition
85.
In PLC subtraction function output goes high, if ________.
a)
result is negative
b)
result is positive
c)
result is zero
d)
Result Is more Positive
86.
MEQ stands for _______
a)
Mask equal
b)
Mask enable equal
c)
Mask compare equal
d)
Mask Equal quantity
87.
PLC CPU consists of
a)
Power supply
b)
Memory
c)
Processor
d)
All of the above
88.
Application of Ex-OR Gate is _____________
a)
Stair Case Wiring
b)
mutual Interlock
c)
direct reversal
d)
None of the above
89.
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)
Opto coupler
d)
Holding Register
90.
OR stands for
a)
Operating Register
b)
Operation Register
c)
Output Register
d)
None of the above
91.
Multiple input timer includes
a)
Enable
b)
Run
c)
Reset
d)
All of the above
92.
In PLC division function Destination 1'st Register contains ________.
a)
Reminder
b)
Quotient
c)
Divisor
d)
Dividend
93.
SQR stands for__________.
a)
Sequencer
b)
Square root
c)
Sine
d)
sign magnitude
94.
The LIM fuction has _____number of inputs
a)
2
b)
3
c)
4
d)
1
95.
Squaring is done by ______ function
a)
Square root
b)
Addition
c)
Division
d)
Multiplication
96.
______________ Function is used to eliminate the effect of spikes from input key bounce.
a)
ONS
b)
FAL
c)
FIFO
d)
CPT
97.
JSR stands for _______.
a)
Jump Shift Right
b)
Jump Sub Program Return
c)
Jump to Sub Routine
d)
Jump shift Rotate
98.
IN sweep Function,The fixed intervals need to be longer than the ___________ to be operational.
a)
Scan Time
b)
ON Delay Time
c)
Off delay Time
d)
None of the above
99.
Jump with return instruction leaps to _______ when activated.
a)
Subroutine
b)
main program
c)
other program
d)
other loop
100.
When BS function is enabled, then ____________.
a)
Disables the bit of Register
b)
corresponding bit of Register is set HIGH(1)
c)
corresponding bit of Register is set low(0)
d)
Disables the bits of register
101.
When MCR function is on, outputs under the MCR instruction Functions in _________.
a)
Normal condition
b)
ON State
c)
Previous state
d)
Toggle State
102.
When SKIP function is enabled, outputs under the SKIP instruction remain in _________.
a)
OFF state
b)
ON State
c)
Previous state
d)
Toggle State
103.
A ________ is a group of instructions written separately from main program to perform a function that is repeatedly called in main program.
a)
instruction set
b)
Program
c)
Subroutine
d)
set of loops
104.
In BLOCK transfer the output coil comes on
a)
When the transfer function is enabled
b)
when the transfer is taking place
c)
when the transfer of all registers is complete
d)
When the transfer is initiated
105.
The keyword for bit follow function is _____.
a)
BS
b)
BF
c)
BC
d)
None of the above
106.
In a PLC sequencer function has __________, _______, ______, inputs.
a)
Step, Enable, Reset
b)
Shift, Data in, Enable
c)
Step, Data in, Enable
d)
Shift, Reset, Data in
100 %
