INTERGRATION EXAM QUESTIONS AND CORRECT
ANSWERS (VERIFIED ANSWERS) Q&A 2026
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1.
What is the primary function of a PLC in automation systems?
A. Data storage only
B. Mechanical motion generation
C. Industrial process control
D. Power generation
Rationale: A PLC is designed to control machines and processes
based on programmed logic.
Correct Answer: C. Industrial process control
2.
Which device is commonly used as an input sensor in PLC
systems?
A. Motor
B. Relay
C. Proximity sensor
D. Solenoid valve
,Rationale: Sensors provide input signals to the PLC.
Correct Answer: C. Proximity sensor
3.
Which programming language is most commonly used in PLC
ladder logic?
A. Python
B. Ladder Diagram (LD)
C. C++
D. Java
Rationale: Ladder logic is the standard PLC programming
language.
Correct Answer: B. Ladder Diagram (LD)
4.
What does a PLC scan cycle include?
A. Output only
B. Input scan, program execution, output update
C. Mechanical motion
D. Network configuration
Rationale: PLC continuously reads inputs, executes logic, and
updates outputs.
Correct Answer: B. Input scan, program execution, output
update
,5.
Which component executes the PLC program?
A. Memory card
B. CPU
C. Sensor
D. Actuator
Rationale: The CPU processes logic instructions.
Correct Answer: B. CPU
6.
What is the role of an actuator in robotics?
A. Data processing
B. Receiving input signals
C. Producing physical movement
D. Storing memory
Rationale: Actuators convert electrical signals into motion.
Correct Answer: C. Producing physical movement
7.
Which of the following is an output device in PLC systems?
A. Push button
B. Proximity sensor
, C. Motor
D. Limit switch
Rationale: Motors act as outputs controlled by PLCs.
Correct Answer: C. Motor
8.
What is a relay used for in PLC circuits?
A. Data processing
B. Signal amplification and switching
C. Cooling system
D. Programming
Rationale: Relays switch electrical circuits.
Correct Answer: B. Signal amplification and switching
9.
Which robot type is commonly used in industrial assembly
lines?
A. Humanoid robot
B. SCARA robot
C. Space robot
D. Service robot
Rationale: SCARA robots are widely used for assembly tasks.
Correct Answer: B. SCARA robot