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Mechatronics Multiple-Choice Questions (MCQs)
Mechatronics is an interdisciplinary branch of engineering that is related to the study of the integration
of mechanical, electrical, and electronic engineering systems.
Mechatronics MCQs: This section contains Mechatronics Multiple-Choice Questions with Answers. These
MCQs are written for beginners as well as advanced, practice these MCQs to enhance and test the
knowledge of Mechatronics.
List of Mechatronics MCQs
1. Structures such as gear, linkages, and belts fall under which of the following types of components in a
mechatronics system?
Electrical component
Electronic component
Control system
Mechanical components
Answer: D) Mechanical components
Explanation:
Mechanical components in mechatronic systems include mechanical structures, actuators (such as
motors, linkages, gears, and other mechanical elements that enable motion.
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2. In mechatronics, are stepper motors an actuator or a sensor?
Actuators
Sensors
Answer: A) Actuators
Explanation:
In mechatronics systems, stepper motors are actuators, not sensors.
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3. Which of the following is not a sensor?
Strain gauge
Switches
Servomotor
Potentiometer
Answer: C) Servomotor
Explanation:
Servomotor does not fall in the category of the sensor rather it is an actuator.
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4. Which of the following statement is True about closed-loop control systems?
A closed-loop control system exists when no feedback device compares the actual value to the desired
value
A closed-loop control system exists when there is a feedback device that compares the actual value to
the desired value
Answer: B) A closed-loop control system exists when there is a feedback device that compares the actual
value to the desired value.
Explanation:
A closed-loop control system exists when there is a feedback device that compares the actual value to
the desired value.
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5. How many primary types of control systems exist in mechatronics?
Answer: D) 2
Explanation:
In mechatronics, there are two types of control systems:
Closed loop system
Open loop system
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6. What is the other name of an open-loop control system?
Feedback control system
Non-feedback control system
Answer: B) Non-feedback control system
Explanation:
The other name of the open-loop control system is the non-feedback control system.
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7. Based on design, which of the following control systems is simpler?
Closed loop control systems
Open-loop control systems
Answer: B) Open-loop control systems
Explanation:
Based on the design, open-loop control systems are simpler in design as compared to closed-loop
control systems.
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8. Which of the following control systems is more accurate and resilient?
Closed loop control systems
Open-loop control systems
Answer: A) Closed loop control systems
Explanation:
When compared to open-loop control systems, closed-loop control systems are more accurate and
resilient.
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9. In which of the following control system, changes in output can only be remedied by manually
adjusting the input?
Closed loop control systems
Open-loop control systems
Answer: B) Open-loop control systems
Explanation:
Changes in output can only be remedied in open-loop control systems by manually adjusting the input.
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10. Pick the odd one out in terms of the control system?
Traffic signals
Irrigation system
Washing machine
Robotic arm control
Answer: D) Robotic arm control
Explanation:
From all the given examples robotic arm control is an example of a closed-loop control system and the
rest of them are examples of open-loop control systems.
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11. Which of the following is not true about actuators?
Position is controlled via actuators
To overcome resistance, actuators provide force or torque
Actuators are devices that detect and measure physical occurrences
Actuators are devices that receive control signals from the control system
Answer: C) Actuators are devices that detect and measure physical occurrences.
Explanation:
Actuators are devices that detect and measure physical occurrences, which is not true about actuators.
Actuators are not intended to detect or quantify physical events.
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12. Mechatronic systems deal with how many types of signals and conditioning?
Answer: C) 2
Explanation:
Mechatronic systems deal with two sorts of signals and conditioning: input and output.
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13. A ____ is an electronic device that transfers one type of energy or physical quantity into another.
Sensor
Transducers
Actuators
Answer: B) Transducers
Explanation:
A transducer is an electronic device that transfers one type of energy or physical quantity into another.
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14. The difference between the minimum and maximum values of the input that can be measured
accurately by a sensor is known as ____.
Span
Range
Error
Accuracy
Answer: A) Span
Explanation:
The difference between the minimum and maximum values of the input that can be measured
accurately by a sensor is known as span.
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15. The degree of agreement between a measured value and the real or expected value is referred to as
____.
Resolution
Range
Error
Accuracy
Answer: D) Accuracy
Explanation:
The degree of agreement between a measured and the real or expected value is referred to as accuracy.
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16. The discrepancy between the measurement result and the real value of the quantity being measured
is referred to as ____.
Error
Resolution
Range
Precision
Answer: A) Error
Explanation:
The discrepancy between the measurement result and the real value of the quantity being measured is
referred to as an error.
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17. The lowest observable incremental change in an input parameter that can be detected in the output
signal is referred to as ____.
Linearity
Resolution
Range
Precision
Answer: B) Resolution
Explanation:
The lowest observable incremental change in an input parameter that can be detected in the output
signal is referred to as resolution.
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18. What do you mean by stability in sensors?
Stability is the capacity of a sensing device to produce different results when used to measure a constant
input across time
Stability is the capacity of a sensing device to produce the variation in result when used to measure a
constant input/output across time
Stability is the capacity of a sensing device to produce the same result when used to measure a constant
input across time
Answer: C) Stability is the capacity of a sensing device to produce the same result when used to measure
a constant input across time.
Explanation:
Stability is the capacity of a sensing device to produce the same result when used to measure a constant
input across time.
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19. Which kind of sensor in mechatronics can detect the presence or absence of items or targets within
its sensing range without requiring physical contact?
Displacement sensor
Proximity sensor
Position sensor
Velocity sensor
Answer: B) Proximity sensor
Explanation:
A proximity sensor is a mechatronics sensor that detects the presence or absence of items or targets
within its sensing range without requiring physical contact.
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20. Which of the following are used in machine tools for force measurement, hydraulic or pneumatic
presses, and as impact sensors in aeronautical vehicles?
Potentiometer
Capacitive element sensor
Strain gauges
Optical encoders
Answer: C) Strain gauges
Explanation:
Strain gauges are used in machine tools for force measurement, hydraulic or pneumatic presses, and as
impact sensors in aeronautical vehicles.
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21. Non-magnetic yet conductive materials are detected using which of the following type of sensor?
Pneumatic Sensors
Eddy current proximity sensors
Linear variable differential transformer (LVDT)
Inductive proximity switch
Answer: B) Eddy current proximity sensors
Explanation:
Non-magnetic yet conductive materials are detected using eddy current proximity sensors.
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22. Which of the following type of sensor detects changes in infrared radiation or heat levels?
Force sensor
Hall effect sensor
Velocity sensor
Pyroelectric sensor
Answer: D) Pyroelectric sensor
Explanation:
A pyroelectric sensor detects changes in infrared radiation or heat levels.
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23. Which type of sensor includes photo registers and photodiodes?
Liquid Flow sensor
Temperature sensor
Light sensor
Velocity and motion sensor
Answer: C) Light sensor
Explanation:
Photoresistors and photodiodes are both types of light sensors.
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24. A ____ is a type of semiconductor that transforms light energy into electrical current.
Photo Register
Photodiode
Answer: B) Photodiode
Explanation:
A photodiode is a type of semiconductor that transforms light energy into electrical current.
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25. Among photo register and photodiodes which of them have a faster reaction time?
Photo Register
Photodiode
Answer: B) Photodiode
Explanation:
When compared to photoresistors, photodiodes have a faster reaction time.
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26. Multiplexers are capable of handling which kind of applications?
Analog applications
Digital applications
Both
Answer: C) Both
Explanation:
Multiplexers can handle both Analog and digital applications.
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27. What is the other name of a demultiplexer?
Digital multiplexer
Decoder multiplexer
Data distributors
Data decoders
Answer: C) Data distributors
Explanation:
The other name of the demultiplexer is data distributors.
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28. The microprocessor communicates and works using which of the following number system?
Binary number system
Hexadecimal number system
Decimal number system
Answer: A) Binary number system
Explanation:
The microprocessor communicates and works using the binary numbers 0 and 1.
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29. An application called ____ is used to convert the assembly-level language to binary machine-level
code.
Compiler
Assembler
Answer: B) Assembler
Explanation:
An application called an assembler is used to convert the assembly-level language to binary machine-
level code.
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30. The 8085 microprocessor includes how many registers?
Answer: A) 6
Explanation:
The 8085 microprocessors have 6 main registers.
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31. The general architecture and structure of the mechatronic system are developed during which stage
of mechatronics design?
Requirement analysis
Detailed design
System design
Component selection and integration
Answer: C) System design
Explanation:
The general architecture and structure of the mechatronic system are developed during the system
design stage.
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32. At which of the following stages criteria and specifications of the mechatronic system are specified?
Requirement analysis
Detailed design
Documentation and production
Component selection and integration
Answer: A) Requirement analysis
Explanation:
The criteria and specifications of the mechatronic system are specified at the requirement analysis
stage.
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33. Which of the following is the final stage in the mechatronics design process?
System integration and validation
Detailed design
Documentation and production
Component selection and integration
Prototyping and testing
Answer: C) Documentation and production
Explanation:
The last stage entails documenting the mechatronic system's design, specs, and operation instructions.
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34. Which of the following is not a fundamental building component of mechanical systems which
includes forces and straight-line displacement without rotating?
Spring
Capacitance
Dashpot
Mass
Answer: B) Capacitance
Explanation:
Spring, dashpot, and mass are the fundamental building components of mechanical systems that include
forces and straight-line displacement without rotating.
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35. Which of the following is not a fundamental electrical building block?
Moment of inertia
Inductors
Capacitors
Resistors
Answer: A) Moment of inertia
Explanation:
Inductors, capacitors, and resistors are the fundamental electrical building blocks.
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36. Which of the following is not a building block of a thermal system?
Thermal resistance
Thermal capacitance
Thermal inductors
Answer: C) Thermal inductors
Explanation:
There are just two building blocks in a thermal system:
Thermal resistance
Thermal capacitance
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37. Which control modes in mechatronics can assist minimize steady-state error but do not eliminate it?
On/Off control
Integral control
Derivative control
Proportional-Integral-Derivative (PID) Control
Answer: D) Proportional-Integral-Derivative (PID) Control
Explanation:
Proportional control can assist decrease steady-state error but does not eliminate it.
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38. Which control modes in mechatronics calculate the error signal's rate of change and create a control
signal based on it?
On/Off control
Integral control
Derivative control
Proportional-Integral-Derivative (PID) Control
Answer: C) Derivative control
Explanation:
Derivative control modes in mechatronics calculate the error signal's rate of change and create a control
signal based on it.
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39. Which control modes aid in the elimination of steady-state errors?
On/Off control
Integral control
Derivative control
Feedforward control
Answer: B) Integral control
Explanation:
Integral control mode aid in the elimination of steady-state errors.
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40. Which of the following is not true about CNC (computer numerical control) machines?
CNC entails the integration of a control system
CNC machining techniques provide excellent precision and accuracy
CNC lacks sensing capabilities
Only actuators are used in CNC machines in mechatronics
Answer: C) CNC lacks sensing capabilities.
Explanation:
From all the statements given above about CNC, statement C is wrong, CNC machines based on
mechatronics use a variety of sensors to monitor and control machining operations.
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41. Which control mode will minimize the rising time and reduce the steady state error, but not
eliminate it?
On/Off control
Integral control
Derivative control
Proportional control
Answer: D) Proportional control
Explanation:
Proportional control mode that will minimize the rising time and reduce the steady state error, but not
eliminate it?
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42. In mechatronics, ____ control refers to a control system that can dynamically update its parameters
or behavior in response to changes in the system or its surroundings.
Velocity control
Adaptive control
Digital control
Gain scheduling control
Answer: B) Adaptive control
Explanation:
In mechatronics, adaptive control refers to a control system that can dynamically update its parameters
or behavior in response to changes in the system or its surroundings.
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43. What is the full form of PLC in mechatronics?
Programmable logic control
Process logic control
Primary line control
Process line control
Answer: A) Programmable logic control
Explanation:
PLC stands for Programmable logic control.
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44. How many different sorts of outputs can a PLC produce?
Answer: C) 3
Explanation:
There are three different sorts of output:
Relay type
Transistor type
Triac type
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45. Which of the following is not true about FMS (Flexible manufacturing system)?
CNC machines are used by FMS
FMS employs automated material handling technologies
FMS does not rely on modern control systems to coordinate
FMS is outfitted with sensors and actuators
Answer: C) FMS does not rely on modern control systems to coordinate.
Explanation:
FMS does rely on modern control systems to coordinate.
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