Certification Practice Exam Questions

Mechatronics Technician Level I Certification Practice Exam Questions And Correct Answers (Verified Answers) Plus Rationales 2026 Q&A | Instant Download Pdf

1. A mechatronic system is best defined as the integration of:

• Civil structures and embedded computing
• Optical design and thermodynamics
• Mechanical, electrical, and computer/control systems
• Hydraulic and nuclear systems

This answer is correct because mechatronics fundamentally combines mechanical, electrical, and control/computing elements to form integrated systems.

2. The primary function of a PLC in a mechatronic system is:

• Power distribution
• Direct physical actuation 1 / 4

• Logic control and automation sequencing
• Data encryption

PLCs execute logic instructions and sequence automated machine operations.

• Which sensor is most appropriate for detecting metal object presence?
• Ultrasonic sensor
• Inductive proximity sensor
• Thermistor
• Gyroscope

Inductive sensors respond to metal targets using electromagnetic fields.

4. A closed-loop control system differs from open-loop by:

• Using only mechanical components
• Incorporating feedback to correct output
• Eliminating sensors
• Reducing signal noise entirely

Closed-loop control relies on feedback to maintain desired output.

5. Ohm’s Law states that:

A. P = VI

B. V = IR

• F = ma
• Q = mcΔT 2 / 4

Ohm’s Law expresses the linear relationship between voltage, current, and resistance.

6. A relay is commonly used to:

• Measure current
• Electrically isolate and switch high-power loads
• Compress air
• Reduce DC voltage

Relays allow low-power control circuits to operate high-power loads safely.

• Which device converts electrical energy into mechanical rotational

motion?

• Solenoid
• Electric motor
• Resistor
• Rectifier

Motors provide rotational mechanical motion from electrical input.

8. The primary purpose of a solenoid valve is:

• Regulate voltage
• Control fluid or air flow using an electromagnetic actuator
• Monitor temperature
• Generate torque

Solenoid valves use electromagnetic force to open or close fluid pathways. 3 / 4

9. In ladder logic, a normally open (NO) contact symbol means:

• Always energized
• Conducts when the controlling device is energized
• Conducts when de-energized
• Used only for analog signals

NO contacts close and pass current when the input condition becomes true.

10. A strain gauge measures:

• Temperature
• Deformation due to applied force
• Magnetic flux
• Light intensity

Strain gauges change resistance in proportion to deformation.

11. The SI unit of force is:

• Dyne
• Newton
• Joule
• Watt

Force is measured in newtons in SI units.

12. The function of a rectifier is to:

• Step up AC voltage
• Convert AC to DC
• Store electrical energy
• / 4