What is the primary function of a sensor in an automation system?

• To convert mechanical energy into electrical energy

• To detect physical changes and convert them into electrical signals

• To amplify electrical signals

• To control the power supply in a system

Which of the following is a type of transducer?

• Microcontroller

• Thermocouple

• Motor

• Relay

What is the main difference between a sensor and a transducer?

• A sensor converts physical quantities into electrical signals, while a transducer converts one form of energy into another

• A transducer processes data, while a sensor measures temperature only

• A sensor stores data, while a transducer communicates with actuators

• A transducer only detects motion, while a sensor detects pressure

Which of the following is an example of a control system in automation?

• Power supply

• Programmable Logic Controller (PLC)

• Temperature sensor

• Diode

What kind of signal does a temperature sensor typically output?

• Light signal

• Electrical signal

• Magnetic signal

• Mechanical signal

Which sensor is commonly used to detect the proximity of an object without contact?

• Ultrasonic sensor

• Pressure sensor

• Humidity sensor

• Thermistor

What is the primary role of an actuator in an automation control system?

• To sense environmental changes

• To provide feedback to the control system

• To execute commands by producing a mechanical action

• To convert signals into data

Which of the following sensors is best for measuring pressure in an industrial system?

• Strain gauge

• Pressure transducer

• Light-dependent resistor

• Infrared sensor

In a closed-loop control system, what does the feedback element do?

• Provides the desired output to the system

• Sends information about the actual output to the controller

• Sets the input for the system

• Directly controls the actuators

Which of the following transducers converts mechanical motion into an electrical signal?

• Potentiometer

• Light-emitting diode (LED)

• Piezoelectric transducer

• Capacitor