IoT Components MCQs: Control Units and Sensors

Which device typically acts as the control unit in an IoT system?

• Sensor

• Actuator

• Microcontroller

• Diode

What is a sensor in an IoT context?

• Device to trigger an action

• Device to measure physical properties

• Processor

• Software module

Which sensor is used to detect motion?

• Temperature sensor

• PIR sensor

• Pressure sensor

• Humidity sensor

Which sensor is commonly found in smart irrigation systems?

• Pressure sensor

• Soil moisture sensor

• Gas sensor

• Ultrasonic sensor

Which one is NOT a typical sensor in IoT?

• GPS sensor
• Smoke Sensor

• Capcitor

• Accelerometer

Actuators in IoT systems are responsible for:

• Sensing environmental data

• Performing actions

• Communication

• Data logging

Which actuator is used to open and close a valve automatically?

• Relay

• Motor

• Switch

• Sensor

Which module offers short-range wireless communication and low power in IoT?

• Zigbee

• Fiber optic

• Ethernet

What does WiFi stand for?

• Wireless Fidelity

• Wide Field

• Wire Free

• Wired Fiber

Which communication technology operates in the 2.4 GHz ISM band?

• Zigbee

• Bluetooth

• WiFi

• All of the above