Quiz on IoT , Sensors and OSI Layers

Which of the following is NOT a layer in the IoT 4-layer architecture?

• Perception Layer

• Processing Layer

• Communication Layer

• Cloud Layer

The role of the Perception Layer in IoT is:

• Data storage

• Collecting physical data using sensors

• Enabling cloud connectivity

• Providing user interfaces

Which type of sensor is typically used to measure atmospheric or fluid pressure?

• Temperature Sensor

• Proximity Sensor

• Pressure Sensor

• Flow Sensor

Which of the following is an application of a proximity sensor?

• Detecting changes in temperature

• Detecting objects without physical contact

• Measuring air quality

• Monitoring humidity levels

A temperature sensor that uses resistance variation to measure temperature is called:

• Thermocouple

• RTD (Resistance Temperature Detector)

• Thermistor

• Piezoelectric Sensor

Which sensor is used for detecting the presence of specific gases like CO2, CH4, or CO?

• Humidity Sensor

• Gas Sensor

• Pressure Sensor

• Flow Sensor

An accelerometer measures:

• Linear and angular acceleration

• Fluid flow rate

• Ambient temperature

• Humidity levels in the atmosphere

Imaging sensors are most commonly used in:

• Automotive safety systems

• Smartphones for capturing photos and videos

• Weather forecasting

• Fluid level measurement

Which of the following is NOT a characteristic of sensors?

• Accuracy

• Responsiveness

• Signal-to-Noise Ratio

• Size of the sensor element

Active sensors require:

• An external power source for operation

• No physical interaction with the environment

• A completely isolated setup

• A real-time processing unit