Virtual Labs

To simulate interfacing of multiple sensors (Ultrasonic sensor, PIR Sensor, DHT sensor, Soil Moisture, MQ135 Sensors) with Arduino.

1. What does PIR stand for?

a: Passive Infrared Explanation

Explanation

b: Primary Internal Resistor Explanation

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c: Peripheral Input Receiver Explanation

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d: Pulse Infra Range Explanation

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2. Which sensor is used for measuring distance?

a: PIR sensor Explanation

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b: Ultrasonic sensor Explanation

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c: DHT sensor Explanation

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d: MQ135 sensor Explanation

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3. DHT sensor measures which two parameters?

a: Temperature and humidity Explanation

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b: Pressure and altitude Explanation

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c: Gas levels and dust Explanation

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d: Light intensity and color Explanation

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4. Soil moisture sensor gives which type of output?

a: Digital only Explanation

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b: Analog only Explanation

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c: Both analog and digital Explanation

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d: PWM only Explanation

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5. MQ135 sensor is used for detecting ___.

a: Temperature Explanation

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b: Humidity Explanation

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c: Air quality and gases Explanation

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d: Sound intensity Explanation

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6. Ultrasonic sensor uses which waves?

a: Light waves Explanation

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b: Infrared waves Explanation

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c: Microwaves Explanation

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d: High-frequency sound waves Explanation

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7. PIR detects motion using which type of radiation?

a: Ultraviolet radiation Explanation

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b: Visible light Explanation

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c: Infrared radiation Explanation

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d: X-ray radiation Explanation

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8. DHT sensor communicates through which method?

a: Digital single-wire protocol Explanation

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b: I2C protocol Explanation

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c: SPI protocol Explanation

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d: UART protocol Explanation

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9. Which sensor is used for air quality detection?

a: MQ135 Explanation

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b: PIR sensor Explanation

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c: Ultrasonic sensor Explanation

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d: DHT sensor Explanation

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10. Soil moisture sensor is useful in which IoT domain?

a: Smart agriculture Explanation

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b: Smart lighting Explanation

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c: Smart parking Explanation

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d: Home security Explanation

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