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WorksheetsIoT Experiments and Technologies - Multiple Choice Questions
Total questions: 30
Worksheet time: 15mins
Which of the following boards is most commonly used in basic IoT experiments?
Arduino UNO
NVIDIA Jetson
Intel Xeon Server
PlayStation Console
Which sensor is commonly used to measure temperature and humidity in IoT projects?
LDR
DHT11
MQ-2
PIR
What does LDR stand for in IoT sensor experiments?
Light Density Receiver
Light Dependent Resistor
Low Data Resistor
Linear Data Recorder
In an IoT experiment, a PIR sensor is mainly used for detecting:
Gas leakage
Light intensity
Human motion
Temperature
Which communication module is commonly used to connect IoT devices to Wi-Fi?
ESP8266
LM35
MPU6050
DHT22
Which of the following protocols is most commonly used for IoT device-to-device messaging?
SMTP
MQTT
FTP
IMAP
Which cloud platform is widely used for IoT data visualization in experiments?
AWS IoT Core
Google Drive
YouTube
The LM35 sensor in IoT experiments measures:
Humidity
Temperature
Distance
Sound
Which Arduino function is used to send data to the serial monitor?
Serial.print()
Serial.in()
Serial.send()
Serial.read()
In a basic IoT experiment, which device can be controlled using a relay module?
Cloud server
AC lamp
Wi-Fi module
Ultrasonic sensor
Which of the following is an ultrasonic sensor used in IoT projects?
HC-SR04
MQ-135
PIR
BMP180
The unit of measurement for distance in ultrasonic IoT experiments is usually:
Pascal
Celsius
Centimeters
Joules
Which protocol is commonly used to send IoT sensor data to web applications?
HTTP
POP3
DNS
ARP
Which of the following IoT development boards has built-in Wi-Fi support?
Arduino Nano
Raspberry Pi Zero W
Intel 8086
Which IoT sensor is typically used for air quality monitoring?
MQ-2
LDR
DHT11
HC-SR04
In IoT experiments, GPIO pins are primarily used for:
Displaying cloud data
Uploading code
Interfacing with sensors and actuators
Debugging software
What type of actuator is typically used in IoT experiments for controlling physical movement?
DC Motor
Ultrasonic sensor
Wi-Fi Module
Gas sensor
Which of the following is NOT an IoT wireless communication technology?
Zigbee
LoRa
Bluetooth
SMTP
Which function of Arduino is used to initialize code only once at the beginning?
loop()
start()
setup()
begin()
What is the main role of ThingSpeak in IoT experiments?
To provide programming IDE
To act as a cloud platform for storing and analyzing sensor data
To control microcontrollers
To convert analog to digital signals
Which power supply is typically required for running an Arduino UNO board?
3.3V DC
5V DC
9V AC
In IoT experiments, which sensor is used to detect flame/fire?
LDR
IR Flame Sensor
MQ-7
PIR
The term “actuator” in IoT refers to a device that:
Stores sensor data
Displays information
Converts electrical signals into physical action
Connects to cloud servers
The command digitalWrite(LED, HIGH); in Arduino is used to:
Switch off the LED
Blink the LED
Switch on the LED
Reset the LED pin
Which IoT module is often used for GSM-based communication?
ESP32
SIM800L
DHT22
HC-SR04
In IoT experiments, the BMP180 sensor is used for measuring:
Pressure and altitude
Sound intensity
Humidity
Light
What is the range of a typical HC-SR04 ultrasonic sensor?
2–400 cm
0–10 km
100–500 m
1–100 mm
Which IoT experiment uses RFID technology?
Smart irrigation
Smart attendance system
Smart lighting
Which communication protocol is preferred for IoT due to lightweight data transfer?
FTP
MQTT
SMTP
POP3
Which IoT experiment involves controlling home appliances using a mobile app?
Smart lighting system
Smart weather station
Smart irrigation system
Smart parking system
