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WorksheetsAY 25-26 ESP 32 Workshop Quiz
Total questions: 30
Worksheet time: 23mins
Name
Class
Date
1.
You want to design a project where ESP32 continuously streams sensor data while also responding to user commands via Bluetooth. Which ESP32 feature makes this possible?
a)
Single-core CPU
b)
Dual-core architecture for parallel tasks
c)
PWM output pins
d)
Sleep mode
2.
A student uploads code to ESP32, but the Serial Monitor shows no data even though the board is working. What is the most logical cause?
a)
Incorrect baud rate setting in Serial Monitor
b)
Wrong Wi-Fi credentials
c)
Damaged OLED module
d)
Pin mismatch for Bluetooth
3.
Which IDE was used in the workshop for ESP32 programming?
a)
Keil uVision
b)
Arduino IDE
c)
MPLAB X
d)
STM32CubeIDE
4.
If you want to measure varying light intensity with ESP32, which type of pin configuration is required?
a)
UART
b)
ADC input
c)
PWM output
d)
I2C bus
5.
The HCSR-04 sensor gives fluctuating readings when used indoors. Which logical improvement would stabilize results?
a)
Increase power supply voltage
b)
Average multiple samples in software
c)
Use LM35 instead
d)
Switch to Bluetooth transmission
6.
A servo motor connected to ESP32 rotates erratically. What is the most logical first check?
a)
Verify that PWM pin frequency and duty cycle are correct
b)
Replace OLED module
c)
Change Wi-Fi SSID
d)
Lower DHT11 sampling rate
7.
If an OLED connected via I2C shows random characters, what is the probable issue?
a)
Incorrect I2C address configured in code
b)
ESP32 does not support I2C
c)
Wi-Fi interference
d)
Serial monitor error
8.
Which sensor in the workshop measures both temperature and humidity?
a)
LM35
b)
DHT11
c)
MQ-6
d)
MPU6050
9.
You want to build a project where ESP32 detects presence via IR sensor and sends alerts to a phone without internet. Which setup is most logical?
a)
IR + Wi-Fi + Blynk
b)
IR + Bluetooth + Serial Bluetooth Terminal
c)
IR + MQ-6 + Thingspeak
d)
IR + Telegram Bot
10.
In Bluetooth communication, why might actuator control feel delayed?
a)
Low baud rate in serial communication
b)
ESP32 does not support actuators
c)
Wrong pin mapping for I2C
d)
Using Thingspeak instead of Blynk
11.
If ESP32 connects to Bluetooth but no data is transmitted to mobile, what should be checked first?
a)
Pairing and COM port configuration
b)
Wi-Fi password
c)
Sensor voltage rating
d)
OLED driver IC
12.
Which mobile app was used for Bluetooth-based testing?
a)
Telegram
b)
Blynk
c)
Serial Bluetooth Terminal
d)
WhatsApp
13.
Which logical advantage does Blynk provide compared to Serial Bluetooth Terminal?
a)
It works without internet
b)
Enables remote IoT monitoring over Wi-Fi
c)
Requires no sensors
d)
Uses less flash memory
14.
A student sets wrong Wi-Fi credentials in ESP32 code. What will the board do?
a)
Shut down
b)
Keep retrying connection without success
c)
Send wrong data
d)
Switch to Bluetooth
15.
If KY-038 sound sensor shows no variation despite noise, what is the most logical fix?
a)
Adjust threshold and ADC pin configuration
b)
Replace with DHT11
c)
Change Wi-Fi SSID
d)
Add MQ-6 sensor
16.
A project requires sending temperature data to a smartphone in real time with graphs. Which combination fits best?
a)
LM35 + Wi-Fi + Blynk
b)
LM35 + Bluetooth + OLED
c)
Flame sensor + Wi-Fi + Thingspeak
d)
MPU6050 + Bluetooth
17.
Why is Thingspeak more suitable than Blynk for long-term data logging?
a)
Works without internet
b)
Provides cloud storage + graphical plotting
c)
Requires no libraries
d)
Works only with ESP8266
18.
A student’s flame sensor data is visible on Serial Monitor but not on Thingspeak. What is the logical issue?
a)
Incorrect API key or channel configuration
b)
Damaged flame sensor
c)
Wi-Fi password too long
d)
ESP32 lacks ADC
19.
If the MAX30100 module shows unstable pulse readings, which solution is most logical?
a)
Ensure proper finger placement and reduce noise in code
b)
Replace with DHT11
c)
Add MQ-6 gas sensor in parallel
d)
Lower Wi-Fi frequency
20.
For an automated plant watering system, why combine soil moisture and water level sensors?
a)
To reduce ESP32 processing load
b)
To decide both irrigation need and tank status
c)
To replace OLED display
d)
To make Wi-Fi faster
21.
In the ESP32-CAM face detection project, why is dual-core architecture important?
a)
One core handles Wi-Fi, another processes camera tasks
b)
Both cores reduce power usage
c)
It avoids using fingerprint module
d)
Provides extra GPIO pins
22.
A fingerprint attendance project using AS608 fails to record data. What is the most logical first check?
a)
UART wiring and baud rate settings
b)
Change Wi-Fi SSID
c)
Replace ESP32 board
d)
Use Telegram bot instead
23.
Why is fingerprint attendance logically more secure than password entry?
a)
Biometric uniqueness reduces spoofing risk
b)
Requires no hardware
c)
Works without ESP32
d)
Consumes less current
24.
If ESP32-CAM face detection is too slow, what optimization helps?
a)
Reduce image resolution in code
b)
Use DHT11 instead
c)
Add KY-038 microphone
d)
Switch to Bluetooth mode
25.
The MPU6050 module helps in:
a)
Measuring 3-axis motion and orientation
b)
Detecting flame intensity
c)
Checking humidity
d)
Storing fingerprint data
26.
Why are three axes needed in MPU6050-based tilt detection?
a)
To compute accurate orientation in 3D space
b)
To enable Wi-Fi activation
c)
To measure humidity
d)
To reduce current draw
27.
A tilt detection system fails to update data on Telegram. What is the logical troubleshooting step?
a)
Check Wi-Fi connectivity and bot authentication token
b)
Replace MPU6050
c)
Increase OLED brightness
d)
Add MQ-6 gas sensor
28.
In ESP32 + Telegram home automation, which advantage does Telegram bring compared to Bluetooth apps?
a)
Enables control from anywhere with internet access
b)
Works without sensors
c)
Requires no libraries
d)
Consumes zero power
29.
A student wants to trigger an alarm if tilt > threshold. What logical implementation fits best?
a)
Set MPU6050 threshold in code and control buzzer via GPIO
b)
Use DHT11 humidity values
c)
Transmit using IR sensor
d)
Log values to Serial Monitor only
30.
Which advanced project from the workshop combined both sensing and automation using cloud integration?
a)
Automated plant watering system (soil moisture + Thingspeak)
b)
Servo motor demo via Bluetooth
c)
Basic LDR interfacing with OLED
d)
Temperature reading with LM35 only
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