Explore topic-wise MCQs in Arduino.

This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Arduino knowledge and support exam preparation. Choose a topic below to get started.

1.

What is the name of the mesh surrounding the MQ2 Gas Sensor?

A. Anti-Heat Mesh
B. Anti-Explosion Mesh
C. Anti-Air Mesh
D. Filtration Mesh
Answer» C. Anti-Air Mesh
Discussion
2.

What is the full form of the abbreviation called PPM?

A. Parts Per Million
B. Parts Per Milligram
C. Parts Per Megagram
D. Parts Per Millilitre
Answer» B. Parts Per Milligram
Discussion
3.

If the PPM concentration of a gas that is being detected by the MQ2 Gas Sensor increases what will happen to its Analog Output pin?

A. Voltage Increases
B. Voltage Decreases
C. Voltage becomes 0
D. Voltage doesn t change
Answer» B. Voltage Decreases
Discussion
4.

If the PPM concentration of a gas that is being detected by the MQ2 Gas Sensor increases what will happen to its Digital Output pin?

A. Voltage Increases
B. Voltage Decreases
C. Voltage becomes 0
D. Voltage doesn t change
Answer» E.
Discussion
5.

Can the MQ2 Gas Sensor differentiate between two different gases with the same PPM?

A. Yes
B. No
Answer» C.
Discussion
6.

What is the maximum output voltage that the MQ2 Gas Sensor can put out on its analog output pin?

A. 1V
B. 140V
C. 5V
D. 10V
Answer» D. 10V
Discussion
7.

What will happen if we supply a voltage of 25V to the Vcc of the MQ2 Gas Sensor?

A. Damage is caused
B. Module will shut down
C. Module will not respond for the time the voltage is applied
D. Module will function normally
Answer» B. Module will shut down
Discussion
8.

Does the MQ2 Gas Sensor have a fixed sensitivity?

A. Yes
B. No
Answer» C.
Discussion
9.

How many terminals does the MQ2 Gas Sensor have?

A. 1
B. 3
C. 2
D. 4
Answer» E.
Discussion
10.

What is the use of the MQ2 Gas Sensor?

A. Object Identification
B. To provide 3G Connectivity
C. To measure presence of gas
D. To measure Wi-Fi strength
Answer» D. To measure Wi-Fi strength
Discussion