Q. Which colour does not reflect infrared rays?

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Q. Which IC (integrated circuit) is present on NodeMCU?

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Q. Arduino UNO is a microcontroller board based on ESP8266 IC.

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Q. IR sensors can’t work in dark environment.

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Q. Which sensor one should prefer for detecting black objects?

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Q. Which sensor should one prefer for accurate measurement of distance upto 1 meter?

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Q. Which factor affects the least while selection of sensor?

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Q. What is the SI unit of flow rate of a Liquid or fluid?

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Q. Which is a Liquid flow sensor?

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Q. Which liquid will have more mass for same amount of volume?

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Q. Which liquid will have more mass for same amount of volume?

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Q. Which liquid has lowest density?

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Q. Which is a mass flow meter?

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Q. What is the flow rate of a liquid flowing through a cylindrical pipe of cross section area 0.2 m² and velocity of the liquid is 0.5 m/s?

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Q. What is the flow rate of a liquid flowing through a cylindrical pipe of radius 0.2 m and velocity of the liquid is 0.5 m/s?

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Q. Which is a gas flow meter?

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Q. Ultrasonic flow meter works on Doppler Effect.

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Q. High turbidity is bad for aquatic life.

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Q. What is the SI unit of volumetric flow rate?

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Q. What is the flow rate of a liquid flowing through a cylindrical pipe of radius 0.1 m and velocity of the liquid is 0.5 m/s?

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