Measurement of Water
Maharashtra Board · Class 10 · Water Security
Flashcards for Measurement of Water — Maharashtra Board Class 10 Water Security. Quick Q&A cards covering key concepts, definitions, and formulas.
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What is the device used to measure rainfall called?
Answer
A rain gauge. It is the instrument used to measure rainfall. Rainwater is collected in it and then the amount is measured.
What is the structure of a rain gauge?
Answer
A rain gauge is a cylindrical flat-bottom measuring cylinder with a funnel top. Part of it is buried in the ground. The funnel mouth diameter is 127 mm, the edge height is 110 mm, and the top edge is …
Why is the funnel pipe of a rain gauge made very small?
Answer
The funnel pipe is made very small to prevent evaporation of the collected rainwater. This helps in measuring rainfall more accurately.
How is rainwater height measured in a rain gauge?
Answer
Rainwater height is measured by observing the lower edge of the water level. A water-proof plastic calibrated strip is used for measuring.
When is a daily rain gauge read?
Answer
A daily rain gauge is read once a day at 8.30 am Indian Standard Time.
Why is weighing collected rainwater useful?
Answer
Weighing the collected rainwater helps avoid errors caused by sewage and water sticking to the pot while pouring water into another container. It gives a more accurate measurement.
What instrument is used to measure evaporation?
Answer
An evaporator is used to measure evaporation. It is a shallow rounded iron vessel painted white on both sides and kept on a wooden frame with aeration below.
What are the dimensions of the evaporator?
Answer
The evaporator has a diameter of 1.2 m and a depth of 30 cm.
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