Q. Mota layer sometimes is also known as Marbarwa or Magasan is an impervious layer.

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Q. A well is to be constructed in a fine sandy sub-soil formation. The discharge of the well under the depression head of 4 m is 0.004 m³/sec. Calculate the diameter of the well.

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Q. The most widely used type of a deep state tube well in India is __________

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Q. The general average yield from standard tube wells is of order of____________

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Q. Which of the following tubewell is suitable when a deep bearing stratum lies below an impervious layer and water contribution can take place through bottom only?

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Q. In cavity tubewell, there is a possibility of water tapping through sides and the flow is radial.

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Q. What is the measure of the fineness of an aquifer?

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Q. What is Pack Aquifer Ratio?

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Q. According to the Central Board of Irrigation and Power, the PA ratio for graded aquifer should be _______________

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Q. For good design, the uniformity coefficient (Cᵤ) of the gravel material should preferably be ______

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Q. The efficiency of the centrifugal pumps commonly used for lifting water from wells may be of the order of _____________

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Q. A tube well is suitable when the subsoil formation is made up of _____________________

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Q. Bored tube wells in rocky consolidated formations as are encountered in the South Indian States of our country are usually drilled by _____________

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Q. Which of the following drilling method is unsuitable in loose formations such as unconsolidated sand and gravel or quicksand?

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Q. Which drilling method is best suited for underground formations made of gravel, sand and clayey deposits?

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Q. Which is the fastest method of drilling and especially useful in unconsolidated formations?

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Q. A household tube well is called Abyssinian tube well falls under _________

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Q. Duty of wells expressed in hectares the well can irrigate to bring a crop to maturity because of ___________

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Q. Which of the following strainer is used for shallow irrigation tube wells particularly in deltaic regions of developing countries?

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Q. Rewhiding the well involves ____________________

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