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Tube Well MCQ Questions & Answers

Tube Well MCQs : This section focuses on the "Tube Well". These Multiple Choice Questions (MCQs) should be practiced to improve the Tube Well skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.




Question 1

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

A. strainer type
B. cavity type
C. slotted type
D. both cavity and slotted type

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Question 2

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

A. cracked and faulted rock
B. alluvium
C. alluvium and various layers of sandy soil, clayey soil, and gravel
D. clayey soil

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Question 3

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

A. rotary drilling rigs
B. percussion drilling rigs
C. down the hole hammer (DTH) rigs
D. cable method of drilling

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Question 4

Corrosion of tubewell pipes may cause _______________

A. reduced discharge from the tubewell
B. excessive discharge of sand with water
C. discharge of highly alkaline water
D. increased pumping rate

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Question 5

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

A. well irrigation is a minor scheme
B. well water is lifted immediately and cannot be expressed in ha/m3/sec
C. well is situated in the middle of the commanded area
D. wells are owned by cultivators and so the source of supply is a private one

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Question 6

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

A. > 2.0
B. < 2.0
C. > 2.5
D. < 2.5

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Question 7

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

A. 9 – 12.5
B. 12 – 15.5
C. > 15.5
D. < 9

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Question 8

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

A. True
B. False

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Question 9

Incrustation of the tubewell pipes may lead to _________________

A. reduced discharge from the tubewell
B. excessive discharge of sand with water
C. discharge of highly alkaline water
D. increased pumping rate

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Question 10

Reversing the direction of flow by surging the well does help in removing the bridging.

A. True
B. False

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Question 11

The amount of water required from wells to mature a similar crop is more than that required in canal irrigation.

A. True
B. False

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Question 12

The appropriate life of a tubewell in India is of the order of ______

A. 1 year
B. 2 years
C. 5 years
D. 15 years

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Question 13

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

A. 30%
B. 65%
C. 90%
D. 95%

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Question 14

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

A. cavity well
B. strainer tube well
C. slotted pipe gravel packed tube well
D. both cavity and strainer tube well

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Question 15

What is Pack Aquifer Ratio?

A. D50 of the gravel / D50 of the aquifer
B. D50 of the aquifer / D50 of the gravel
C. D60 of the aquifer material / D10 of the aquifer material
D. D60 of the gravel / D10 of the aquifer

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Question 16

What is the measure of the fineness of an aquifer?

A. Average grain size
B. Effective diameter
C. Mean particle size
D. Uniformity coefficient

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Question 17

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

A. 5 L/sec
B. 50 L/sec
C. 500 L/sec
D. 5000 L/sec

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Question 18

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

A. Percussion drilling
B. Wash boring method
C. Rotary boring method
D. Reverse rotary method

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Question 19

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

A. Cable tool method
B. Water-jet boring method
C. Hydraulic Rotary method
D. Reverse Rotary method

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Question 20

Which log represents the type of strata existing at different depths and encountered during digging or boring of the wells?

A. Well logs
B. Resistivity logs
C. Radiometric logs
D. Sonic logs

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Question 21

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

A. Percussion drilling
B. Wash boring method
C. Rotary boring method
D. Reverse rotary method

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Question 22

Which of the following gives an indication of the chemical quality of the groundwater?

A. Geological logs
B. Resistivity logs
C. Sonic logs
D. Thermal logs

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Question 23

Which of the following is an effective method for the development of well?

A. Surging
B. Pumping
C. Well development by compressed air
D. Jetting

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Question 24

Which of the following pump can effectively lift water under the maximum suction head of 6 to 8 meters?

A. A single-stage centrifugal pump
B. Submersible pumps
C. Turbine pumps
D. Jet pumps

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Question 25

Which of the following pumps is also used for testing or development of wells?

A. Vertical turbine pump
B. Submersible motor pump
C. Jet pump
D. Airlift pump

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Question 26

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

A. Continuous slot type of strainer
B. Louver type of strainer
C. Pipe strainer with fine mesh jackets
D. Coir rope strainers

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Question 27

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?

A. Strainer type tubewell
B. Abyssinian tubewell
C. Cavity type tubewell
D. Slotted type tubewell

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