134.  Pick up the correct statement from the following :
A. Air lift pumps are generally used for pumping water from deep wells
B. Jet pumps are generally used for pumping water from small wells
C. The hydraulic ram works on the principle of water hammer
D. all the above.

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135.  If the chosen diameter of a pipe, is less than the economical diameter
A. cost of pipe will be less
B. head loss will be high
C. cost of pumping will be more than saving
D. all the above.

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136.  If Q is discharge is cubicmetres per sec and D is the economical diameter of the pipe. According to Lea
A. D = 0.67 to 0.87 -, D = 0.77 to 0.97 AIQ
B. D = 0.97 to 1.22 ArCi
C. D = 1.22 to 1.33 qq.
D.C

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137.  To pump water from a water reservoir 3 m deep and maximum water level at 135 m, a pump is installed to lift water up to R.L. 175 m at a constant rate of 36,00,000 litres per hour. If the length of the pipe is 1506 m and f ignoring other minor losses and assumineg,_the economical diameter from Lea's formula D = 1.2 IQ, the water horse power of the pump is
A.400
B.450
C.500
D.600

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138.  The factor for the selection of pumping station site, is
A. distance of the source of contamination or pollution
B. height above the II.F.L..of the river
C. future expansion
D. all the above.

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139.  Suction lift of a pump depends upon
A. atmospheric preSsure
B. water temperature
C. velocity of water'in suction pipe
D. all the above.

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140.  Pick up the correct statement from the following :
A. The precipitation during its travel in atmosphere dissolves certain gases
B. Rain water which percolates through the ground, is free from suspended materials
C. Under ground water may dissolve minerals and salts present in the earth's layers
D. All the above.

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