To replace a pipe of diameter D by n parallel pipes of diameter d, the formula i

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To replace a pipe of diameter D by n parallel pipes of diameter d, the formula is
Options
A.
B.
C.
D.
E.

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3. The flow in a channel is said to be non-uniform, if
Options
A. free water surface of an open channel is not parallel to the bed of channel
B. head needed to overcome frictional reistance is less than the drop in elevation of channel bed
C. head needed to overcome frictional resistance is more than the drop in elevation of channel bed
D. all the above.

5. The intensity of pressure due to sudden closure of a valve of a pipe in which water flows with velocity v, is directly proportional to :
Options
A. square root of the bulk modulus of elasticity of water
B. bulk modulus of elasticity of water
C. specific weight of water
D. none of these.

6. In a short cylindercial external mouthpiece, the venacontracta occurs at a distance from the outlet of orifice equal to
Options
A. diameter of the orifice
B. one-fourth the diameter of the orifice
C. one-third the diameter of the orifice
D. two-third the diameter of the orifice

9. An open container filled with water is moved vertically upward with a uniform linear acceleration. The pressure at its bottom will be
Options
A. greater than static pressure
B. equal to static pressure
C. lesser than static pressure
D. none of these.

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