Question 11 : Reynold number is the ratio of initial force and
1. elasticity
2. viscosity
3. gravitational force
4. surface tension.
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Question 12 : If the volume of a liquid weighing 3000 kg is 4 cubic metres, 0.75 is its
1. specific mass
2. specific gravity
3. none of these.
4. specific weight
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Question 13 : The shear stress distribution in viscous fluid through a circular pipe is :
1. maximum at the centre
2. none of these.
3. same throughout the section
4. maximum at the inside of surface
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Question 14 : The side slope of Cipolletti weir is generally kept
1. 1 to 2
2. 1 to 4
3. 1:05
4. 1 to 3
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Question 15 : The maximum vacuum created at the summit of a syphon is
1. none
2. 2.7 m of water
3. 5.5 m of water
4. 7.4 m of water
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Question 16 : A syphon is used
1. to supply water to a town from higher level to lower level
2. to connect water reservoirs at different levels intervened by a hill
3. none of these.
4. to fill up a tank with water at higher level from a lower level
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Question 17 : The ratio of maximum velocity to average velocity of viscous fluid through a circular pipe is
1. 2
2. 1.25
3. 0.5
4. 0.75
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Question 18 : A pitot tube is used to measure
1. velocity of flow
2. difference in pressure
3. none of these.
4. pressure
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Question 19 : The thickness of a sharp crested weir is kept less than
1. one-fourth of the height of water on the sill
2. two-third of the height of water on the sill
3. one-third of the height of water on the sill
4. one-half of the height of water on the sill
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Question 20 : The total pressure force on a plane area is equal to the area multiplied by the intensity of pressure at its centroid, if
1. area is horizontal
2. area is inclined
3. all the above.
4. area is vertical
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