1. If the diameter of a capillary tube is doubled, the capillary rise will be:
(a) Unaffected
(b) Doubled
(c) Halved
(d) None of the above
Answer: c
2. The rotation of a bucket containing water and rotating about its vertical axis at constant speed shall produce:
(a) Free vortex
(b) Forced vortex
(c) Both of the above depending on the speed of rotation
(d) None of the above
Answer: b
3. The hydraulic grade line is:
(a) Always above the center line of pipe
(b) Never above the energy grade line
(c) Always sloping downward in the direction of flow
(d) All of the above
Answer: b
4. In defining the Froude number applicable to channels of any shape, the length parameter used is the:
(a) Depth of flow
(b) Hydraulic radius
(c) Wetted perimeter
(d) Ratio of area to top width
Answer: d
5. The flow in open channel is turbulent if the Reynolds number is:
(a) 2000
(b) More than 2000
(c) More than 4000
(d) 4000
Answer: b
6. The term 'alternate depths' in open channel flow refers to the:
(a) Depths having the same specific energy for a given discharge.
(b) Depth before and after the passage of the surge.
(c) Depth having the same kinetic energy for a given discharge.
(d) Depth on either side of a hydraulic jump.
Answer: a
7. In open channels, maximum velocity occurs:
(a) Just below the free surface
(b) At the surface
(c) Near the channel bottom
(d) In the mid-depth of flow
Answer: a
8. Flow of water through a passage under atmosphere pressure is called:
(a) Pipe flow
(b) Uniform flow
(c) Open channel flow
(d) Non uniform flow
Answer: c
9. The dimensions of Chezy's C is:
(a) Non-dimensional
(b) L/T
(c) LT
(d) [L/T-2]1/2
Answer: d
10. The hydraulic radius is given by:
(a) Wetted perimeter divided by area
(b) Area divided by square of wetted perimeter
(c) Area divided by wetted perimeter
(d) Square root of area
Answer: c