Mechanical Engineering - Hydraulics and Fluid Mechanics
Exercise :: Hydraulics and Fluid Mechanics - Section 3
| 36. |
When the coefficient of discharge (Cd) is 0.623, then the general equation for discharge over a rectangular weir is |
| A. |
1.84(L - 0.1nH)H3/2 | | B. |
1.84(L - nH)H2 | | C. |
1.84(L - 0.1nH)H5/2 | | D. |
1.84(L - nH)H3 |
Answer: Option A
Explanation:
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| 37. |
The total energy line lies over the centre line of the pipe by an amount equal to |
| A. |
pressure head | | B. |
velocity head | | C. |
pressure head + velocity head | | D. |
pressure head - velocity head |
Answer: Option C
Explanation:
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| 38. |
A piezometer tube is used only for measuring |
| A. |
low pressure | | B. |
high pressure | | C. |
moderate pressure | | D. |
vacuum pressure |
Answer: Option C
Explanation:
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| 39. |
The flow in a pipe is turbulent when Reynold number is |
| A. |
less than 2000 | | B. |
between 2000 and 2800 | | C. |
more than 2800 | | D. |
none of these |
Answer: Option C
Explanation:
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| 40. |
When a tank containing liquid moves with an acceleration in the horizontal direction, then the free surface of the liquid |
| A. |
remains horizontal | | B. |
becomes curved | | C. |
falls on the front end | | D. |
falls on the back end |
Answer: Option C
Explanation:
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