Mea Engineering College: Department of Civil Erngineering Fluid Mechanics-I
Mea Engineering College: Department of Civil Erngineering Fluid Mechanics-I
Mea Engineering College: Department of Civil Erngineering Fluid Mechanics-I
𝐶
(c) 𝐶𝑑 = 𝐶𝑐 (d) none of the above
𝑣
16. The rate of flow of a V-notch varies as
(a) H (b) H1/2
(c) H3/2 (d) H5/2
17.Weir is a device used for measuring
(a) the rate of flow through pipes
(b) the rate of flow through a small channel
(c) velocity through pipe
(d) velocity through a small channel
18.Orifices are used to measure
(a) velocity (b) pressure
(c) viscosity (d) discharge
19. Francis formula for a rectangular weir with end contraction is
(a) Q = 1.84 LH5/2 (b) Q = (2/3) LH3/2
(c) Q = 1.84 LH3/2 (d) Q = (2/3) LH5/2
20. Cipolletti weir has a side slope of
(a) 1 horizontal to 2 vertical (b) 4 horizontal to 1 vertical
(c) 1 horizontal to 4 vertical (d) 1 horizontal to 3 vertical
21. The flow in a pipe is laminar if Reynolds number is
(a) equal to 2500 (b) equal to 4000
(c) more than 2500 (d) none of the above
22.The value of the kinetic energy correction factor (α) of the viscous flow through the circular
pipe is
(a)1.33 (b)1.5
(c)2 (d)1.25
23. The coefficient of friction for laminar flow through circular pipes is given by
0.0791 16
(a) 𝑓 = (𝑅𝑒)1/4 (b) 𝑓 = 𝑅𝑒
64
(c) 𝑓 = 𝑅𝑒 (d) none of the above
25.When the pipes are connected in series, the total rate of flow
(a) is equal to the sum of rate of flow in each pipe
(b) is equal to the reciprocal of the sum of rate of flow in each pipe
(c) is the same as flowing through each pipe
(d) none of the above
26.A boundary is known as hydrodynamically smooth if
𝑘 𝑘
(a) 𝛿′ = 0.3 (b) 𝛿′ > 0.3
𝑘 𝑘
(c) 𝛿′ < 0.25 (d) 𝛿′ = 6
ANSWER KEY-FM- I
1. (c) 2. (b) 3. (c) 4. (c) 5.(c) 6.(c) 7.(d) 8.(a) 9.(b) or (c) 10.(c) 11.(c) 12.(c) 13.(d) 14.(b) 15.(b)
16.(d) 17.(b) 18.(d) 19.(c) 20.(c) 21.(d) 22.(c) 23.(b) 24.(d) 25.(c) 26.(c) 27.(c) 28.(b) 29.(b)
30.(b)