The major loss of energy in long pipes is due to_______________?

A. Sudden enlargement
B. Sudden contraction
C. Gradual contraction or enlargement
D. Friction

Which of the following has highest coefficient of discharge ?

A. Sharp edged orifice
B. Venturimeter
C. Borda’s mouthpiece running full
D. Cipouetti weir

The discharge over a broad crested weir is maximum when the depth of flow is_______________?

A. H/3
B. H/2
C. 2 h/5
D. 2 h/3

For a sphere of radius 15 cm moving with a uniform velocity of 2 m/sec through a liquid of specific gravity 0.9 and dynamic viscosity 0.8 poise, the Reynolds number will be_________________?

A. 300
B. 337.5
C. 600
D. 675

If x is the distance from leading edge, then the boundary layer thickness in laminar flow varies as________________?

A. X
B. X
C. X
D. X/7

The depth ‘d’ below the free surface at which the point velocity is equal to the average velocity of flow for a uniform laminar flow with a free surface, will be_________________?

A. 0.423 d
B. 0.577 d
C. 0.223 d
D. 0.707 d

In case of an airfoil, the separation of flow occurs________________?

A. At the extreme rear of body
B. At the extreme front of body
C. Midway between rear and front of body
D. Any where between rear and front of body depending upon reynolds number

The distance y from pipe boundary, at which the point velocity is equal to average velocity for turbulent flow, is________________?

A. 0.223 r
B. 0.423 r
C. 0.577 r
D. 0.707 r

With the same cross-sectional area and immersed in same turbulent flow, the largest total drag will be on__________________?

A. A circular disc of plate held normal to flow
B. A sphere
C. A cylinder
D. A streamlined body

For hydro-dynamically smooth boundary, the friction coefficient for turbulent flow is_______________?

A. Constant
B. Dependent only on reynolds number
C. A function of reynolds number and relative roughness
D. Dependent on relative roughness only