85.  Energy equation is usually applicable to
A. non-uniform flow
B. turbulent flow
C. laminar flow
D. steady flow.

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86.  The differential equation dplp + gdz + vdv =0 for a fluid motion is suggested by
A. Bernoulli
B. Cauchy-Riemann
C. Laplace
D. Leonhard Euler.

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87.  Bernoulli's equation assumes that
A. fluid is non-viscous
B. fluid is homogeneous
C. flow is steady
D. all the above.

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88.  Which one of the following statements is true ?
A. The value of kinetic energy correction factor for turbulent flow lies between 1.03 to 1.06
B. The value of kinetic energy correction factor for laminar flow is 2
C. The practical value of kinetic energy correction factor for turbulent flow is unity
D. all the above.

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89.  The line joining the points to which the liquid rises in vertical piezometer tubes fitted at different cross-sections of a conduit, is known as
A. hydraulic gradient
B. piezometric line
C. pressure grade line
D. all the above.

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90.  Hydraulic grade line
A. remains above the centre line of conduit
B. remains below the centre line of conduit
C. remains parallel to the centre line of conduit
D. may be above or below the centre line of conduit.

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91.  Pick up the correct statement from the following :
A. Total energy gradient is the graphical representation of the total head at any section of a pipe line
B. Vertical distance between the total energy line and hydraulic grade line is equal to the velocity head
C. Vertical distance between the total energy line and total energy gradient represents loss of head
D. all the above.

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