Civil Engineering - Hydraulics

36. 

Most economical section of a triangular channel, is

A. equilateral triangle
B. right angled triangle
C. isosceles triangle with 45° vertex angle
D. right angled triangle with equal sides.

Answer: Option D

Explanation:

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37. 

In an open tube, free surface of mercury remains

A. horizontal
B. curved upwards
C. curved downwards
D. none of these.

Answer: Option C

Explanation:

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38. 

The equation for the viscosity, is suggested

A. Bernoulli
B. Newton
C. Chezy
D. Bezin
E. Helmholtz.

Answer: Option B

Explanation:

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39. 

The value of momentum correction factor (β) for a laminar flow through a circular pipe, is

A. 1/2
B. 2/3
C. 3/4
D. 4/3
E. 3/2

Answer: Option D

Explanation:

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40. 

Manometers are used to measure

A. pressure in water channels, pipes etc.
B. difference in pressure at two points
C. atmospheric pressure
D. very low pressure.

Answer: Option A

Explanation:

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