Hydraulics

Hydraulics

Multiple Choice

According to Chezy's formula, the discharge through an open channel is (where A = Area of flow, C = Chezy's constant, R = Hydraulic Radius, and S = Uniform slope in bed)

• A × √(R × S)

• C × √(R × S)

• AC × √(R × S)

• RS × √(A × C)

Multiple Choice

When the flow parameters at any given instant remain same at every point, then flow is said to be

• Quasi-static

• Steady state

• Laminar

• Uniform

Multiple Choice

A weir is said to be narrow-crested weir, if the width of the crest of the weir is __________ half the height of water above the weir crest.

• Equal to

• Less than

• More than

• Non of these

Multiple Choice

The mass of 2.5 m3 of a certain liquid is 2 tonnes. Its mass density is

• 200 kg/m³

• 400 kg/m³

• 600 kg/m³

• 800 kg/m³

Multiple Choice

The most economical section of a rectangular channel is one which has hydraulic mean depth or hydraulic radius equal to

• Half the depth

• Half the breadth

• Twice the depth

• Twice the breadth

Multiple Choice

The maximum discharge over a broad crested weir is

• 0.384 C_d × L × H^1/2

• 0.384 C_d × L × H^3/2

• 1.71 C_d × L × H^1/2

• 1.71 C_d × L × H^3/2

Multiple Choice

The most economical section of a trapezoidal channel is one which has hydraulic mean depth equal to

• 1/2 × depth

• 1/2 × breadth

• 1/2 × sloping side

• 1/4 × (depth + breadth)

Multiple Choice

The Cipoletti weir is a __________ weir.

• Rectangular

• Triangular

• Trapezoidal

• Circular

Multiple Choice

The discharge in an open channel corresponding to critical depth is

• Zero

• Minimum

• Maximum

• None of these

Multiple Choice

The discharge over a rectangular notch is

• Inversely proportional to H^3/2

• Directly proportional to H^3/2

• Inversely proportional to H^5/2

• Directly proportional to H^5/2

Multiple Choice

The total energy line lies over the hydraulic gradient line by an amount equal to the

• Pressure head

• Velocity head

• Pressure head + velocity head

• Pressure head - velocity head

Multiple Choice

In open channels, the specific energy is the

• Total energy per unit discharge

• Total energy measured with respect to the datum passing through the bottom of the channel

• Total energy measured above the horizontal datum

• Kinetic energy plotted above the free surface of water

Multiple Choice

The sheet of water flowing over a notch or a weir is known as

• Sill or crest

• Nappe or vein

• Orifice

• None of these

Multiple Choice

A notch is used to measure __________ of liquids.

• Pressure

• Discharge

• Velocity

• Volume