HYDRAULICS AND FLUID MECHANICS IN ME QUIZ

According to Bazin's formula, the discharge over a rectangular weir is mL2g x H3/2 where m is equal to

0.003 + (0.405/H)

0.003 + (H/0.405)

0.405 + (0.003/H)

0.405 + (H/0.003)

TRUE ANSWER : ?
YOUR ANSWER : ?

A centrifugal pump will start delivering liquid only when the pressure rise in the impeller is equal to the

Velocity head

Manometric head

Kinetic head

Static head

TRUE ANSWER : ?
YOUR ANSWER : ?

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

mi × √(A × C)

C × √(m × i)

AC × √(m × i)

A × √(m × i)

TRUE ANSWER : ?
YOUR ANSWER : ?

The discharge of a depressed nappe is 6 to 7 percent __________ that of a free nappe.

None of these

Equal to

Less than

More than

TRUE ANSWER : ?
YOUR ANSWER : ?

For pipes, laminar flow occurs when Reynolds number is

Less than 2000

Between 2000 and 4000

More than 4000

Less than 4000

TRUE ANSWER : ?
YOUR ANSWER : ?

The factional resistance of a pipe varies approximately with __________ of the liquid.

Velocity

Pressure

Square of velocity

Cube of velocity

TRUE ANSWER : ?
YOUR ANSWER : ?

For hypersonic flow, the Mach number is

greater than 4

unity

greater than unity

greater than 2

TRUE ANSWER : ?
YOUR ANSWER : ?

To avoid an interruption in the flow of a siphon, an air vessel is provided

At the summit

At the inlet

At the outlet

At any point between inlet and outlet

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following statement is correct as regard to water wheels?

They are suitable even for low water heads

All of these

They give constant efficiency, even if the discharge is not constant

They have slow speeds

TRUE ANSWER : ?
YOUR ANSWER : ?

The depth of the centre of pressure on a vertical rectangular gate 8 m wide and 6 m high, when the water surface coincides with the top of the gate, is

3.0 m

2.4 m

5.0 m

4.0 m

TRUE ANSWER : ?
YOUR ANSWER : ?

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