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Hydraulics & Fluid Mechanics

Hydraulics & Fluid Mechanics
Free surface of a liquid tends to contract to the smallest possible area due to force of

cohesion
viscosity
surface tension
friction

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Hydraulics & Fluid Mechanics
Two pipe systems are said to be equivalent when

length and diameter are same in two systems
friction factor and length are same in two systems
length of pipe and discharge are same in two systems
head loss and discharge are same in two systems

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Hydraulics & Fluid Mechanics
An object having 10 kg mass weighs 9.81kg on a spring balance. The value of ‘g’ at this place is

9.81 m/sec²
10.2/m sec
9.75 m/sec²
10m/sec²

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Hydraulics & Fluid Mechanics
The flow which neglects changes in a transverse direction is known as

turbulent flow
uniform flow
one dimensional flow
steady flow

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Hydraulics & Fluid Mechanics
The continuity equation pi V,A,= p2V2A2 is based on the following assumption regarding flow of fluid (where pi and p2 are mass densities.)

steady flow
frictionless flow
uniform flow
incompressible flow

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Hydraulics & Fluid Mechanics
The position of center of pressure on a plane surface immersed vertically in a static mass of fluid is

at the centroid of the submerged area
always below the centroid of the area
None of these
always above the centroid of the area

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