Centre of buoyancy always

Hydraulics and Fluid Mechanics in ME
Centre of buoyancy always

coincides with the centroid of the volume of fluid displaced

remains below the centre of gravity

remains above the centre of gravity

coincides with the centre of gravity

coincides with the centroid of the volume of fluid displaced

remains below the centre of gravity

remains above the centre of gravity

coincides with the centre of gravity

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Hydraulics and Fluid Mechanics in ME
The power absorbed (in watts) in overcoming the viscous resistance of a footstep bearing is

μ π³ N² R⁴ /3600 t

μ π³ N² R² /1800 t

μ π³ N² R² /3600 t

μ π³ N² R⁴ /1800 t

μ π³ N² R⁴ /3600 t

μ π³ N² R² /1800 t

μ π³ N² R² /3600 t

μ π³ N² R⁴ /1800 t

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Hydraulics and Fluid Mechanics in ME
The length AB of a pipe ABC in which the liquid is flowing has diameter (d1) and is suddenly contracted to diameter (d2) at B which is constant for the length BC. The loss of head due to sudden contraction, assuming coefficient of contraction as 0.62, is

0.375 v₂²/2g

0.5 v₁²/2g

v₁²/2g

v₂²/2g

0.375 v₂²/2g

0.5 v₁²/2g

v₁²/2g

v₂²/2g

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Hydraulics and Fluid Mechanics in ME
Manometric head, in case of a centrifugal pump, is equal to

Energy per kN at outlet of impeller Energy per kN at inlet of impeller

Suction lift + Loss of head in suction pipe due to friction + Delivery lift + Loss of head in delivery pipe due to friction + Velocity head in the delivery pipe

Work-done per kN of water Losses within the impeller

All of these

Energy per kN at outlet of impeller Energy per kN at inlet of impeller

Suction lift + Loss of head in suction pipe due to friction + Delivery lift + Loss of head in delivery pipe due to friction + Velocity head in the delivery pipe

Work-done per kN of water Losses within the impeller

All of these

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Hydraulics and Fluid Mechanics in ME
A large Reynold number is indication of

Steady flow

Laminar flow

Smooth and streamline flow

Highly turbulent flow

Steady flow

Laminar flow

Smooth and streamline flow

Highly turbulent flow

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Hydraulics and Fluid Mechanics in ME
A turbine is required to develop 1500 kW at 300 r.p.m. under a head of 150 m. Which of the following turbine should be used?

Kaplan turbine

Pelton wheel with one nozzle

Pelton wheel with two or more nozzles

Francis turbine

Kaplan turbine

Pelton wheel with one nozzle

Pelton wheel with two or more nozzles

Francis turbine

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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME Centre of buoyancy always

Hydraulics and Fluid Mechanics in ME The power absorbed (in watts) in overcoming the viscous resistance of a footstep bearing is

Hydraulics and Fluid Mechanics in ME The length AB of a pipe ABC in which the liquid is flowing has diameter (d1) and is suddenly contracted to diameter (d2) at B which is constant for the length BC. The loss of head due to sudden contraction, assuming coefficient of contraction as 0.62, is

Hydraulics and Fluid Mechanics in ME Manometric head, in case of a centrifugal pump, is equal to

Hydraulics and Fluid Mechanics in ME A large Reynold number is indication of

Hydraulics and Fluid Mechanics in ME A turbine is required to develop 1500 kW at 300 r.p.m. under a head of 150 m. Which of the following turbine should be used?

Hydraulics and Fluid Mechanics in ME
Centre of buoyancy always

Hydraulics and Fluid Mechanics in ME
The power absorbed (in watts) in overcoming the viscous resistance of a footstep bearing is

Hydraulics and Fluid Mechanics in ME
The length AB of a pipe ABC in which the liquid is flowing has diameter (d1) and is suddenly contracted to diameter (d2) at B which is constant for the length BC. The loss of head due to sudden contraction, assuming coefficient of contraction as 0.62, is

Hydraulics and Fluid Mechanics in ME
Manometric head, in case of a centrifugal pump, is equal to

Hydraulics and Fluid Mechanics in ME
A large Reynold number is indication of

Hydraulics and Fluid Mechanics in ME
A turbine is required to develop 1500 kW at 300 r.p.m. under a head of 150 m. Which of the following turbine should be used?