HYDRAULICS AND FLUID MECHANICS IN ME QUIZ

A hydraulic intensifier normally consists of

Two cylinders, two rams and a storage device

Two coaxial rams and two cylinders

A cylinder, a piston, storage tank and control valve

A cylinder and a ram

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The major loss of energy in long pipes is due to

gradual contraction or enlargement

sudden contraction

friction

sudden enlargement

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The meatcentric height is the distance between the

Centre of gravity of the floating body and the metacentre

Metacentre and centre of buoyancy

Centre of gravity of the floating body and the centre of buoyancy

Original centre of buoyancy and new centre of buoyancy

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A square surface 3 m x 3 m lies in a vertical line in water pipe its upper edge at vater surface. The hydrostatic force on square surface is

27,000 kg

18,000 kg

13,500 kg

9,000 kg

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Which of the following turbine is preferred for a specific speed of 60 to 300 r.p.m.?

Kaplan turbine

None of these

Francis turbine

Pelton wheel

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A balloon lifting in air follows the following principle

law of gravitation

Archimedes principle

All of these

principle of buoyancy

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In an inward flow reaction turbine

The water enters the wheel at the outer periphery and then flows towards the center of the wheel

The water flows parallel to the axis of the wheel

The water enters at the center of the wheel and then flows towards the outer periphery of the wheel

The flow of water is partly radial and partly axial

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The velocity at which the flow changes from laminar flow to turbulent flow is called

Sub-sonic velocity

Velocity of approach

Super-sonic velocity

Critical velocity

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The flow in a pipe is neither laminar nor turbulent when Reynold number is

None of these

Less than 2000

Between 2000 and 2800

More than 2800

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A Pelton wheel is

Tangential flow impulse turbine

Inward flow impulse turbine

Inward flow reaction turbine

Outward flow impulse turbine

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