HYDRAULICS & FLUID MECHANICS QUIZ

SURFACE TENSION HAS THE UNITS OF

NEWTONS

NETON/M

NEWTONS/M

NEW TONS/M

TRUE ANSWER : ?
YOUR ANSWER : ?

When a body floating in a liquid, is displaced slightly, it oscillates about

metacentre

center of pressure

e.g. of body

center of buoyancy

TRUE ANSWER : ?
YOUR ANSWER : ?

A large Roynold number is indication of

LAMINAR FLOW

highly turbulent flow.

turbulent flow

smooth and streamline flow

TRUE ANSWER : ?
YOUR ANSWER : ?

Choose the wrong statement

fluids are capable of flowing

when in equilibrium, fluids cannot sustain tangential forces

when in equilibrium, fluids can sustain shear forces

fluids conform to the shape of the con-taining vessels

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is demensionless

specific gravity

specific speed

specific weight

specific volume

TRUE ANSWER : ?
YOUR ANSWER : ?

The region between the separation streamline and the boundary surface of the solid body is known as

boundary layer

wake

drag

lift

TRUE ANSWER : ?
YOUR ANSWER : ?

According to Bernoulli’s equation for steady ideal fluid flow

total energy is constant throughout

the energy is constant along a stream-line but may vary across streamlines

principle of conservation of mass holds

velocity and pressure are inversely proportional

TRUE ANSWER : ?
YOUR ANSWER : ?

For a sphere of radius 15 cm moving with a uniform velocity of 2 m/sec through a liquid of specific gravity 0.9 and dynamic viscosity 0.8 poise, the Reynolds number will be

337.5

300

600

675

TRUE ANSWER : ?
YOUR ANSWER : ?

For a floating body to be in equilibrium

All of these

a righting couple should be formed

meta center should be above e.g.

center of buoyancy and e.g. must lie on same vertical plane

TRUE ANSWER : ?
YOUR ANSWER : ?

THEE HORIZONTAL COMPONENT OF BUOYANT FORCE IS

NEGLIGIBLE

ZERO

SAME AS BUOYANT FORCE

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?