HYDRAULICS AND FLUID MECHANICS IN ME QUIZ

Metacentric height for small values of angle of heel is the distance between the

centre of gravity and centre of buoy-ancy

centre of buoyancy and metacentre

free surface and centre of buoyancy

centre of gravity and metacentre

TRUE ANSWER : ?
YOUR ANSWER : ?

A tank of uniform cross-sectional area (A) containing liquid upto height (H1) has an orifice of cross-sectional area (a) at its bottom. The time required to bring the liquid level from H1 to H2 will be

2A × √H₂/Cd × a × √(2g)

2A × √H₁/Cd × a × √(2g)

2A × (√H₁ - √H₂)/Cd × a × √(2g)

2A × (√H3/2 - √H3/2)/Cd × a × √(2g)

TRUE ANSWER : ?
YOUR ANSWER : ?

Kinematic similarity is said to exist between the model and the prototype, if both of them

Are equal in size and shape

Have identical forces

Are identical in shape, but differ only in size

Have identical velocities

TRUE ANSWER : ?
YOUR ANSWER : ?

The loss of pressure head in case of laminar flow is proportional to

(Velocity)2

(Velocity)3

Velocity

(Velocity)4

TRUE ANSWER : ?
YOUR ANSWER : ?

Fluid is a substance which offers no resistance to change of

Volume

Flow

Shape

Pressure

TRUE ANSWER : ?
YOUR ANSWER : ?

A jet of water discharging from a 40 mm diameter orifice has a diameter of 32 mm at its vena contracta. The coefficient of contraction is

0.78

0.64

0.46

0.87

TRUE ANSWER : ?
YOUR ANSWER : ?

A hemispherical tank of radius (R) has an orifice of cross-sectional area (a) at its bottom and is full of liquid. The time required to empty the tank completely is

14π R7/2/15Cd × a √(2g)

14π R5/2/15Cd × a √(2g)

14π R1/2/15Cd × a √(2g)

14π R3/2/15Cd × a √(2g)

TRUE ANSWER : ?
YOUR ANSWER : ?

Low specific speed of a pump implies it is

Mixed flow pump

Centrifugal pump

Axial flow pump

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

The wake

is a region of high pressure intensity

always occurs after a separation point

None of these

always occurs before a separation point

TRUE ANSWER : ?
YOUR ANSWER : ?

If the surface of liquid is convex, men

Cohesion pressure is negligible

Cohesion pressure is decreased

There is no cohesion pressure

Cohesion pressure is increased

TRUE ANSWER : ?
YOUR ANSWER : ?

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