HYDRAULICS & FLUID MECHANICS QUIZ

Drag force is a function of i) projected area of the body ii) mass density of the fluid iii) velocity of the body The correct answer is

(i) and (ii)

(ii) and (iii)

(i) and (iii)

(i), (ii) and (iii)

TRUE ANSWER : ?
YOUR ANSWER : ?

The increase in meta centric height i) increases stability ii) decreases stability iii) increases comfort for passengers iv) decreases comfort for passengers The correct answer is

(ii) and (iv)

(i) and (iv)

(ii) and (iii)

(i) and (iii)

TRUE ANSWER : ?
YOUR ANSWER : ?

At the centre line of a pipe flowing under pressure where the velocity gradient is zero, the shear stress will be

minimum

could be any value

maximum

negative value

TRUE ANSWER : ?
YOUR ANSWER : ?

Fluid is a substance that

cannot be subjected to shear forces

has the same shear stress.at a point regardless of its motion

cannot remain at rest under action of any shear force

always expands until it fills any container

TRUE ANSWER : ?
YOUR ANSWER : ?

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

lift

drag

wake

boundary layer

TRUE ANSWER : ?
YOUR ANSWER : ?

Coefficient of velocity for Borda’s mouth piece running full is

0.611

0.855

0.707

1.00

TRUE ANSWER : ?
YOUR ANSWER : ?

The difference of pressure between the inside and outside of a liquid drop is

(a)p = Txr

p = T/2r

(d)p = 2T/r

(b)p = T/r

TRUE ANSWER : ?
YOUR ANSWER : ?

The resultant of all normal pressures acts

at center of pressure

vertically upwards

at metacentre

at e.g. of body

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following instrument can be used for measuring speed of an aeroplane

pitot tube

Venturimeter

rotameter

Orifice plate

TRUE ANSWER : ?
YOUR ANSWER : ?

Operation of McLeod gauge used for low pressure measurement is based on the principle of

gas law

Pascal’s law

Boyle’s law

Charle’s law

TRUE ANSWER : ?
YOUR ANSWER : ?

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