HYDRAULICS AND FLUID MECHANICS IN ME QUIZ

The coefficient of discharge for an external mouthpiece is

0.855

0.375

0.5

0.707

TRUE ANSWER : ?
YOUR ANSWER : ?

The power transmitted through the nozzle is maximum when the head lost due to friction in the pipe is __________ of the total supply head.

None of these

One-third

Two-third

One-half

TRUE ANSWER : ?
YOUR ANSWER : ?

A piece of metal of specific gravity 13.6 is placed in mercury of specific gravity 13.6, what fraction of it volume is under mercury?

The metal piece will simply float over the mercury

Whole of the metal piece will be immersed with its top surface just at mercury level

Metal piece will sink to the bottom

The metal piece will be immersed in mercury by half

TRUE ANSWER : ?
YOUR ANSWER : ?

Rotameter is a device used to measure

velocity of fluid

flow

rotation

absolute pressure

TRUE ANSWER : ?
YOUR ANSWER : ?

The specific weight of water in S.I. units is taken as

9.81 × 10-6 N/mm3

9.81 kN/m3

9.81 × 103 N/m3

Any one of these

TRUE ANSWER : ?
YOUR ANSWER : ?

The conditions for the stable equilibrium of a floating body are

the center of buoyancy and the center of gravity must lie on the same vertical line

all the above are correct

a righting couple should be formed

the meta-center should lie above the center of gravity

TRUE ANSWER : ?
YOUR ANSWER : ?

When the coefficient of discharge (Cd) is 0.623, then the general equation for discharge over a rectangular weir is

1.84(L - nH)H3

1.84(L - 0.1nH)H5/2

1.84(L - nH)H2

1.84(L - 0.1nH)H3/2

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following pump is successfully used for lifting water to the boilers?

Jet pump

Airlift pump

Reciprocating pump

Centrifugal pump

TRUE ANSWER : ?
YOUR ANSWER : ?

The losses are more in

critical flow

laminar flow

turbulent flow

transition flow

TRUE ANSWER : ?
YOUR ANSWER : ?

The pressure of liquid at throat in a Venturimeter is __________ than that at inlet.

Lower

Higher

None of these

Same

TRUE ANSWER : ?
YOUR ANSWER : ?