# Hydraulics and Fluid Mechanics MCQ

## Q. 11 The velocity of the liquid flowing through the divergent portion of a Venturimeter

A. Decreases

B. Depends upon mass of liquid

D. Increases

C. Remains constant

A. Decreases

## Q. 12 The volumetric change of the fluid caused by a resistance is known as

A. Volumetric index

B. Compressibility

C. Volumetric strain

B. Compressibility

## Q. 13 If the depth of water in an open channel is less than the critical depth, the flow is called

A. Torrential flow

B. Critical flow

C. Turbulent flow

D. Tranquil flow

A. Torrential flow

## Q. 14 Choose the wrong statement

A. Fluids conform to the shape of the containing vessels

B. When in equilibrium, fluids can sustain shear

C. Fluids are capable of flowing

D. When in equilibrium, fluids cannot sustain tangential forces

B. When in equilibrium, fluids can sustain shear

## Q. 15 An orifice is said to be large, if

A. The available head of liquid is more than 5 times the height of orifice

B. The available head of liquid is less than 5 times the height of

C. The size of orifice is large

D. The velocity of flow is large

B. Fat lime

## Q. 16 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?

A. The metal piece will be immersed in mercury by half

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

C. The metal piece will simply float over the mercury

D. Metal piece will sink to the bottom

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

A. Below

B. At

C. Above

D. None of these

A. Below

## Q. 18 Dynamic viscosity of most of the liquids with rise in temperature

A. Remain unaffected

B. Unpredictable

C. Increases

D. Decreases

D. Decreases

## Q. 19 The discharge over a right angled notch is (where H = Height of liquid above the apex of notch)

A. (8/15) Cd. 2g. H2

B. (8/15) Cd. 2g. H3/2

C. (8/15) Cd. 2g. H5

D. (8/15) Cd. 2g. H5/2

D. (8/15) Cd. 2g. H5/2

A. 18,000 kg

B. ) 27,000 kg

C. 9,000 kg

D. 13,500 kg

D. 13,500 kg