Fluid Mechanics - Practice Test

[#391] Pick out the correct statement pertaining to venturimeter.

(A) A venturimeter with a fixed pressure drop discharges more, when the flow is vertically downward, than when the flow is vertically upward

(B) The co-efficient of contraction of a venturimeter is always unity

(C) For a fixed pressure drop, the discharge of a gas through a venturimeter is greater, when compressibility is taken into account, than when it is neglected

(D) None of these

Correct Answer

(D) None of these

[#392] With increase in the ratio of orifice diameter to pipe diameter, the fraction of the orifice pressure differential that is permanently lost

(A) Increases

(B) Decreases

(C) Remains unchanged

(D) Increases exponentially

Correct Answer

(B) Decreases

[#393] Self-priming centrifugal pump can be used for

(A) Booster service

(B) Pumping liquid fertilisers (e.g. liquid NH 3 )

(C) Pumping industrial wastes

(D) All of the above

Correct Answer

(D) All of the above

[#394] For laminar flow of Newtonion fluids through a circular pipe, for a given pressure drop and length & diameter of pipe, the velocity of fluid is proportional to (where, $$mu $$ = fluid viscosity)

(A) $$mu $$

(B) $$frac{1}{mu }$$

(C) $$sqrt mu $$

(D) $$frac{1}{{sqrt mu }}$$

Correct Answer

(B) $$frac{1}{mu }$$

[#395] In an incompressible flow of fluid, the fluid

(A) Temperature remains constant

(B) Compressibility is greater than zero

(C) Density does not change with pressure & temperature

(D) Is frictionless

Correct Answer

(C) Density does not change with pressure & temperature

Fluid Mechanics - Study Mode

[#391] Pick out the correct statement pertaining to venturimeter.

Correct Answer

[#392] With increase in the ratio of orifice diameter to pipe diameter, the fraction of the orifice pressure differential that is permanently lost

Correct Answer

[#393] Self-priming centrifugal pump can be used for

Correct Answer

[#394] For laminar flow of Newtonion fluids through a circular pipe, for a given pressure drop and length & diameter of pipe, the velocity of fluid is proportional to (where, $$mu $$ = fluid viscosity)

Correct Answer

[#395] In an incompressible flow of fluid, the fluid

Correct Answer