Engineering :: Fluid Mechanics and Hydraulic Machines

@ : Home > Mechanical Engineering > Fluid Mechanics and Hydraulic Machines

101.

Buoyant force is

A.	The resultant force on a body due to the fluid surrounding it	B.	The resultant force acting on a floating body
C.	The force necessary to maintain equilibrium of a submerged body	D.	A non-vertical force on symmetrical bodies
E.	Equal to the volume of liquid displaced

102.

A piece of metal weights 10 kg in air and 8 kg in water. The specific gravity of the metal is

103.

A piezometer is not used for pressure measurement in pipes when

A.	The pressure is very low	B.	The pressure drop in the pipe is low
C.	Velocity of fluid is high	D.	Velocity of fluid is low
E.	The fluid in the pipe is a gas

104.

The centre of pressure on an immersed surface is

A.	At the cantre of gravity	B.	Above the centre of gravity
C.	Below the centre of gravity	D.	Depends on the viscosity of fluid
E.	Depends on the density of fluid

105.

The angle of divergence for the divergent cone of a venturimeter which will give most efficient conversion of kinetic energy is about

106.

The assumptions made in the most familiar form of Bernoulli's equation is that

A.	Flow is along the streamlines	B.	Flow is steady
C.	Fluid is non-viscous	D.	Fluid is homogeneous
E.	All the above

107.

In a venturimeter

A.	Length of divergent cone is equal to the length of conergent cone	B.	Length of divergent cone is half that of convergent cone
C.	Divergent cone is kept shorter than convergent cone	D.	Divergent cone is kept longer than the convergent cone
E.	None of the above

108.

Pascal's law states that pressure at a point is equal in all directions

A.	In a liquid at rest	B.	In a fluid at rest
C.	In a laminar flow	D.	In a turbulent flow

109.

The turbulent flow is hydraulically smooth if the ratio height of roughness projection/the thickness of laminar sub-layer is less than

110.

The flow in a pipe is laminar if the Reynolds number is