Fluid Mechanics for Chemical

A. Surface tension of a liquid is because of the difference in magnitude of adhesive & cohesive
forces
B. A hydrometer used for the determination of specific gravities of liquids works on the principle
of buoyant forces
C. In case of unsteady fluid flow, the velocity at any given point does not change with time
D. Turbulent fluid flow is characterised by the rapid fluctuation of instantaneous pressure &
velocity at a point

A. A fluid mass is free from shearing forces, when it is made to rotate with a uniform velocity
B. Newton’s law of viscosity is not applicable to the turbulent flow of fluid with linear velocity
distribution
C. Laminar flow of viscous liquids is involved in the lubrication of various types of bearings
D. Rise of water in capillary tubes reduces with the increasing diameter of capillary tubes

A. The eddy viscosity is a function of the type of turbulence involved
B. The eddy viscosity is a fluid property
C. The viscosity of gas increases with increase in temperature
D. The viscosity of a liquid increases with decrease in temperature

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

A. Human blood is a Newtonian fluid
B. A Newtonian fluid obeys Newton’s law of cooling
C. For a non-Newtonian fluid, a straight line passes through the origin in a plot between shear
stress and shear gradient
D. Thin lubricating oil is an example of a non-Newtonian fluid

A. It is always parallel to the main direction of the fluid flow
B. It is a line across which there is no flow and it is equivalent to a rigid boundary
C. Streamlines intersect at isolated point of zero velocity and infinite velocity
D. The fluid lying between any two streamlines can be considered to be in isolation and the
streamline spacing varies inversely as the velocity

A. The form drag is dependent upon the occurrence of a wake
B. The shear stress at any given cross-section of a pipe for steady flow (either laminar or turbulent) varies linearly as the radial distance
C. An ideal fluid is the one, which has negligible surface tension and obeys the Newton’s law of viscosity
D. Existence of the boundary layer in fluid flow is because of viscosity of the fluid.

A. Greater is the kinematic viscosity of the liquid, greater is the thickness of the boundary layer
B. Blowers develop a maximum pressure of 2 atmospheres
C. Friction losses in pipe fittings are generally expressed in terms of velocity heads
D. Fanning friction factor in case of turbulent flow of liquids in pipe depends upon relative
roughness & Reynolds number

A. For frictionless flow, the fluid pressure entering the venturi meter will be exactly equal to that
leaving the Venturimeter
B. Discharge of fluid through a Venturimeter depends upon the gage difference irrespective of
the orientation of Venturimeter
C. Venturimeter occupies less space than an orificemeter
D. Venturimeter incurs less power loss compared to an equivalent orificemeter

A. The discharge through a Venturimeter depends upon Δp only and is independent of
orientation of the meter
B. A Venturimeter with a given gage difference discharges at a greater rate, when the flow is
vertically downward through it, than when the flow is vertically upward
C. For a given pressure difference, the discharge of gas is greater through a Venturimeter, when
compressibility is taken into account, than when it is neglected
D. The overall pressure loss is the same in a given pipe line, whether a Venturimeter or a nozzle
with the same throat dia is used