in this presentation i have detailing about previous year questions of fluid transfer . i hope this presentation will be useful for your competitive exam preparation.

3. 1. Newton’s law of viscosity states that?
a) Shear stress is directly proportional to viscosity
b) Shear stress is directly proportional to velocity
c) Shear stress is directly proportional to shear strain
d) Shear stress is directly proportional to velocity gradient ( d )
2. The viscosity of liquids is decreased with increase temperature due to
a) Decrease in cohesive force
b) Increase in cohesive force
c) Decrease molecular momentum transfer
d) Increase molecular momentum transfer ( a)
3. The viscosity of water with respect to air is about
a) 65 times b) 60 times c) 50 times d) 55 times ( d )

4. 4. Calculate the specific weight of petrol with specific gravity of 0.7 ?
a) 7000
b) 6867
c) 9810
d) 7.8 ( b )
Specific gravity = 0.7
=(density of petrol / density of water)
Density of petrol = 0.7*1000= 700
Specific weight of petrol = 700 * 9.81 =6867
5. for dilatant non Newtonian fluid, the aperant viscosity
a) Increase with increasing deformation rate
b) Decrease with increasing deformation rate
c) Increase with decreasing deformation rate
d) Decrease with decreasing deformation rate ( b )

5. 6. A fluid in which resistance to deformation is independent of shear
stress is known as
a) Pseudo plastic fluid
b) Dilatant flow
c) Bingham fluid
d) Newtonian fluid ( d )
7. The loss of head due to sudden enlargement is attributed to
a) Viscosity of fluid
b) Generation of heat
c) Roughness of pipe
d) Production and dissipation of turbulent energy ( d)

6. 8. The Centre of pressure of a plane submerged surface
a) As a point on the submerged area at which the resultant hydrostatic
force is supposed to act
b) Should always coincide within the center of submerged area
c) Should be at the center of gravity of the plane surface
d) Is always below the centroid of area ( d )
9. A clean glass tube of 2 mm diameter contains water at 40 deg. The
capillary rises is approximately? (σ = 0.073 N/m)
a) 5mm
b) 10 mm
c) 15 mm
d) 20 mm ( c )

7. 10. Surface tension is due to?
a) Cohesion
b) Adhesion
c) Viscosity
d) Compressibility of fluid ( a )
11. Which property of mercury is the main reason for its use in
barometer?
a) High Density
b) Negligible capillarity effect
c) Very low vapour pressure
d) Low compressibility ( c )

8. 12. Pascal’s law states that pressure at a point is equal to all direction in a
a) Liquid at rest
b) Fluid at rest
c) Laminar flow
d) Turbulent flow
( b)
13. The centre of pressure of a plane submerged surface
a) Is a point on the submerged area at which the resultant hydrostatic
force is supposed to act
b) Should always coincide within the centre of submerged area
c) Should be at the centre of gravity of the plane surface
d) Is always below the centroid of area ( d )

9. 14. For irrotational flow, the velocity potential lines and the streamlines
are always
a) Parallel to each other
b) Coplanar
c) Orthogonal to each other
d) Inclined to the horizon (c )
15. A steady irrotational flow of an incompressible fluid is called
a) Streamline flow
b) Creeping flow
c) Shear flow
d) Potential flow
( d )

10. 16. McLeod gauges are used to measuring
a) RPM of shaft
b) Surface roughness
c) Vacuum
d) Velocity ( c )
17. For an inclined plan at which position
Maximum total pressure acts on it?
a) Horizontal
b) Vertical
c) Inclined
d) None of the above ( b )

11. 18. The centre of Buoyancy is
a) Centroid of displaced volume of liquid
b) A point slight above the metacenter
c) Centre of gravity of body
d) All the above ( a )
19. Local acceleration in fluid is due to
a) Unsteady nature of fluid
b) non uniformity flow of fluid
c) Turbulence in fluid
d) Irrotational flow in fluid ( a )

12. 20. A streamline body is defined as a body about which
a) The drag is zero
b) The flow is laminar
c) The flow is along the streamline
d) The flow separation is suppressed
( d )