8.1. Fluid is a substance that
(a) cannot be subjected to shear forces
(b) always expands until it fills any con-tainer
(c) has the same shear stress.at a point regardless of its motion
(d) cannot remain at rest under action of any shear force
Ans: d8.2. Fluid is a substance which offers no resistance to change of
Ans: c8.3. Practical fluids
(a) are viscous
(b) possess surface tension
(c) are compressible
(d) possess all the above properties
(e) possess none of the above properties.
Ans: d8.4. In a static fluid
(a) resistance to shear stress is small
(b) fluid pressure is zero
(c) linear deformation is small
(d) only normal stresses can exist
(e) viscosity is nil.
Ans: d8.5. A fluid is said to be ideal, if it is
(c) viscous and incompressible
(d) inviscous and compressible
(e) inviscous and incompressible.
8.6. An ideal flow of any fluid must fulfill the following
(a) Newton's law of motion
(b) Newton's law of viscosity
(c) Pascal' law
(d) Continuity equation
(e) Boundary layer theory.
8.7. If no resistance is encountered by displacement, such a substance is known as
(d) perfect solid
(e) ideal fluid.
8.8. The volumetric change of the fluid caused by a resistance is known as
(a) volumetric strain
(b) volumetric index
(a) cannot be compressed
(b) occupy definite volume
(c) are not affected by change in pressure and temperature
(GO are not viscous
(e) none of the above.
8.10. Density of water is maximum at
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