RRB JE-Mechanical Engineering Solved Paper-9
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1.
Fluid is a substance that
1
cannot be subjected to shear forces
2
always expands until it fills any con-tainer
3
has the same shear stress.at a point regardless of its motion
4
cannot remain at rest under action of any shear force
5
flows.
2.
Fluid is a substance which offers no resistance to change of
1
pressure
2
flow
3
shape
4
volume
5
temperature.
3.
Practical fluids
1
are viscous
2
possess surface tension
3
are compressible
4
possess all the above properties
5
possess none of the above properties.
4.
In a static fluid
1
resistance to shear stress is small
2
fluid pressure is zero
3
linear deformation is small
4
only normal stresses can exist
5
viscosity is nil.
5.
A fluid is said to be ideal, if it is
1
incompressible
2
inviscous
3
viscous and incompressible
4
inviscous and compressible
5
inviscous and incompressible.
6.
An ideal flow of any fluid must fulfill the following
1
Newton's law of motion
2
Newton's law of viscosity
3
Pascal' law
4
Continuity equation
5
Boundary layer theory.
7.
If no resistance is encountered by displacement, such a substance is known as
1
fluid
2
water
3
gas
4
perfect solid
5
ideal fluid
8.
The volumetric change of the fluid caused by a resistance is known as
1
volumetric strain
2
volumetric index
3
compressibility
4
adhesion
5
cohesion.
9.
Liquids
1
cannot be compressed
2
occupy definite volume
3
are not affected by change in pressure and temperature
4
GO are not viscous
5
none of the above.
10.
Density of water is maximum at
1
0
2
0
3
4
4
100
5
20
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