Fluid Mechanics and Hydraulic Machines Lab Mid - I, September - 2014
1.A real fluid any fluid which as
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compressible
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in compressible
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surface tension & in compressible
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surface tension & compressible
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Answer: C
2.dynamic viscosity units
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N-s/m2
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kg-m/s
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N-s/m
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N-s2 /m
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Answer: A
3.The velocity at given point varies with the time.
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uniform flow
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steady flow
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unsteady flow
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non uniform flow
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Answer: C
4.stream line, streak line & path line's are identical in case of
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steady flow
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un steady flow
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compressible flow
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rotational flow
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Answer: A
5.which of the following equations is known as momentum principle [
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F= d(m2v)/dt
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F = dv/dt
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F = d(mv)/dt
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none
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Answer: C
6.which is the ratio of inertia force viscous force
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froude's num
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weber's num
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reynolds num
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mach number
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Answer: C
7.in case of laminar flow loss of pressure head is proportional to
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velocity
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squre of velocity
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velocity3
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none of above
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Answer: A
8.The flow in town water supply pipes is generally
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laminar
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turbulent
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transition
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any of the above
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Answer: B
9.The force exerted by the jet of water on a moving verticle plate in the direction of motion of palte is given by
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ρav
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ρa(v-u)2
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ρav /2
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ρa(v-u)3
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Answer: B
10.The efficiency of jet propulsion with inlet orifices at right angles to the direction of motion of ship is given by
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2u/V+u
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2u/V+2u
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2vu/(V+u)2
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none
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Answer: B
11._________________ Possesses no definite volume and is compressible
Answer: gas
12.the viscosity of the liquids _____________with increse in temp.
Answer: decreses
13.the magnitude of the buoyant forces can be determined by ________________ principle
Answer: archimedes's
14.the path followed by fluid particle in the motion is called __________________
Answer: path line
15.if the flow is irrotational as well as steady it is known as ______________
Answer: potential flow
16.The piezometric head is the summation of _________________
Answer: pressure head and elevation head
17.The K.E correction factor for cicular pipe is equal to _________________
Answer: 2
18.darcy weisbach equation is _________________
Answer: ( h= flv2/2gd)
19.The force exerted by a jet of water on stationary verticle plate in the direction of jet is given by________
Answer: ρav2
20.for maximum efficiency of a series of curved vanes the speed is _____________
Answer: 1/2 of jet speed