Fluid Mechanics and Hydraulic Machines Lab Mid - I, September - 2014

1.A real fluid any fluid which as
  • compressible
  • in compressible
  • surface tension & in compressible
  • surface tension & compressible
Answer: C
2.dynamic viscosity units
  • N-s/m2
  • kg-m/s
  • N-s/m
  • N-s2 /m
Answer: A
3.The velocity at given point varies with the time.
  • uniform flow
  • steady flow
  • unsteady flow
  • non uniform flow
Answer: C
4.stream line, streak line & path line's are identical in case of
  • steady flow
  • un steady flow
  • compressible flow
  • rotational flow
Answer: A
5.which of the following equations is known as momentum principle [
  • F= d(m2v)/dt
  • F = dv/dt
  • F = d(mv)/dt
  • none
Answer: C
6.which is the ratio of inertia force viscous force
  • froude's num
  • weber's num
  • reynolds num
  • mach number
Answer: C
7.in case of laminar flow loss of pressure head is proportional to
  • velocity
  • squre of velocity
  • velocity3
  • none of above
Answer: A
8.The flow in town water supply pipes is generally
  • laminar
  • turbulent
  • transition
  • any of the above
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
  • ρav
  • ρa(v-u)2
  • ρav /2
  • ρa(v-u)3
Answer: B
10.The efficiency of jet propulsion with inlet orifices at right angles to the direction of motion of ship is given by
  • 2u/V+u
  • 2u/V+2u
  • 2vu/(V+u)2
  • none
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