Fluid Mechanics and Hydraulic Machinery Mid - I, September - 2014

1.Viscosity of liquids increases with _______ in fluid temperature.
  • Increases
  • Decreases
  • Remains Constant
  • A & B
Answer: A
2.Poise is the unit of _____
  • Mass Density
  • Velocity gradient
  • Dynamic viscosity
  • Kinematic viscosity
Answer: C
3.The study of fluid motion involving the consideration of forces and energies causing the flow of fluid is known as _____
  • Kinetics of fluid flow
  • Dynamics of fluid flow
  • Kinematics of fluid flow
  • None of these
Answer: B
4.Orifice meter is used to measure _________
  • Flow rate
  • Discharge
  • Velocity
  • All the above
Answer: B
5.One stroke =____ cm2/sec
  • 1
  • 3
  • 2
  • 4
Answer: A
6.Accelerated velocity occurs when stream lines are
  • Converging
  • diverging
  • parallel
  • None
Answer: A
7.The equation of continuity of flow is based on the principal of law of conservation of
  • Energy
  • Mass
  • Momentum
  • None of the above
Answer: B
8.Atmospheric pressure held in terms of water column is
  • 7.5m
  • 8.5m
  • 9.81m
  • 10.30m
Answer: D
9.An ideal fluid is one which
  • Is compressible
  • Has negligible surface tension
  • Is incompressible
  • Is non-viscous and incompressible
Answer: D
10.Pitot tube is used for measurement of
  • Pressure
  • Flow
  • velocity at a point
  • Discharge
Answer: C
11.Newtonian fluid is defined as the fluid which --------------------------------
Answer: Obeys Newton’s law of Viscosity
12.For a liquid droplet, the internal pressure in excess of outside pressure is given by -------
Answer: p = 4 / d
13.If the fluid particle moves in a zig-zag way, the flow is called _____
Answer: Turbulent
14.For maximum efficiency of a single moving curved vane, the vane speed is ---------------
Answer: υ = v/2
15.Viscosity of liquids _________ with increase in fluid temperature.
Answer: Increases
16.Kinematic viscosity is defined as _______________
Answer: Ration of absolute viscosity to density of liquid
17.Bernoulli’s equation is derived making assumption that the flow is _________________________
Answer: Steady, non-viscous, incompressible & irretational
18.The force exerted by a jet of water on a stationary curved plate in the direction of jet is equal to______________
Answer: AV2(1 + cos )
19.Venturimeter is device used for measuring _____________________
Answer: Flow rate
20.Absolute gauge pressure is equal to ______________________
Answer: Atmosphere pressure + Gauge pressure