650 Important Hydraulics And Fluid Mechanics MCQ Question and Answer | PDF Free Download
1.If a body floating in a liquid occupies a new position and remains at rest in this new position, when given a small angular displacement, the body is said to be in __________ equilibrium.
- ANeutral
- BStable
- CUnstable
- DNone of these
2.If a body floating in a liquid occupies a new position and remains at rest in this new position, when given a small angular displacement, the body is said to be in __________ equilibrium.
- ANeutral
- BStable
- CUnstable
- DNone of these
3.A flow through a long pipe at decreasing rate is called __________ uniform flow.
- ASteady
- BUnsteady
- CBoth A and B
- DNone of these
4.The surface tension of mercury at normal temperature is __________ that of water.
- ASame as
- BLower than
- CHigher than
- DNone of these
5.For 450 m head of water, _________ shall be used.
- APelton wheel
- BKaplan turbine
- CFrancis turbine
- DNone of these
6.The factional resistance of a pipe varies approximately with __________ of the liquid.
- APressure
- BVelocity
- CSquare of velocity
- DCube of velocity
7.When a tank containing liquid moves with an acceleration in the horizontal direction, then the free surface of the liquid
- ARemains horizontal
- BBecomes curved
- CFalls on the front end
- DFalls on the back end
8.The pressure of air __________ with the increase of height from the surface of the earth.
- ADoes not change
- BDecreases
- CIncreases
- DNone of these
9.A perfect gas
- AHas constant viscosity
- BHas zero viscosity
- CIs in compressible
- DNone of the above
10.A Pelton wheel is
- ATangential flow impulse turbine
- BInward flow impulse turbine
- COutward flow impulse turbine
- DInward flow reaction turbine
11.The cavitation in reaction turbines is avoided, to a great extent by
- AInstalling the turbine below the tail race level
- BUsing stainless steel runner of the turbine
- CProviding highly polished blades to the runner
- DAll of the above
12.The highest efficiency is obtained with a channel of __________ section.
- ACircular
- BSquare
- CRectangular
- DTrapezoidal
13.When the Venturimeter is inclined, then for a given flow it will show __________ reading.
- ASame
- BMore
- CLess
- DNone of these
14.A notch is used to measure __________ of liquids.
- APressure
- BDischarge
- CVelocity
- DVolume
15.Re-entrant or Borda's mouthpiece is an __________ mouthpiece.
- AInternal
- BExternal
- CBoth A and B
- DNone of these
16.The ratio of actual work available at the turbine to the energy imparted to the wheel is known as ________ efficiency.
- AHydraulic
- BMechanical
- COverall
- DNone of these
17.When a cylindrical vessel containing liquid is resolved, the surface of the liquid takes the shape of
- AA triangle
- BA paraboloid
- CAn ellipse
- DNone of these
20.A turbine pump is basically a centrifugal pump equipped additionally with
- AAdjustable blades
- BBackward curved blades
- CVaned diffusion casing
- DInlet guide blades