Mercury is generally used in barometer because
A.Of higher density due to which the height of barmeter will be small
B.It has practically zero vapour pressure
C.It shines and can be easily read
D.It does not stick to the tube walls
E.All above
Category: Fluid Mechanics and Hydraulic Machines Mcqs
1 m of water column is equivalent to
A.0.1 kN/m2
B.1.0 kN/m2
C.10 kN/m2
D.100 kN/m2
E.1000 kN/m2
A hydro-electric site has a head of 100 m and an average discharge of 10m3/s. Assume 92% efficiency, for a greater speed of 6000 rpm, the specific speed of turbine would be
A.600
B.1000
C.1500
D.1900
E.None of the above
Type of impeller used in mud pumps is
A.Shrouded
B.One side shrouded
C.Open
D.Double suction
E.Any of the above
Pressure drag results from
A.Skin friction
B.Deformation drag
C.Development of a stagnation point
D.Occurrence of a wake
An ideal flow of any liquid must fulfil
A.Newton’s second law of motion
B.Bernulli’s theorem
C.The Newton’s law of viscosity
D.Law of conservation of energy
E.Countinuity equation
A Kaplan turbine is suitable for
A.High head low discharge
B.High head high discharge
C.Low head low discharge
D.Low head high discharge
E.None of the above
In a centrifugal pump installation while starting, the position of delivery valve is
A.Fully open
B.Fully closed
C.Half open
D.More than half open
E.Less than half open
In a flowing fluid, a particle may possess
A.Inertial energy
B.Pressure energy
C.Kinetic energy
D.Elevation or gravitation potential energy
E.All the above
A mouthpiece cannot be used under very large head because
A.The variation in discharge is large
B.The flow through mouthpiece is erratic
C.Vortex is created at the vena contracta
D.Cavitation occurs at the vena contracta
E.Of practical difficulties in contraction
