Capillarity is due to
A.Cohesion
B.Adhesion
C.Adhesion and cohesion
D.Molecular structure
E.Gravity
Category: Fluid Mechanics and Hydraulic Machines Mcqs
If the Mach number of a flow is 3 the flow is known as
A.Super-supersonic
B.Supersonic
C.Sonic
D.Sub-sonic
E.None of the above
Mercury is suitable for manometers because
A.It has high density
B.It can be easily seen in tube
C.It does not stick to tube walls
D.It moves easily
E.It is generally not used in manometers
If a centrifugal pump is noisy in operation, the cause may be________________?
A.Priming faulty
B.Suction head too high
C.Air in water
D.Discharge head too high
E.Mechanical defect
Continue reading “If a centrifugal pump is noisy in operation, the cause may be________________?”
Two units are homologous when they are geometrically similar and have _______________?
A.Similar stream lines
B.Same Reynolds number
C.Same efficiency
D.Same Froud’s number
E.None of these answers
In a centrifugal pump the pressure energy of water is increased because of
A.Rotation of impeller
B.Centrifugal force
C.Momentum of particles
D.Lift of particles
E.None of the above
The purpose of surge tank in a pipe line is to
A.Smoothen the flow of water
B.Minimise friction losses in pipe
C.Prevent occurrence of hydraulic jump
D.To relieve the pressure due to water hammer
E.To maintain the flow of water under emergency conditions
Geometric similarity between model and prototype means
A.The similarity of discharge
B.The similarity of linear dimensions
C.The similarity of motion
D.The similarity of forces
The ratio inertia forces/surface tension force gives a non-dimensional number known as
A.Weber number
B.Shround number
C.Cauchy number
D.Euler number
E.Froude number
Falling drops of water become spherical due to
A.Adhesion
B.Cohesion
C.Dynamic viscosity
D.Kinematic viscosity
E.Surface tension
