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.Management Sciences
Category: Fluid Mechanics
Cavitation is caused by_____________________?
A. high velocity
B. high pressure
C. weak material
D. low pressure
E. low viscosity
During the opening of a valve in a pipe line, the flow is_________________?
A. steady
B. unsteady
C. uniform
D. laminar
E. free vortex type
A metal with specific gravity of o floating in a fluid of same specific gravity a will____________________?
A. sink to bottom
B. float over fluid
C. partly immersed
D. be fully immersed with top surface at fluid surface
E. none of the above
The ratio of absolute viscosity to mass density is known as_________________?
A. specific viscosity
B. viscosity index
C. kinematic viscosity
D. coefficient of viscosity
E. coefficient of compressibility
Liquids_________________?
A. cannot be compressed
B. occupy definite volume
C. are not affected by change in pressure and temperature
D. are not viscous
E. none of the above
The flow which neglects changes in a transverse direction is known as_________________?
A. one dimensional flow
B. uniform flow
C. steady flow
D. turbulent flow
E. streamline flow
Buoyant force is___________________?
A. resultant force acting on a floating body
B. equal to the volume of liquid displaced
C. force necessary to keep a body in equilibrium
D. the resultant force on a body due to the fluid surrounding it
E. none of the above
The total pressure on the surface of a vertical sluice gate 2 m x 1 m with its top 2 m surface being 0.5 m below the water level will be ________________?
A. 500 kg
B. 1000 kg
C. 1500 kg
D. 2000 kg
E. 4000 kg
A piece of wood having weight 5 kg floats in water with 60% of its volume under the liquid. The specific gravity of wood is _________________?
A. 0.83
B. 0.6
C. 0.4
D. 0.3
E. none of the above
Mach number is significant in_____________________?
A. supersonics, as with projectiles and jet propulsion
B. full immersion or completely enclosed flow, as with pipes, aircraft wings, nozzles etc.
C. simultaneous motion through two fluids where there is a surface of dis-continuity, gravity force, and wave making effects, as with ship’s hulls
D. all of fhe above
E. none of the above
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