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.Management Sciences
Category: Hydraulics and Fluid Mechanics
Metacentre is the point of intersection of _________________________?
A. vertical upward force through e.g. of body and center line of body
B. buoyant force and the center line of body
C. mid point between e.g. and center of buoyancy
D. all of the above
E. none of the above
A pressure of 25 m of head of water is equal to________________?
A. 25 kN/m2
B. 245 kN/m2
C. 2500 kN/m2
D. 2.5kN/m2
E. 12.5 kN/m2
Fluid is a substance which offers no resistance to change of_________________?
A. pressure
B. flow
C. shape
D. volume
E. temperature
When the flow parameters at any given instant remain same at every point, then flow is said to be____________________?
A. quasi static
B. steady state
C. laminar
D. uniform
E. static.
Practical fluids____________________?
A. are viscous
B. possess surface tension
C. are compressible
D. possess all the above properties
E. possess none of the above properties
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
A ship whose hull length is 100 m is to travel at 10 m/sec. For dynamic similarity, at what velocity should a 1:25 model be towed through water ?
A. 10 m/sec
B. 25 m/sec
C. 2 m/sec
D. 50 m/sec
E. 250 m/sec
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
A body floats in stable equilibrium________________?
A. when its meatcentric height is zero
B. when the metancentre is above e.g
C. when its e.g. is below it’s center of buoyancy
D. metacentre has nothing to do with position of e.g. for determining stability
E. none of the above
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