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
Related Mcqs:
- For hypersonic flow, the Mach number is___________________?
A. unity
B. greater than unity
C. greater than 2
D. greater than 4
E. greater than 10 - Reynolds number is significant in____________________?
A. supersonics, as with projectile 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 forces, and wave making effect, as with ship’s hulls
D. all of the above
E. none of the above - Froude number is significant in____________________?
A. supersonics, as with projectile 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 forces, and wave making effect, as with ship’s hulls
D. all of the above
E. none of the above - Which one of the following gases is most significant as air pollutant ?
A. Carbondioxide
B. Oxygen
C. Nitrogen
D. Sulphur-dioxide - If cohesion between molecules of a fluid is greater than adhesion between fluid and glass, then the free level of fluid in a dipped glass tube will be_________________?
A. higher than the surface of liquid
B. the same as the surface of liquid
C. lower than the surface of liquid
D. unpredictable
E. none of the above - Dimensions of surface tension are_________________?
A. MlL°T2
B. MlL°Tx
C. MlL r2
D. MlL2T2
E. MlL°t - The difference of pressure between the inside and outside of a liquid drop is_____________?
A.p = Txr
B.p = T/r
C. p = T/2r
D.p = 2T/r
E. none of the above - Centre of pressure compared to e.g. is______________?
A. above it
B. below it
C. at same point
D. above or below depending on area of body
E. none of the above - In an immersed body, center of pressure is ____________________?
A. at the center of gravity
B. above the center of gravity
C. below be center of gravity
D. could be above or below e.g. depending on density of body and liquid
E. unpredictable - For similarity, in addition to models being geometrically similar to prototype, the following in both cases should also be equal__________________?
A. ratio of inertial force to force due to viscosity
B. ratio of inertial force to force due to gravitation
C. ratio of inertial force to force due to surface tension
D. all the four ratios of inertial force to force due to viscosity, gravitation, surface tension, and elasticity
