A. atmospheric pressure
B. surface tension
C. force of adhesion
D. force of cohesion
E. viscosity
Hydraulics and Fluid Mechanics
For a floating body to be in equilibrium __________________?
A. meta center should be above e.g.
B. center of buoyancy and e.g. must lie on same vertical plane
C. a righting couple should be formed
D. all of the above
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
Specific weight of sea water is more that of pure water because it contains ________________?
A. dissolved air
B. dissolved salt
C. suspended matter
D. all of the above
E. heavy water
Specific weight of water in S.I. units is equal to_________________?
A. 1000 N/m3
B. 10000 N/m3
C. 9.81 xlO3 N/m3
D. 9.81 xlO6N/m3
E. 9.81 N/m3
The fluid forces considered in the Navier Stokes equation are__________________?
A. gravity, pressure and viscous
B. gravity, pressure and turbulent
C. pressure, viscous and turbulent
D. gravity, viscous and turbulent
E. none of the above
A hydraulic press has a ram of 15 cm diameter and plunger of 1.5 cm. It is required to lift a weight of 1 tonne. The force required on plunger is equal tc__________________?
A. 10 kg
B. 100 kg
C. 1000 kg
D. 1 kg
E. 10,000 kg
If the surface of liquid is convex, men_________________?
A. cohesion pressure is negligible
B. cohesion pressure is decreased
C. cohesion pressure is increased
D. there is no cohesion pressure
E. none of the above
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
