The upper surface of a weir over which water flows is known is________________?

Related Mcqs:

1. A square surface 3 m x 3 m lies in a vertical line in water pipe its upper edge at vater surface. The hydrostatic force on square surface is __________________?

   A. 9,000 kg
   B. 13,500 kg
   C. 18,000 kg
   D. 27,000 kg
   E. 30,000 kg

2. 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.

3. 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

4. An open vessel of water is accelerated up an inclined plane. The free water surface will___________________?

   A. be horizontal
   B. make an angle in direction of inclination of inclined plane
   C. make an angle in opposite direction to inclination of inclined plane
   D. any one of above is possible
   E. none of the above

5. Surface energy per unit area of a surface is numerically equal to ___________________?

   A. atmospheric pressure
   B. surface tension
   C. force of adhesion
   D. force of cohesion
   E. viscosity

6. Surface energy per unit area of a surface is numerically equal to___________________?

   A. atmospheric pressure
   B. surface tension
   C. force of adhesion
   D. force of cohesion
   E. viscosity

7. If the atmospheric pressure on the surface of an oil tank (sp. gr. 0.8) is 0.2 kg/cm”, the pressure at a depth of 50 m below the oil surface will be _____________________?

   A. 2 meters of water column
   B. 3 meters of water column
   C. 5 meters of water column
   D. 6 meters of water Column
   E. 7 meters of water column

8. The pressure in the air space above an oil (sp. gr. 0.8) surface in a tank is 0.1 kg/cm”. The pressure at 2.5 m below the oil surface will be ___________________?

   A. 2 meters of water column
   B. 3 meters of water column
   C. 3.5 meters of water column
   D. 4 m of water column
   E. none of the above

9. The vapour pressure over the concave surface is________________?

   A. less man the vapour pressure over the plane surface
   B. equal to the vapour pressure over the plane surface
   C. greater than the vapour pressure over the plane surface
   D. zero
   E. none of the above

10. The surface tension of mercury at normal temperature compared to that of water is____________________?

    A. more
    B. less
    C. same
    D. more or less depending on size of glass tube
    E. none of the above.