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

Related Mcqs:

1. 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

2. To avoid vaporisation in the pipe line, the pipe line over the ridge is laid such that it is not more than____________________?

   A. 2.4 m above the hydraulic gradient
   B. 6.4 m above the hydraulic gradient
   C. 10.0 m above the hydraulic gradient
   D. 5.0 above the hydraulic gradient
   E. none of the above

3. The depth of the center of pressure on a vertical rectangular gate 8 m wide and 6 m high, when the water surface coincides with the top of the gate, is____________________?

   A. 2.4 m
   B. 3.0 m
   C. 4.0 m
   D. ”2.5 m
   E. 5.0 m

4. The upper surface of a weir over which water flows is known is_____________________?

   A. crest
   B. nappe
   C. sill
   D. weir top
   E. contracta

5. 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

6. At the center line of a pipe flowing under pressure where the velocity gradient is zero, the shear stress will be_________________?

   A. minimum
   B. maximum
   C. zero
   D. negative value
   E. could be any value

7. 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

8. 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

9. 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 metres of water column
   B. 3 metres of water column
   C. 3.5 metres of water column
   D. 4 m of water column
   E. none of the above

10. 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