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

Related Mcqs:

1. 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

2. 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

3. 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

4. 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.

5. 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

6. 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

7. Total pressure on a lmxlm gate immersed vertically at a depth of 2 m below the free water surface will be ___________________?

   A. 1000 kg
   B. 4000 kg
   C. 2000 kg
   D. 8000 kg
   E. 16000 kg

8. The pressure in Pascals at a depth of 1 m below the free surface of a body of water will be equal to________________?

   A. 1 Pa
   B. 91Pa
   C. 981 Pa
   D. 9810 Pa
   E. 98,100 Pa

9. What is the change in cost per unit variable change called ?

   A. Variable cost
   B. Incremental cost
   C. Fixed cost
   D. Supplemental cost

10. The discharge per unit plan area of a sedimentation tank, is generally called________________?

    A. Over flow rate
    B. Surface loading
    C. Over flow velocity
    D. All the above