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 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. 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. 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

6. 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

7. 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

8. The velocity of jet of water travelling out of opening in a tank filled with water is proportional to___________________?

   A. head of water (h)
   B. h2
   C. V/T
   D. h2
   E. h3/1.

9. 15 cumecs, the depth d and width are related by For drains up to___________________?

   A. d = 0.2 B
   B. d = 0.5 B
   C. B = 0.2 d
   D. B = 0.5 d

10. In trickling filter, B.O.D. is reduced to___________________?

    A. 30 to 40%
    B. 40 to 60%
    C. 60 to 80%
    D. 80 to 90%