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

Related Mcqs:

1. 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____________________?

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

2. The work done per unit mass of air in compression will’be least when n is equal to______________?

   A. 1
   B. 1.2 ,
   C. 1.3
   D. 1.4
   E. 1.5

3. 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

4. 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

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. For pipes, turbulent flow occurs when Reynolds number is _____________________?

   A. less than 2000
   B. between 2000 and 4000
   C. more than 4000
   D. less than 4000
   E. none of the above

7. Dimensions of surface tension are___________________?

   A. MlL°T2
   B. MlL°Tx
   C. MlL r2
   D. MlL2T2
   E. MlL°t

8. The rise or depression of liquid in a tube due to surface tensionwim increase in size of tube will________________?

   A. increase
   B. remain unaffected
   C. may increase or decrease depending on the characteristics of liquid
   D. decrease
   E. unpredictable

9. 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

10. 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