Specific weight of sea water is more that of pure water because it contains ________________?

Related Mcqs:

1. As compared to fresh river water, sea water contains oxygen_________________?

   A. 10% less
   B. 20% less
   C. 10% more
   D. 20% more

2. A sewer pipe contains 1 mm sand particles of specific gravity 2.65 and 5 mm organic particles of specific gravity 1.2, the minimum velocity required for removing the sewerage, is_____________________?

   A. 0.30 m/sec
   B. 0.35 m/sec
   C. 0.40 m/sec
   D. 0.45 m/sec

3. The specific weight of water is 1000 kg/m” _______________?

   A. at norma] pressure of 760 mm
   B. at 4°C temperature
   C. at mean sea level
   D. all the above
   E. none of the above.

4. Specific weight of water in S.I. units is equal to_________________?

   A. 1000 N/m3
   B. 10000 N/m3
   C. 9.81 xlO3 N/m3
   D. 9.81 xlO6N/m3
   E. 9.81 N/m3

5. A piece of wood having weight 5 kg floats in water with 60% of its volume under the liquid. The specific gravity of wood is__________________?

   A. 0.83
   B. 0.6
   C. 0.4
   D. 0.3
   E. none of the above

6. weight of water, the hydraulic mean depth of the sewer and the bed slope w is the unit of the sewer, then the tractive force exerted by flowing water, is________________________?

   A. w r S S
   B. w r1/2
   C. w r S
   D. w r2/3

7. If w is the specific weight of liquid and k the depth of any point from the surface, then pressure intensity at that point will be____________________?

   A. h
   B. wh
   C. w/h
   D. h/w
   E. h/wh

8. A piece of metal of specific gravity 13.6 is placed in mercury of specific gravity 13.6, what fraction of it volume is under mercury ?

   A. the metal piece will simply float over the mercury
   B. the metal piece will be immersed in mercury by half
   C. whole of the metal piece will be immersed with its top surface just at mercury level
   D. metal piece will sink to the bottom
   E. none of the above

9. A metal with specific gravity of o floating in a fluid of same specific gravity a will___________________?

   A. sink to bottom
   B. float over fluid
   C. partly immersed
   D. be fully immersed with top surface at fluid surface
   E. none of the above

10. A piece of metal of specific gravity 7 floats in mercury of specific gravity 13.6. What fraction of its volume is under mercury ?

    A. 0.5
    B. 0.4
    C. 0.515
    D. 0.5
    E. none of the above