A.increase lustre
B.prevent action of oxygen
C.prevent action of water
D.harden the surface
Related Mcqs:
- Galvanised iron is
- BOD of a river water is found very high. This means water __________?
- An increase in the carbide/graphite ratio in cast iron tends to
- Green House effect is caused by __________?
- Iron pipes lying under acidic soil are often attached to blocks of magnesium for protection from rusting. Magnesium offers protection to iron against corrosion because it
- In control cooling water system, chromates, phosphates and silicates are added to water
- In case the concentration of oxygen in the tissues were almost as high as at the respiratory surface then:
- BOD stands for __________?
- The ‘crowning’ of flat pulleys is generally done
- The ‘crowning’ of flat pulleys is generally done pulley
