The formation of oxide film on a metal due to atmospheric exposure reduces its____________?

Related Mcqs:

1. Which metal is protected by the layer of its own oxide ?

   A. Iron
   B. Silver
   C. Calcium
   D. Aluminium

2. The increase in hardness of metal due to its cold working is termed as the _______________ hardening?

   A. Work
   B. Age
   C. Induction
   D. Flame

3. Reduction in the grain size reduces the _______________ of the material?

   A. Fatigue resistance
   B. Tensile strength
   C. Creep resistance
   D. All A., B. & C.

4. Presence of even very minute amount (say 0.1%) of ______________ in copper, reduces its electrical conductivity very seriously?

   A. Bismuth
   B. Arsenic
   C. Antimony
   D. Both B. and C.

5. Which of the following is the most prone to atmospheric corrosion ?

   A. Silver
   B. Iron
   C. Tin
   D. Copper

6. Atmospheric corrosion of metals result from their________________?

   A. Slow oxidation
   B. Fast oxidation
   C. Fast hydration
   D. Slow dehydration

7. Nickel base alloys with ______________ are known as monel metal?

   A. Zinc
   B. Tin
   C. Copper
   D. Molybdenum

8. Which of the following metals in not used for coating of the base metal to guard it against corrosion ?

   A. Lead
   B. Cadmium
   C. Magnesium
   D. Aluminium

9. Mercury is transported in metal containers made of________________?

   A. Aluminium
   B. Iron
   C. Lead
   D. Nickel

10. Babbitt metal (used for making bearings) comprises of__________________?

    A. Mainly tin (85%) and lead
    B. Saw dust and iron dust mixture
    C. Zinc and aluminium
    D. Copper and aluminium