A. Lead
B. Cadmium
C. Magnesium
D. Aluminium
Related Mcqs:
- The process of coating steel sheets by zinc to improve its corrosion resistance is called___________________?
A. Calorising
B. Galvanising
C. Zincification
D. Tempering - Tin coating on metals is not done by_____________________?
A. Spraying
B. Powder metallurgy
C. Hot dipping
D. Electro-deposition - Corrosion involves exchange of electrons in ____________ corrosion?
A. Chemical
B. Electrochemical
C. Both A. & B.
D. Neither A. nor B. - Atmospheric corrosion of metals result from their________________?
A. Slow oxidation
B. Fast oxidation
C. Fast hydration
D. Slow dehydration - Which of the following is universally employed as the low expansion metal in the bimetallic thermometer, which is an iron-nickel alloy containing 36% nickel and has very low co-efficient of expansion (1/20th of ordinary metals) ?
A. Invar
B. Constantan
C. Chromel
D. Alumel - Nickel base alloys with ______________ are known as monel metal?
A. Zinc
B. Tin
C. Copper
D. Molybdenum - Galvanising (i.e., zinc coating) of steel sheets is done to______________________?
A. Prevent its rusting by contact with corrosive atmosphere
B. Protect the base metal by cathodic protection
C. Both A. & B.
D. Neither A. nor B. - Generally _____________ are subjected to galvanising (i.e., zinc coating)?
A. Non-ferrous metals
B. Non-metals
C. Low carbon steels
D. Stainless steel - Tin base and lead base alloys are used for bearing materials. Tin compared to lead has lower_________________?
A. Price
B. Corrosion resistance
C. Thermal conductivity
D. Abundant availability - Which of the following is the most prone to atmospheric corrosion ?
A. Silver
B. Iron
C. Tin
D. Copper
