Top 1000+ Solved Material Science MCQ Questions Answer
Q. for corrosion to takes place, there is need of
a. only anode
b. only anode
c. only anode, cathode and
d. none of the
Q. on of following metal do not corrode
a. low carbon steel
b. medium carbon steel
c. high carbon steel
d. none of the above
Q. all the metals stated below are very sensitive to corrosion
a. silver
b. gold
c. copper
d. none of the above
Q. on of the metal stated below is highly corrodent
a. cast iron
b. high carbon steel
c. mild steel
d. all of the above
Q. in electrochemical corrosion, at anode which type of chemical reaction takingplace
a. oxidation reaction
b. reduction reaction
c. metallic reation
d. none of the above
Q. in electrochemical corrosion, at cathode which type of chemical reaction taking place
a. metallic reaction
b. reduction reaction
c. oxidation reaction
d. none of the above
Q. in electrochemical corrosion, at cathode which type of chemical reaction is taking place
a. peretectic reaction
b. eutectic reaction
c. eutectoid reaction
d. none of the above
Q. in electrochemical corrosion at anode, which type of chemical reaction is taking
a. eutectic reaction
b. peritectic reaction
c. eutectoid reaction
d. none of the above
Q. which of the factor given below, influencing corrosion of steel?
a. temperature
b. oxygen in the atmosphere
c. moisture
d. all of the above
Q. dry corrosion is taking place due to
a. when carbon dioxide in the air reacts with metal
b. when nitrogen in the air reacts with metal
c. when sulphur in the air reacts with the metal
d. when oxygen in the air reacts with metal
Q. what is the nature of oxide film, formed on the ferrous metal due to reaction with atmosphere?
a. porous
b. non-porous
c. silky
d. all of the above
Q. what is nature of oxide film formed on the aluminium and copper metal due to reaction with atmosphere
a. porous
b. non-porous
c. silky
d. none of the above
Q. wet corrosion is based on which phenomenon
a. electro- mechaniacl
b. electro- chemical
c. electro- biologica l
d. none of the above