Top 1000+ Solved Material Science MCQ Questions Answer
Q. during design and fabrication of component, type of joints should be used
a. welded
b. bolted
c. riveted
d. all of the above
Q. during design and fabriaction of the component, a good design should have properties
a. no crevices between adjacent areas
b. free drainage and easy washings
c. no chance for differential aeration corrosion
d. all of the above
Q. in modification of corrosive environment, the corrosive nature of environment is reduced by
a. removing the harmful components in the environment
b. neutralising the effect of corrosive constituents of environment
c. both a and b
d. none of the above
Q. modification of corrosive environment is done by technique
a. deaeration
b. deactivation
c. dehumidifica tion
d. all of the above
Q. in modification of corrosive environment, in oxygen concentrated cell, the technique of removel of oxygen from acqueous environmnet to reduce corrosion is called as
a. deaeration
b. deactivation
c. dehumidifica tion
d. all of the above
Q. in modification of corrosive environment, during technique, certain chemicals are added which combine rapildywith oxygen in acquous solution and reduce
a. deaeration
b. deactivation
c. dehumidifica tion
d. all of the above
Q. chemical is added during deactivation technique to modify corrosive environment
a. sodium sulphite
b. hydrazine hydrrate
c. both a and b
d. none of the above
Q. in modification of corrosion environment, technique resuces the moisture content of air in such a way that moisture should not condense on the metal surface causing corrosion
a. deaeration
b. deactivation
c. dehumidifica tion
d. all of the above
Q. substance which absobe moisture on its surface is used in dehumidification technique for midifiaction of corrosive environment
a. alumina
b. silica gel
c. both a and b
d. none of the above
Q. method of corrosive prevention is useful only in closed areas like air conditioned shops, laboratories, computer rooms etc.
a. deactivation
b. dehumidifica tion
c. alkaline neutralizatio n
d. dearation
Q. method is used to prevent the corroive environmnet by neutralising the acidic character of corrosive conditions
a. deactivation
b. dehumidifica tion
c. alkaline neutralizatio n
d. dearation
Q. substance is used in alkaline neutralization to prevent corrosive effect of environment
a. nh3
b. naoh
c. lime
d. all of the above
Q. method of corrosion prevention has widely ued in controlling the corrosion of refinery equipments
a. deactivation
b. dehumidifica tion
c. alkaline neutralizatio n
d. dearation
Q. in use of speacial alloys, alloying of with iron increase corrosion resitance
a. cr
b. ni
c. both a and b
d. tin
Q. in use of speacial alloys, alloying with increases corrosion resistance of brasses and
a. cr
b. ni
c. both a and b
d. tin