Top 1000+ Solved Material Science MCQ Questions Answer
Q. is the limitation of anodic protection to prevent corrosion
a. applicable only to those metals and alloys which exibit passivity
b. some corrosion take place at a slow rates
c. both a and b
d. none of the above
Q. the method of anodic protetion can be applied to carrying corrosives chemical to prevent corrosion
a. stainless steel containers
b. chemical reactors
c. tanks and pipes
d. all of the above
Q. the protective coatings applied to prevent corrosion should have the property of
a. a good corrosionresi stance
b. perfect adherence to underlying metal
c. completely cover the surface
d. all of the above
Q. the most common non metallic coating used to prevent corrosion of metals is
a. paints
b. enamels
c. porcelain
d. all of the above
Q. in metallic coating of metals afford galvanic protection to the steel
a. zinc
b. cadmium
c. both a and b
d. tin
Q. is the method to apply metallic coating to prevent corrosion
a. hot dipping
b. metal spraying
c. electrplating
d. all of the above
Q. coatings are very useful for protecting undergraound tanks and pipes from corrosion
a. bituminous
b. paints
c. zinc
d. cadmium
Q. oxidizing substances like is used as anodic inhibitors for the protection of iron and steel from corrosion
a. chromates
b. nitrates
c. phosphates
d. all of the above
Q. inhibitors prevent evolution of hydrogen (in case of acidic solution) and oxygen absorption (in case of neutral solution) to prevent corrosion
a. cathodic
b. anodic
c. both a and b
d. none of the above
Q. are used as cathodic inhibitors to prevent corrosion of metals
a. chromates
b. nitrates
c. antimony and arsenic oxides
d. phosphates
Q. corrosion is defined as -
a. the deterioration of environment
b. the deterioration of metal
c. the deterioration of both metal and environment
d. none of the above
Q. corrosion is defined as -
a. the deterioration of metal by reaction with its environment
b. physico- chemical interaction between metal and its environment
c. loss of metal due to chemical reaction between anode, cathode and electrolyte
d. all of the above
Q. corrosion give large impact on SHE, that is
a. shell, harvest, equation
b. stamp, heat and equilateral
c. safety, health and environment
d. none of the above
Q. the natural tendency of metal to revert back its original form, due to corrosion is termed as
a. stress corrosion
b. corrosion fatigue
c. general corrosion
d. corrosion cycle