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This set of Material Science Multiple Choice Questions & Answers (MCQs) focuses on Material Science Set 36
Q1 | inhibitors prevent evolution of hydrogen (in case of acidic solution) and oxygen absorption (in case of neutral solution) to prevent corrosion
- cathodic
- anodic
- both a and b
- none of the above
Q2 | are used as cathodic inhibitors to prevent corrosion of metals
- chromates
- nitrates
- antimony and arsenic oxides
- phosphates
Q3 | corrosion is defined as -
- the deterioration of environment
- the deterioration of metal
- the deterioration of both metal and environment
- none of the above
Q4 | corrosion is defined as -
- the deterioration of metal by reaction with its environment
- physico- chemical interaction between metal and its environment
- loss of metal due to chemical reaction between anode, cathode and electrolyte
- all of the above
Q5 | corrosion give large impact on SHE, that is
- shell, harvest, equation
- stamp, heat and equilateral
- safety, health and environment
- none of the above
Q6 | the natural tendency of metal to revert back its original form, due to corrosion is termed as
- stress corrosion
- corrosion fatigue
- general corrosion
- corrosion cycle
Q7 | for corrosion to takes place, there is need of
- only anode
- only anode
- only anode, cathode and
- none of the
Q8 | on of following metal do not corrode
- steel
- cast iron
- aluminium
- none of the above
Q9 | on of following metal do not corrode
- low carbon steel
- medium carbon steel
- high carbon steel
- none of the above
Q10 | on of following metal do not corrode
- aluminium
- copper
- silver
- all of the above
Q11 | all the metals stated below are very sensitive to corrosion
- silver
- gold
- copper
- none of the above
Q12 | on of the metal stated below is highly corrodent
- cast iron
- high carbon steel
- mild steel
- all of the above
Q13 | in electrochemical corrosion, at anode which type of chemical reaction takingplace
- oxidation reaction
- reduction reaction
- metallic reation
- none of the above
Q14 | in electrochemical corrosion, at cathode which type of chemical reaction taking place
- metallic reaction
- reduction reaction
- oxidation reaction
- none of the above
Q15 | in electrochemical corrosion, at cathode which type of chemical reaction is taking place
- peretectic reaction
- eutectic reaction
- eutectoid reaction
- none of the above
Q16 | in electrochemical corrosion at anode, which type of chemical reaction is taking
- eutectic reaction
- peritectic reaction
- eutectoid reaction
- none of the above
Q17 | which of the factor given below, influencing corrosion of steel?
- temperature
- oxygen in the atmosphere
- moisture
- all of the above
Q18 | dry corrosion is taking place due to
- when carbon dioxide in the air reacts with metal
- when nitrogen in the air reacts with metal
- when sulphur in the air reacts with the metal
- when oxygen in the air reacts with metal
Q19 | what is the nature of oxide film, formed on the ferrous metal due to reaction with atmosphere?
- porous
- non-porous
- silky
- all of the above
Q20 | what is nature of oxide film formed on the aluminium and copper metal due to reaction with atmosphere
- porous
- non-porous
- silky
- none of the above
Q21 | wet corrosion is based on which phenomenon
- electro- mechaniacl
- electro- chemical
- electro- biologica l
- none of the above
Q22 | general corrosion is also known as
- uniform corrosion
- localised corrosion
- harmless corrosion
- all of the above
Q23 | the best example of general corrosion is
- corrosion of manhole cover
- corrosion of springs
- corrosion of fasteners
- none of the above
Q24 | the best and economic way of preventing general corrosion is
- coating the metal
- cathodic protection
- using proper inhibitors
- all of the above
Q25 | galvanic corrosion is also known as
- bimetallic corrosion
- dry corrosion
- high temperature corrosion
- low temperature corrosion