Material Science Set 39

Electrical Engineering

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This set of Material Science Multiple Choice Questions & Answers (MCQs) focuses on Material Science Set 39

Q1 | non metallic coating gives best protection against corrosion over metallic coating. The statement is                            
  • true
  • false
  • not applicable to it
  • none of the above
Answer: false
Q2 | metalic coatings are more durable than nonmetalic coatings. This statement is
  • false
  • true
  • not applicable to it
  • none of the above
Answer: true
Q3 | one of following method is a metallic coating method for protection from corrosion
  • metal spraying
  • electroplatin g
  • metal cladding
  • all of the above
Answer: all of the above
Q4 | in hot dipping process, liquid metal of zinc is never used in any case. This statement is
  • true
  • false
  • not applicable to it
  • none of the above
Answer: false
Q5 | in hot dipping method of metal coating, which metal is coated on the steel to protect from corrosion ?
  • silver
  • aluminium
  • chromium
  • zinc
Answer: zinc
Q6 | in hot dipping method of metal coating, which one of the following metal is used ?
  • copper
  • silver
  • aluminium
  • none of the above
Answer: none of the above
Q7 | in electroplating process for a metal coating, the metallic component on which coating is
  • anode
  • cathode
  • electrolyte solution
  • none of the above
Answer: cathode
Q8 | in electroplating process for metal coating, the metallic component on which coating is needed, is made anode in the process. This statement is                        
  • false
  • true
  • not applicable to it
  • none of the above
Answer: false
Q9 | one of the following is a metal used for metallic coatings, used fro protection from corrosion
  • chromate coating
  • phosphate coating
  • plastic coating
  • all of the above
Answer: all of the above
Q10 | one of the following is a non-metallic coatings, used for protection from corrosion
  • chromate coating
  • phosphate coating
  • plastic coating
  • all of the above
Answer: all of the above
Q11 | corrosion inhibitors are used to protect the metal from corrosion. This statement is
  • true
  • false
  • not applicable to it
  • none of the above
Answer: true
Q12 | corrosion inhibitors are applied on the metal by electroplating process. Te statement is
  • true
  • false
  • not applicable to it
  • none of the above
Answer: false
Q13 | corrosion inhibitors are the chemicals that react with the metal surface, gets absorb and form a thin film on metal . This statement is
  • true
  • false
  • not applicable to it
  • none of the above
Answer: true
Q14 | one of the following is the main application of corrosion inhibitors
  • power plant
  • engine coolin g system
  • pipeline carrying hydrocarbon s
  • none of the above
Answer: none of the above
Q15 | the corrosion inhibitor work by one of following mechanisms
  • they form precipitate and coat the metal
  • they combine with corrosion product films
  • they absorb on metal surface
  • all of the above
Answer: all of the above
Q16 | one of the following is inhibitor which is used in metal protection.
  • zinc
  • aluminium
  • copper
  • none of the above
Answer: none of the above
Q17 | in cathodic protection, it protects the metal by coating it with a suitable method. This statement is --
  • true
  • false
  • not applicable to it
  • none of the above
Answer: false
Q18 | one of the following processes is a cathodic protection method.
  • hot dipping
  • electroplatin g
  • impresssed current
  • phosphating
Answer: impresssed current
Q19 | one of the following processes is a cathodic protection method.
  • metal cladding
  • metal spraying
  • hot dipping
  • none of the above
Answer: none of the above
Q20 | one of the following processes is a cathodic protection method.
  • metal spraying
  • electroplatin g
  • metal cladding
  • sacrificial anode
Answer: sacrificial anode
Q21 | one of the following is a main advantage of sacrificial anode method
  • external power supply is not required
  • minimum maintenance
  • very easy to operate
  • all of the above
Answer: all of the above
Q22 | one of the following is the main advantage of impressed current method
  • applicable to large objects
  • uncoated parts can be protect
  • can protect underground steel structure
  • all of the above
Answer: all of the above
Q23 | anodes are dissolving in case of sacrificial anode method which is one of the cathodic protectionmethod. This statement is                   
  • true
  • false
  • not applicable to it
  • none of the above
Answer: true
Q24 | anodes are dissolving in case of impressed current method, which is one of the cathodic protection method. This statement is
  • false
  • true
  • not applicable to it
  • none of the above
Answer: false
Q25 | one of the following is a corrosion resistance alloy
  • stainless steel
  • nickel base alloys
  • cobalt base alloys
  • all of the above
Answer: all of the above
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