Q.1
Which of the following statements is not true about white cast iron?
  • a) It has a silvery-white colour
  • b) White cast iron is quite hard
  • c) It melts with great difficulty
  • d) It can be used for delicate castings
Q.2
In which type of casting, molten metal is poured into moulds which keep on rotating?
  • a) Centrifugal casting
  • b) Chilled casting
  • c) Hollow casting
  • d) Sand casting
Q.3
Which of the following is not a property of cast iron?
  • a) Cast iron is hard but brittle
  • b) Cast iron can be magnetised
  • c) It does not rust readily
  • d) Cast iron is not ductile
Q.4
The manganese content in cast iron should be kept below __________
  • a) 0.75%
  • b) 1%
  • c) 1.5%
  • d) 1.75%
Q.5
Which variety of cast iron is obtained by melting cast iron with wrought iron scrap?
  • a) Mottled cast iron
  • b) Chilled cast iron
  • c) Malleable cast iron
  • d) Toughened cast iron
Q.6
In which type of casting, the outer surface is made hard while the inner surface remains relatively soft?
  • a) Hollow casting
  • b) Sand casting
  • c) Chilled casting
  • d) Die casting
Q.7
The process of converting pig iron into wrought iron by stirring in the molten state is called as _________
  • a) Puddling
  • b) Refining
  • c) Rolling
  • d) Shingling
Q.8
The process of puddling is carried out in a ________
  • a) Blast furnace
  • b) Flask
  • c) Cupola furnace
  • d) Reverberatory furnace
Q.9
The material obtained at the end of the shingling process is called as ________
  • a) Flux
  • b) Slag
  • c) Bloom
  • d) Fuse
Q.10
Aston’s process is used to manufacture _________
  • a) Steel
  • b) Wrought iron
  • c) Pig iron
  • d) Cast iron
Q.11
Which of the following is not a property pf wrought iron?
  • a) Wrought iron is ductile and malleable
  • b) It fuses easily
  • c) The specific gravity of wrought iron is about 7.8
  • d) Wrought iron can be easily forged and welded
Q.12
Corrosion of ferrous metals is known as ___________
  • a) Enamelling
  • b) Rusting
  • c) Galvanising
  • d) Coal Tarring
Q.13
Which metal is used in the galvanisation of iron in order to prevent it from rusting?
  • a) Zinc
  • b) Sodium
  • c) Copper
  • d) Silver
Q.14
Which chemical is used in the method of parkerizing, adopted to prevent corrosion?
  • a) Alum
  • b) Borax
  • c) Pareo
  • d) Vitriol
Q.15
Dust of pure _________ is used to cover the article to be treated for corrosion in the method of sherardising.
  • a) Platinum
  • b) Zinc
  • c) Copper
  • d) Barium
0 h : 0 m : 1 s