MCQs
Total Questions : 350
| Page 29 of 35 pages
Answer: Option D. -> Manganese
Manganese reduces the formation of iron sulphide in steel
Manganese reduces the formation of iron sulphide in steel
Answer: Option A. -> Improve machinability
Tempering is a process of heat treating, which is used to increase the toughness of iron-based alloys
Tempering is a process of heat treating, which is used to increase the toughness of iron-based alloys
Answer: Option D. -> Nickel and iron alloy having high permeability
Permalloy is a nickel–iron magnetic alloy, with about 80% nickel and 20% iron content
Permalloy is a nickel–iron magnetic alloy, with about 80% nickel and 20% iron content
Answer: Option A. -> Formation of bainite structure
Austempering is heat treatment that is applied to ferrous metals, most notably steel and ductile iron.
In steel it produces a bainite microstructure whereas in cast irons it produces a structure of acicular ferrite and high carbon, stabilized austenite known as ausferrite
Austempering is heat treatment that is applied to ferrous metals, most notably steel and ductile iron.
In steel it produces a bainite microstructure whereas in cast irons it produces a structure of acicular ferrite and high carbon, stabilized austenite known as ausferrite
Answer: Option B. -> Phosphorus
In low carbon steels, Phosphorus raises the yield point and improves the resistance to atmospheric corrosion.
In low carbon steels, Phosphorus raises the yield point and improves the resistance to atmospheric corrosion.
Answer: Option C. -> Hardness and strength
when Silicon is added to copper it improves the hardness and strength
when Silicon is added to copper it improves the hardness and strength
Answer: Option D. -> 70%
The principal iron ores are hematite (Fe2O3).
Hematite is an iron oxide mineral.
Hematite contains iron about 70%.
The principal iron ores are hematite (Fe2O3).
Hematite is an iron oxide mineral.
Hematite contains iron about 70%.
Answer: Option D. -> The points of discontinuity
For the allotropic forms of iron, the points of arrest are The points of discontinuity
For the allotropic forms of iron, the points of arrest are The points of discontinuity
Answer: Option B. -> White metal
The metal suitable for bearings subjected to heavy loads, is White metal
The metal suitable for bearings subjected to heavy loads, is White metal
Answer: Option B. -> Hardness
The addition of nickel to copper improves strength and corrosion resistance while allowing the alloy to remain ductile.
The addition of nickel to copper improves strength and corrosion resistance while allowing the alloy to remain ductile.
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