Heavy duty leaf and coil springs contain carbon of the following order
0.2 %
0.5 %
0.8 %
1.0 %
Correct Answer :
D. 1.0 %
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pH value has nothing to do with basic solution
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1440°C
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Monel metal
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Magnesium alloys
Titanium alloys
Chromium alloys
Magnetic steel alloys
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Naked eye
Optical microscope
Metallurgical microscope
X-ray techniques
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Increases as the carbon content in steel increases
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Cementite and gamma iron
Ferrite and austenite
Ferrite and iron graphite
Which of the following impurity in cast iron makes it hard and brittle?
Silicon
Sulphur
Manganese
Phosphorus
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Soft and gives coarse grained crystalline structure
Soft and gives a fine grained crystalline structure
Hard and gives a coarse grained crystalline structure
Hard and gives a fine grained crystalline structure
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RC 65
RC 48
RC 57
RC 80
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The average grain size is a minimum
The grain size increases very rapidly
The grain size first increases and then decreases very rapidly
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White cast iron
Nodular cast iron
Malleable cast iron
Alloy cast iron
Which of the following is not the correct method of increasing fatigue limit?
Shot peening
Nitriding of surface
Cold working
Surface decarburisation
The hardness is the property of a material due to which it
Can be drawn into wires
Breaks with little permanent distortion
Can cut another metal
Can be rolled or hammered into thin sheets
Pearlite consists of
13% carbon and 87% ferrite
13% cementite and 87% ferrite
13% ferrite and 87% cementite
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An example of amorphous material is
Zinc
Lead
Silver
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High speed steel
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Heat resisting steel
Heavy duty leaf and coil springs contain carbon of the following order
0.2 %
0.5 %
0.8 %
1.0 %
Which of the following constituents of steels is softest and least strong?
Austenite
Pearlite
Ferrite
Cementite
Which of the following is an amorphous material?
Mica
Silver
Lead
Glass
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Steels are heated to 500 to 700°C
Cooling is done slowly and steadily
Internal stresses are relieved
All of these
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Austenite
Martensite
Pearlite
Cementite
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600°C
723°C
1147°C
1493°C
German silver is an alloy of
Silver and some impurities
Refined silver
Nickel, Copper and zinc
Nickel and copper