| 1. | Manganese is added in low carbon steel to ? | |
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make the steel tougher and harder
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raise the yield point
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make the steel ductile and of good bending qualities
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all of the above
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Report Question| 2. | Duplex process of steel making is a combination of ? | |
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basic bessemer and acid open hearth processes
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acid bessemer and basic open hearth processes
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acid bessemer and acid open hearth processes
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basic bessemer and basic open hearth processes
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| 3. | Which of the following impurity in cast iron promotes graphite nodule formation and increases the fluidity of the molten metal ? | |
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Silicon
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Sulphur
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Manganese
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Phosphorus
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| 4. | Nodular cast iron is produced by adding ............ to the molten cast iron ? | |
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nickel
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chromium
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copper
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magnesium
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| 5. | The lower critical temperature ? | |
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decreases as the carbon content in steel increases
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increases as the carbon content in steel increases
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is same for all steels
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depends upon the rate of heating
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| 6. | Cast iron is a ? | |
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ductile material
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malleable material
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brittle material
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tough material
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| 7. | Connecting rod is, usually, made from ? | |
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low carbon steel
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high carbon steel
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medium carbon steel
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high speed steel
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| 8. | In induction hardening ............... is high ? | |
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current
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voltage
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frequency
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tempering
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| 9. | The property of a material due to which it breaks with little permanent distortion, is called ? | |
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brittleness
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ductility
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malleability
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plasticity
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| 10. | The hardness of steel increases if it contains ? | |
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pearlite
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ferrite
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cementite
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martensite
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