| 1. | Which of the following display properties similar to that of steel ? | |
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Blackheart cast iron
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Whiteheart cast iron
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both (a) and (b)
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none of these
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Report Question| 2. | The process of inducing carbon to ...............carbon steels in order to give it a hard surface is known as carburising ? | |
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low
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medium
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high
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all
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| 3. | Tin base white metals are used where the bearings are subjected to ? | |
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large surface wear
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elevated temperatures
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light load and pressure
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high pressure and load
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| 4. | Dye penetrant method is generally used to locate ? | |
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core defects
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surface defects
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superficial defects
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temporary defects
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| 5. | Cartidge brass can be ? | |
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cold rolled into sheets
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drawn into wires
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formed into tube
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any one of these
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| 6. | For the pipe fitting like elbow, tee, union etc., which of the following is preferred ? | |
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Pig iron
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Malleable iron
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Spheroidal graphite cast iron
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High carbon steel
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| 7. | The machinability of aluminium increases when .................. added to aluminium ? | |
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copper
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magnesium
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silicon
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lead and bismuth
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| 8. | Free carbon in iron makes the metal ? | |
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soft and gives a coarse grained crystalline structure
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soft and gives a fine grained crystalline structure
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hard and gives a coarse grained crystalline structure
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hard and gives a fine grained crystalline structure
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| 9. | Malleable cast iron is produced ? | |
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by adding magnesium to molten cast iron
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by quick cooling of molten cast iron
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from white cast iron by annealing process
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none of these
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| 10. | Vanadium when added to steel ? | |
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increases tensile strength
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decreases tensile strength
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raises critical temperature
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lowers critical temperature
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