Materials and Construction Questions And Answers.
Exercise ::
Materials and Construction
| 1. | Pick�out�the�wrong�statement? |
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| A. | The toughness of a material decreases, when it is heated |
| B. | Crane hooks are normally made of wrought iron |
| C. | Cold working of a metal decreases its fatigue strength |
| D. | The temperature at which new grains are formed in a metal is known as the recrystallisation temperature |
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Published by:Michael Daani
| 2. | Pick�out�the�wrong�statement? |
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| A. | Pure rubber is as useless as pure gold as a material of construction |
| B. | Thermal conductivity of aluminium is higher than that of copper; hence it is increasingly used for utensil making |
| C. | Copper has poor weldability |
| D. | Reinforced plastics are made from both thermoplastic as well as thermosetting plastics |
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Published by:Michael Daani
| 3. | Pick�out�the�wrong�statement? |
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| A. | Wrought iron contains about 0.02% carbon |
| B. | Wrought iron cannot be easily forged and welded |
| C. | The chilled cast iron does not contain graphite |
| D. | Spheroidal grey cast iron contains graphite flakes |
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Published by:Michael Daani
| 4. | Pick�out�the�correct�statement? |
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| A. | Stainless steel is nothing but chromium coated steel |
| B. | Hardening of a soft metal can be done by alloying it with another metal or non-metal |
| C. | Plastic deformation of a material is its temporary distortion under the action of applied stress |
| D. | Rusting of iron is not electrochemical in nature |
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Published by:Michael Daani
| 5. | Pick�out�the�wrong�statemen? |
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| A. | Hardening makes the steel more brittle |
| B. | High alloy steels contain more than 50% alloying element |
| C. | 18/8 stainless steel is a magnetic steel |
| D. | Both B. and C. |
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Published by:Michael Daani
