McqMate
Chapters
| 1. |
By calcining and smelting iron ores, a crude and impure form of iron obtained is known as |
| A. | cast iron |
| B. | wrought iron |
| C. | steel |
| D. | pig iron |
| Answer» D. pig iron | |
| 2. |
The colour of cast iron is |
| A. | grey |
| B. | white |
| C. | both grey and white |
| D. | none of the above |
| Answer» C. both grey and white | |
| 3. |
The compressive and tensile strength of cast iron are |
| A. | 700 N/m2 and 150 N/mm2 |
| B. | 600 N/mm2 and 400 N/mm2 |
| C. | 415 N/mm2 and 415 N/mm2 |
| D. | 400 N/mm2 and 600 N/mm2 |
| Answer» A. 700 N/m2 and 150 N/mm2 | |
| 4. |
For making spiral staircases, ideal material is |
| A. | pig iron |
| B. | cast iron |
| C. | wrought iron |
| D. | steel |
| Answer» B. cast iron | |
| 5. |
Purest form of iron is |
| A. | pig iron |
| B. | cast iron |
| C. | wrought iron |
| D. | steel |
| Answer» C. wrought iron | |
| 6. |
Carbon content in wrought iron is |
| A. | 0.15% |
| B. | 0.25 to 1.5% |
| C. | 2 to 4% |
| D. | more than 4% |
| Answer» A. 0.15% | |
| 7. |
The ratio of tensile strength to compressive strength of steel is |
| A. | less than 1 |
| B. | equal to 1 |
| C. | more than 1 |
| D. | nothing can be said definitely |
| Answer» B. equal to 1 | |
| 8. |
Ribs are made on steel wires to increase |
| A. | strength is compression |
| B. | strength is tension |
| C. | bond strength |
| D. | fatigue quality |
| Answer» C. bond strength | |
| 9. |
The property of metal enabling it to be drawn into thin weir is known as |
| A. | malleability |
| B. | ductility |
| C. | toughness |
| D. | plasticity |
| Answer» B. ductility | |
| 10. |
Non-ferrous Materials |
| A. | Market form of copper is/are |
| B. | ingots |
| C. | sheets |
| D. | tubes |
| Answer» D. tubes | |
| 11. |
The ore from which aluminium is extracted economically is |
| A. | kaolin |
| B. | kryolite |
| C. | corundum |
| D. | bauxite |
| Answer» D. bauxite | |
Done Reading?