cameroon gce intermediate level material science and processes 1
cameroon gce intermediate level material science and processes 1
Which of the following designation is not correct ?
| A | En-GJL 400-80 |
| B | A1 Si5 Cu3 |
| C | X 6 Cr Ni Ti 10-08 |
| D | 20 Ni Cr W 04-18 |
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2. Select the most suitable process of production of
pieces with cast iron.
| A | Bending |
| B | Sheet metal |
| C | Sand casting |
| D | Hot forging |
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3. The lowest critical point of all steels is
| A | 600oC |
| B | 700oC |
| C | 913oC |
| D | 723oC |
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4. The hardness of a steel increases if it contains
| A | Cementile |
| B | Ferrite |
| C | Austenite |
| D | Pearlite |
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5. Bronze is an alloy made from
| A | Copper and tin |
| B | Copper and nickel |
| C | Copper and chromium |
| D | Copper and zinc |
