Metals and Alloys MCQ Questions and Answers for Practice

1. % C in medium carbon steels ranges from ...............

1. 0.3 - 0.6
2. None
3. 0.3 - 0.4
4. 0.3 - 0.5

2. Stainless steel is so called because of its................

1. High ductility
2. Brittleness
3. High strength
4. High corrosion resistance

3. In white cast irons, carbon present as...................

1. Cementite
2. Carbon does not exist
3. Graphite flakes
4. Graphite nodules

4. Refractory metal

1. Pt
2. Ni
3. Ag
4. W

5. Not a noble meta

1. Au
2. Pt
3. Cu
4. Ag

6. Noble metal

1. Mo
2. W
3. Al
4. Ag

7. Usual casting method for making dental crowns

1. Continuous casting
2. Investment casting
3. Sand casting
4. Die casting

8. Prime structural disadvantage of P/M products

1. High damping capacity
2. None
3. Low density
4. Porosity

9. Not an important heat treatment process parameter

1. Cooling rate
2. Atmosphere
3. Heating rate
4. Temperature

10. Final structure of austempered steel

1. Bainite
2. Martensite
3. Pearlite
4. Ferrite + graphite