MCQOPTIONS
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MCQOPTIONS
This section includes 36 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering Materials Metallurgy knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The boiling point of copper is __________ |
| A. | 3287°C |
| B. | 2470°C |
| C. | 2562°C |
| D. | 1687°C |
| Answer» D. 1687°C | |
| 2. |
Copper is corrosion ___________ |
| A. | prone |
| B. | generator |
| C. | susceptible |
| D. | resistant |
| Answer» E. | |
| 3. |
Copper is a ____________ of electricity. |
| A. | bad conductor |
| B. | good conductor |
| C. | typical insulator |
| D. | medium conductor |
| Answer» C. typical insulator | |
| 4. |
Cuprite is an ore of copper. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 5. |
Copper is ductile in nature. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 6. |
The density of copper is _________ |
| A. | 4.506 gram per cubic centimetre |
| B. | 2.7 gram per cubic centimetre |
| C. | 9.9 gram per cubic centimetre |
| D. | 8.9 gram per cubic centimetre |
| Answer» E. | |
| 7. |
Copper is frequently alloyed with __________ |
| A. | zinc |
| B. | aluminium |
| C. | helium |
| D. | vanadium |
| Answer» B. aluminium | |
| 8. |
The melting point of copper is __________ |
| A. | 1668°C |
| B. | 660°C |
| C. | 1085°C |
| D. | 2228°C |
| Answer» D. 2228°C | |
| 9. |
___________ and ___________ are ores of copper. |
| A. | Dolomite, bornite |
| B. | Bornite, chalcopyrite |
| C. | Chalcopyrite, dolomite |
| D. | Bornite, magnesite |
| Answer» C. Chalcopyrite, dolomite | |
| 10. |
Copper is ____________ and ____________ |
| A. | soft, malleable |
| B. | soft, hard |
| C. | brittle, malleable |
| D. | hard, malleable |
| Answer» B. soft, hard | |
| 11. |
The ultimate tensile strength of soft copper is __________ |
| A. | 63000 psi |
| B. | 45000 psi |
| C. | 29000 psi |
| D. | 50000 psi |
| Answer» D. 50000 psi | |
| 12. |
The atomic number of copper is ___________ |
| A. | 11 |
| B. | 13 |
| C. | 29 |
| D. | 4 |
| Answer» D. 4 | |
| 13. |
Copper is a __________ element. |
| A. | magnetic |
| B. | dull |
| C. | neuro-magnetic |
| D. | non-magnetic |
| Answer» E. | |
| 14. |
Iron needs higher temperature ranges for its extraction. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 15. |
Copper alloys are mostly hot treated? |
| A. | True |
| B. | False |
| Answer» C. | |
| 16. |
What is the tensile strength of pure annealed copper? |
| A. | 324 MPa |
| B. | 676 MPa |
| C. | 759 MPa |
| D. | 209 MPa |
| Answer» E. | |
| 17. |
What is the tensile strength of cast manganese bronze? |
| A. | 490 MPa |
| B. | 759 MPa |
| C. | 676 MPa |
| D. | 324 MPa |
| Answer» B. 759 MPa | |
| 18. |
Which of the following materials, on adding with copper, doesn’t increase its strength? |
| A. | Cadmium |
| B. | Silver |
| C. | Sodium |
| D. | Aluminium Oxide |
| Answer» D. Aluminium Oxide | |
| 19. |
What amount of impurity is allowed for copper to be used in electric applications? |
| A. | 0.1% |
| B. | 0.2% |
| C. | 0.3% |
| D. | 0.4% |
| Answer» B. 0.2% | |
| 20. |
Which colour is obtained by copper alloys, when nickel is added to it? |
| A. | Red |
| B. | Blue |
| C. | Silver |
| D. | Yellow |
| Answer» D. Yellow | |
| 21. |
Which colour is obtained by copper alloys, when zinc is added to it? |
| A. | Red |
| B. | Blue |
| C. | Silver |
| D. | Yellow |
| Answer» E. | |
| 22. |
What is the density of copper alloys? |
| A. | 6.67 g/cc |
| B. | 7.87 g/cc |
| C. | 8.93 g/cc |
| D. | 5.77 g/cc |
| Answer» D. 5.77 g/cc | |
| 23. |
What is the general density of steel? |
| A. | 6.67 g/cc |
| B. | 7.87 g/cc |
| C. | 8.77 g/cc |
| D. | 5.77 g/cc |
| Answer» C. 8.77 g/cc | |
| 24. |
YELLOW_METAL_IS_MORE_COMMONLY_KNOWN_AS_______?$ |
| A. | Cartridge brass |
| B. | Naval brass |
| C. | Admiralty brass |
| D. | Muntz metal |
| Answer» E. | |
| 25. |
________IS_AN_ALLOY_OF_COPPER_AND_TIN.?$ |
| A. | Brass |
| B. | Bronze |
| C. | Gunmetal |
| D. | Cupro-nickel |
| Answer» C. Gunmetal | |
| 26. |
Which brass alloy is used to make imitation jewelry and decorative work?$ |
| A. | Standard brass |
| B. | Admiralty brass |
| C. | Free cutting brass |
| D. | Gilding metal |
| Answer» E. | |
| 27. |
Which brass alloy has a high tensile strength and can be used for cast molding?$ |
| A. | Manganese brass |
| B. | Free cutting brass |
| C. | Standard brass |
| D. | Gilding metal |
| Answer» B. Free cutting brass | |
| 28. |
Which brass alloy is suitable for high-speed machining? |
| A. | Gilding metal |
| B. | High tensile brass |
| C. | Leaded brass |
| D. | Muntz metal |
| Answer» D. Muntz metal | |
| 29. |
Addition of tellurium to copper results in _______? |
| A. | High strength |
| B. | Decreased electrical conductivity |
| C. | Increased machinability |
| D. | No effect |
| Answer» D. No effect | |
| 30. |
What is the appearance of copper? |
| A. | Gold |
| B. | Blue |
| C. | Yellow-green |
| D. | Red-orange |
| Answer» E. | |
| 31. |
α brasses contain ______ of zinc$ |
| A. | 0% |
| B. | <=36% |
| C. | >36% |
| D. | 100% |
| Answer» C. >36% | |
| 32. |
Brass is an alloy of copper and ______ |
| A. | Zinc |
| B. | Tin |
| C. | Tin and zinc |
| D. | Nickel |
| Answer» B. Tin | |
| 33. |
What is the melting point of Copper? |
| A. | 419 |
| B. | 600 |
| C. | 1084 |
| D. | 2562 |
| Answer» D. 2562 | |
| 34. |
Which copper grade is used to manufacture semiconductors and particle accelerator components? |
| A. | High conductivity copper |
| B. | Deoxidised copper |
| C. | Oxygen-free copper |
| D. | Arsenic deoxidized copper |
| Answer» D. Arsenic deoxidized copper | |
| 35. |
High conductivity copper is used ______ |
| A. | In electrical engineering |
| B. | To reduce porosity |
| C. | To raise softening temperature |
| D. | To manufacture semiconductor elements |
| Answer» B. To reduce porosity | |
| 36. |
How much copper is present in deoxidized copper? |
| A. | > 99.9% |
| B. | > 99.85% |
| C. | > 99.5% |
| D. | > 99.35% |
| Answer» C. > 99.5% | |