MCQOPTIONS
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MCQOPTIONS
This section includes 224 Mcqs, each offering curated multiple-choice questions to sharpen your Metallurgy knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Percentage of carbon is least in case of |
| A. | Pig iron |
| B. | Wrought iron |
| C. | Malleable iron |
| D. | Cast iron |
| E. | Steel |
| Answer» C. Malleable iron | |
| 2. |
Which of the following element has hexagonal close packed structure? |
| A. | Molybdenum |
| B. | Cadmium |
| C. | Chromium |
| D. | Lead |
| E. | Aluminium |
| Answer» C. Chromium | |
| 3. |
In Brinell hardness tester the load for aluminium is |
| A. | 1000 kg |
| B. | 500 kg |
| C. | 300 kg |
| D. | 100 kg |
| E. | 1500 kg |
| Answer» C. 300 kg | |
| 4. |
Annealing treatment is normally used for |
| A. | Forgings |
| B. | Cold worked sheets |
| C. | Wires |
| D. | Castings |
| E. | All of the above |
| Answer» F. | |
| 5. |
The chemical formula of cementite is |
| A. | FeC3 |
| B. | Fe2C3 |
| C. | FeC |
| D. | Fe3C2 |
| E. | Fe3C |
| Answer» F. | |
| 6. |
The net magnetic moment is zero is case of |
| A. | Ferromagnetic materials |
| B. | Ferrimagnetic materials |
| C. | Anti-ferromagnetic materials |
| D. | All of the above |
| E. | None of the above |
| Answer» D. All of the above | |
| 7. |
The nature of atomic bond found in diamond is |
| A. | Ionic |
| B. | Covalent |
| C. | Metallic |
| D. | Either of above |
| E. | None of the above |
| Answer» C. Metallic | |
| 8. |
Insufficient hardness after tempering may be due to |
| A. | tempering temperature too low |
| B. | tempering temperature too high |
| C. | oxidising atmosphere in the furnace |
| D. | Any of the above |
| E. | Low specific heat of quenching oil |
| Answer» C. oxidising atmosphere in the furnace | |
| 9. |
Which of the following is a non-destructive test? |
| A. | Tensile test |
| B. | Cupping test |
| C. | Charpy test |
| D. | X-ray test |
| E. | Izod Impact test |
| Answer» E. Izod Impact test | |
| 10. |
For each ton of pig iron produced in a blast furnace, the amount of ore used is approximately. |
| A. | 1 ton |
| B. | 13 tons |
| C. | 5 tons |
| D. | 2 tons |
| E. | 12.5 tons |
| Answer» E. 12.5 tons | |
| 11. |
Brass in an alloy of |
| A. | Copper and lead |
| B. | Copper and tin |
| C. | Copper and nickel |
| D. | Copper and aluminium |
| E. | Copper and zinc |
| Answer» F. | |
| 12. |
Cracks of a vertical nature and dark coloured fissures in a sample of hardened steel indicate that |
| A. | Steel has not been properly heated |
| B. | Steel has been burned |
| C. | Steel contains excessive alloying elements |
| D. | Steel has been properly hardened |
| E. | Steel has achieved maximum possible hardness in accordance with the carbon percentage |
| Answer» C. Steel contains excessive alloying elements | |
| 13. |
Volume of air required to melt one ton of cast iron in a cupola at N.T.P. is roughly |
| A. | 10000 cubic metres of air |
| B. | 10 cubic metres of air |
| C. | 100000 cubic metres of air |
| D. | 100 cubic metres of air |
| E. | 1000 cubic metres of air |
| Answer» E. 1000 cubic metres of air | |
| 14. |
A fine grained steel will have the number of grains per square centimeter as |
| A. | 100 to 150 |
| B. | 150 to 1000 |
| C. | 16 to 56 |
| D. | 3 to 16 |
| E. | 56 to 100 |
| Answer» E. 56 to 100 | |
| 15. |
A chisel for cutting steel plates is usually |
| A. | Hardened and tempered |
| B. | Annealed |
| C. | Hardened |
| D. | Tempered |
| E. | Tempered and annealed |
| Answer» B. Annealed | |
| 16. |
Uniformity of zinc coating on pipes is tested by |
| A. | Dipping the sample in water |
| B. | Dipping the sample for 10 minutes in calcium hydroxide solution |
| C. | Dipping the sample for 1 minute in conc, hydrochloric acid |
| D. | Dipping the sample for 1 minute in neutral copper sulphate solution |
| E. | By passing electric current for 1 hour |
| Answer» E. By passing electric current for 1 hour | |
| 17. |
Alpha brass is a (an) |
| A. | Inermediate phase |
| B. | Interstitial compound |
| C. | Substitutional solid solution |
| D. | None of the above |
| E. | 2.10% |
| Answer» D. None of the above | |
| 18. |
The process for steel making used at TISCO, Jamshedpur is |
| A. | Duplex process |
| B. | Open hearth process |
| C. | Bessemmer process |
| D. | L-D process |
| E. | Electric process |
| Answer» B. Open hearth process | |
| 19. |
Which of the following material can bear sudden and excessive shocks better? |
| A. | White iron |
| B. | Pig iron |
| C. | Wrought iron |
| D. | All have same shock bearing capacity |
| E. | Cast iron |
| Answer» D. All have same shock bearing capacity | |
| 20. |
Vicker's hardness number of diamond could be of the order of |
| A. | 8000 |
| B. | 800 |
| C. | 4000 |
| D. | 15000 |
| E. | 12000 |
| Answer» B. 800 | |
| 21. |
Which of the following material is viscoelastic in properties? |
| A. | Graphite |
| B. | Rubber |
| C. | Glass |
| D. | Cork |
| E. | None of the above |
| Answer» C. Glass | |
| 22. |
Brinell hardness of nitrided surface may be of the order of |
| A. | More than 600 |
| B. | 200 to 250 |
| C. | 300 to 450 |
| D. | 150 to 200 |
| E. | 100 |
| Answer» B. 200 to 250 | |
| 23. |
In Brinell hardness testing the minimum thickness of the specimen should be |
| A. | More than 10 times the depth of impression |
| B. | Less than 10 times the depth of impression |
| C. | Less than 5 times the depth of impression |
| D. | Thickness of specimen has no relevance to the depth of impression |
| E. | Equal to 10 times the depth of impression |
| Answer» B. Less than 10 times the depth of impression | |
| 24. |
The fastest cooling rate is achieved when steel is quenched in |
| A. | Brine |
| B. | Soldering |
| C. | Oil |
| D. | Water |
| E. | Air |
| Answer» B. Soldering | |
| 25. |
Which of the following material is generally not used as deoxidiser for producing killed steel? |
| A. | Copper |
| B. | Ferro-silicon |
| C. | Ferro-manganese |
| D. | Aluminium |
| E. | All of the above |
| Answer» B. Ferro-silicon | |
| 26. |
Ultimate tensile strength is least in case of mild steel and is of the order of |
| A. | 75 - 90 kg/mm2 |
| B. | 60 - 75 kg/mm2 |
| C. | 90 - 100 kg/mm2 |
| D. | 50 - 60 kg/mm2 |
| E. | 35 - 45 kg/mm2 |
| Answer» F. | |
| 27. |
In anti-ferromagnetic materials the spin moments associated with two sets of atoms are aligned |
| A. | Anti-parallel to each other |
| B. | Parallel to each other |
| C. | Random to each other |
| D. | Anti-parallel but of unequal magnitudes |
| E. | None of the above |
| Answer» B. Parallel to each other | |
| 28. |
Which of the following is not true for cementite? |
| A. | It has low melting point |
| B. | It is found is steels |
| C. | It is brilliantly white |
| D. | It is hard |
| E. | It is brittle |
| Answer» B. It is found is steels | |
| 29. |
Cast iron pipes are manufactured by |
| A. | Centrifugal casting method |
| B. | Die casting method |
| C. | Lost wax method |
| D. | Shell moulding method |
| E. | Sand acting method |
| Answer» B. Die casting method | |
| 30. |
Babbit metal is an alloy of |
| A. | Tin, copper and lead |
| B. | Tin, antimony and copper |
| C. | Tin, zinc and copper |
| D. | Tin, antimony and lead |
| E. | Lead, zinc and copper |
| Answer» C. Tin, zinc and copper | |
| 31. |
Which of the following is fluxing material for cupola? |
| A. | Limestone |
| B. | Fluorspar |
| C. | Soda Ash |
| D. | Any of the above |
| E. | None of the above |
| Answer» E. None of the above | |
| 32. |
Which of the following is closest to the purest form of iron |
| A. | Mild steel |
| B. | Pig iron |
| C. | Nodular cast iron |
| D. | Grey cast iron |
| E. | Wrought iron |
| Answer» F. | |
| 33. |
Quenching cracks during heat treatment can be minimised |
| A. | by avoiding sharp projections and sudden transitions from thick to thin sections |
| B. | articles should be free from stress before heat treatment |
| C. | heat to minimum stable temperature for hardening |
| D. | Any of the above |
| E. | Low specific heat of quenching oil |
| Answer» E. Low specific heat of quenching oil | |
| 34. |
The correct order of cooling media for decreasing cooling rate is |
| A. | Water, oil, fused alst, air |
| B. | Water, air, fused salt, oil |
| C. | Oil, fused salt, air, water |
| D. | Air, water, oil, fused salt |
| E. | Cast iron |
| Answer» B. Water, air, fused salt, oil | |
| 35. |
Constantan is an alloy containing |
| A. | Copper and nickel |
| B. | Lead and zinc |
| C. | Copper and zinc |
| D. | Zinc and nickel |
| E. | Lead and copper |
| Answer» B. Lead and zinc | |
| 36. |
In which of the following cases creep is an important consideration? |
| A. | Cast iron water pipes |
| B. | Cycle chains |
| C. | Gas turbine blades |
| D. | Steam engine flywheel |
| E. | All of the above |
| Answer» D. Steam engine flywheel | |
| 37. |
Hypoeutectoid steel has the structure of |
| A. | Cementite |
| B. | Pearlite |
| C. | Ferrite |
| D. | Ferrite & pearlite |
| E. | None of the above |
| Answer» E. None of the above | |
| 38. |
During burning of grain boundaries |
| A. | regions enriched in carbon are formed in first state of burning |
| B. | non-oxidized cavities and blow holes are formed during second stage |
| C. | iron oxide inclusions are formed in third stage |
| D. | All of the above |
| E. | Low specific heat of quenching oil |
| Answer» E. Low specific heat of quenching oil | |
| 39. |
Which of the following is by product from blast furnace? |
| A. | Slag |
| B. | Flue dust |
| C. | Blast furnace gas |
| D. | All of the above |
| E. | None of the above |
| Answer» E. None of the above | |
| 40. |
Eddy currents |
| A. | Increase with square of frequency |
| B. | Increase with fourth power of frequency |
| C. | Increase with frequency |
| D. | Increase as inverse of frequency |
| E. | Increase with cube of frequency |
| Answer» B. Increase with fourth power of frequency | |
| 41. |
Which of the following furnace is used for steel only? |
| A. | Indirect arc furnace |
| B. | Cupola |
| C. | Low specific heat of quenching oil |
| D. | Open hearth furnace |
| E. | Air furnace |
| Answer» E. Air furnace | |
| 42. |
Which of the following hardening process is generally used for non-ferous materials? |
| A. | Nitriding |
| B. | Age hardening |
| C. | Pack carburizing |
| D. | Cyaniding |
| E. | Flame hardening |
| Answer» C. Pack carburizing | |
| 43. |
For nitriding, the nitrogen is provided by |
| A. | Ionised air |
| B. | Heated air |
| C. | Nitric acid |
| D. | Ammonia |
| E. | Nitrous oxide |
| Answer» E. Nitrous oxide | |
| 44. |
Which of the following is easiest to bend? |
| A. | Grey pig iron |
| B. | Wrought iron |
| C. | Mottled pig iron |
| D. | Cast iron |
| E. | Steel |
| Answer» C. Mottled pig iron | |
| 45. |
The coordination number of NaCl is |
| A. | 2 |
| B. | 9 |
| C. | 8 |
| D. | 3 |
| E. | 6 |
| Answer» F. | |
| 46. |
For producing cast iron pipes by centrifugal casting method the core used is |
| A. | Wax core |
| B. | Clay core |
| C. | Metallic core |
| D. | Sand core |
| E. | No core is used |
| Answer» F. | |
| 47. |
Plasticisers are added to plastic compounds to |
| A. | Improve resistance to acids |
| B. | Provide a protective layer |
| C. | Improve resistance to alkalies |
| D. | Increase tensile strength |
| E. | Improve softness and flexibility |
| Answer» F. | |
| 48. |
The process of providing zinc coating on steel pipes is known as |
| A. | Cold working |
| B. | Pickling |
| C. | Galvanising |
| D. | Blistering |
| E. | Spheroidising |
| Answer» D. Blistering | |
| 49. |
Mild steel has the structure of |
| A. | BCC |
| B. | Cubic |
| C. | FCC |
| D. | HCC |
| E. | Orthorhombic |
| Answer» B. Cubic | |
| 50. |
Which of the following is not a hardening process? |
| A. | Nitriding |
| B. | Carburising |
| C. | Cyaniding |
| D. | Sphcroidizing |
| E. | Induction hardening |
| Answer» E. Induction hardening | |