MCQOPTIONS
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MCQOPTIONS
This section includes 657 Mcqs, each offering curated multiple-choice questions to sharpen your Testing Subject knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Coarse grained steels |
| A. | Do not have tendency to distort |
| B. | Are less tough |
| C. | Are very tough |
| D. | Are lighter |
| E. | Are denser |
| Answer» C. Are very tough | |
| 2. |
During stress relaxation phenomenon |
| A. | Deformation tends to bind the joint and produces a stress reduction |
| B. | Deformation tends to loosen the joint and produces a stress reduction |
| C. | Stress is no longer proportional to strain |
| D. | Stress reduces on increasing load |
| E. | None of the above |
| Answer» F. | |
| 3. |
Polymers |
| A. | Semi-conductors |
| B. | Can be vaporised but cannot be recycled |
| C. | Can be recycled but cannot be vaporised |
| D. | Can be vaporised as well as recycled |
| E. | Can neither be vaporised nor recycled |
| Answer» F. | |
| 4. |
Any process of heating and cooling steel that produces a rounded or globular from of carbide is known as |
| A. | Spheroidizing |
| B. | Drawing |
| C. | Nomalizing |
| D. | Nitriding |
| E. | Ultra hardening |
| Answer» B. Drawing | |
| 5. |
Which of the following is a fuel used in fast reactors? |
| A. | Chromium |
| B. | Plutonium |
| C. | Zirconium |
| D. | Heavy water |
| E. | Graphite |
| Answer» C. Zirconium | |
| 6. |
Which of the following is the ductile material? |
| A. | Aluminium |
| B. | Zinc |
| C. | Brass |
| D. | Silver |
| E. | Stainless steel |
| Answer» E. Stainless steel | |
| 7. |
Spot the process which is different from others? |
| A. | Galvanizing |
| B. | Chapmanizing |
| C. | Carburizing |
| D. | Cyaniding |
| E. | Nitriding |
| Answer» B. Chapmanizing | |
| 8. |
A bot in cupola is |
| A. | A part of coupla |
| B. | A defect in casting |
| C. | A kind of cast iron |
| D. | A flux |
| E. | A clay plug to close tap hole |
| Answer» B. A defect in casting | |
| 9. |
Recrystallistion temperature is one |
| A. | At which change of allotropic form takes place. |
| B. | At which crystals start growing in size |
| C. | At which new spherical crystals first begin to form from the old deformed ones when a strained metal is heated |
| D. | At which polycrystalline changes occur |
| E. | At which crystals again begin to appear |
| Answer» D. At which polycrystalline changes occur | |
| 10. |
The Curic point for Rochelle salt is about |
| A. | 1000?C |
| B. | 500?C |
| C. | 240?C |
| D. | Absolute zero |
| E. | None of the above |
| Answer» D. Absolute zero | |
| 11. |
The main constituent of glass is |
| A. | B2O3 |
| B. | Al2O3 |
| C. | Semi-conductors |
| D. | CaCO3 |
| E. | SiO2 |
| Answer» F. | |
| 12. |
Accounstical materials |
| A. | Isentropic material |
| B. | Create sound |
| C. | Absorb sound |
| D. | Reflect sound |
| Answer» E. | |
| 13. |
Ferri-magnetic materials generally find application as |
| A. | conductors |
| B. | insulators |
| C. | resistors |
| D. | semi-conductors |
| E. | None of the above |
| Answer» E. None of the above | |
| 14. |
Hot tear |
| A. | Is a defect in castings |
| B. | Is a process involving heating |
| C. | Is a defect in wood |
| D. | Is a phenomenon occurring in materials ixposed to weather e.g. sun and rain |
| E. | Is a physical property of non-ferrous materials |
| Answer» B. Is a process involving heating | |
| 15. |
Super conductors |
| A. | Exist at temperatures below 10?K |
| B. | Are non-crystalline |
| C. | Are non-metallic substances |
| D. | Are the purest forms of metals |
| E. | Are the density metals without voids |
| Answer» B. Are non-crystalline | |
| 16. |
In case of biaxial stress system when a member is subjected to tensile stresses in two perpendicular directions the maximum shear stress in case of mild steel occurs on a plane inclined at |
| A. | 22 |
| B. | 90? |
| C. | 30? |
| D. | 0? |
| E. | 45? |
| Answer» F. | |
| 17. |
Just as strong is opposite to weak, similarly brittle is opposite to |
| A. | Tough |
| B. | Rigid |
| C. | Elastic |
| D. | Soft |
| E. | Hard |
| Answer» B. Rigid | |
| 18. |
When a loop composed of two dissimilar metals could be made to carry a continuous current simply by maintaining the two junctions at different temperatures, the above effect is known as |
| A. | Thomson effect |
| B. | Thompson effect |
| C. | Peltier effect |
| D. | Seeback effect |
| E. | None of the above |
| Answer» E. None of the above | |
| 19. |
In press work the dies which combine two or more operations at one station are known as |
| A. | Progressive dies |
| B. | Die and punch |
| C. | Simple dies |
| D. | Compound dies |
| E. | Press |
| Answer» E. Press | |
| 20. |
The amount of cold work that a metal will stand is dependent upon |
| A. | Room temperature |
| B. | Carbon percentage |
| C. | Ductility |
| D. | Purity of metal |
| E. | Process |
| Answer» D. Purity of metal | |
| 21. |
Carburizing is done |
| A. | By heating 200?C below critical temperature |
| B. | On steels with carbon percentage of 0.5% |
| C. | To induce soft surface for machining on a hard core |
| D. | To improve hardenability of steel |
| E. | On steel with carbon percentage of 0.7% |
| Answer» C. To induce soft surface for machining on a hard core | |
| 22. |
Viscoelastic materials show behaviour which is |
| A. | Elastic |
| B. | Inelastic |
| C. | Independent of time |
| D. | Plastic |
| E. | Time dependent |
| Answer» F. | |
| 23. |
Hastalloy consists of |
| A. | Copper and aluminium |
| B. | Nickel and molybdenum |
| C. | Aluminium and nickel |
| D. | Nickel and copper |
| E. | Nickel, copper and aluminium |
| Answer» C. Aluminium and nickel | |
| 24. |
The hardness of steel depends on |
| A. | Heating temperature before quenching |
| B. | The shape and distribution of carbides in iron |
| C. | Amount of carbon it contains |
| D. | Basic process from which it is produced |
| E. | Percentage of alloying elements |
| Answer» C. Amount of carbon it contains | |
| 25. |
Boring is generally |
| A. | Followed by reaming |
| B. | Preceded by reaming |
| C. | Followed by drilling |
| D. | Preceded by drilling |
| E. | None of the above |
| Answer» E. None of the above | |
| 26. |
A material with unequal anti-parallel atomic magnetic moments is |
| A. | an anti-ferromagnetic |
| B. | ferrimagnetic |
| C. | ferrite |
| D. | non-magnetic |
| E. | None of the above |
| Answer» B. ferrimagnetic | |
| 27. |
Visco-elastic behaviour is common in |
| A. | Crystalline materials |
| B. | Non-crystalline solids |
| C. | Plastics |
| D. | Rubber |
| E. | Non-crystalline organic polymers |
| Answer» B. Non-crystalline solids | |
| 28. |
In Brinell hardness testing, while determining hardness of aluminium |
| A. | Indenting ball of smaller diameter is used |
| B. | Time of loading is reduced |
| C. | Load on the indenter is reduced |
| D. | Plastic |
| Answer» D. Plastic | |
| 29. |
The technique of converting metallic powders into articles of definite form is known as |
| A. | High pressure pressing |
| B. | Carbiding |
| C. | Powder metallurgy |
| D. | Plasticizing |
| E. | None of the above |
| Answer» D. Plasticizing | |
| 30. |
Which of the following is not a semi-conductor? |
| A. | Silicon |
| B. | Tetraethyl lead |
| C. | Gallium Arsenide |
| D. | Germanium |
| E. | All of the above |
| Answer» C. Gallium Arsenide | |
| 31. |
A piezo electric is |
| A. | a material which become polarised when stressed |
| B. | a material which changes dimension due to applied field |
| C. | a material that never gets polarised |
| D. | a material in which magnetising force reduces when current flowing is increased |
| E. | None of the above |
| Answer» B. a material which changes dimension due to applied field | |
| 32. |
The structure of a semi-conductor resemles that of a |
| A. | circle |
| B. | rhombus |
| C. | diamond |
| D. | triangle |
| E. | None of the above |
| Answer» D. triangle | |
| 33. |
Aluminium alloys for pressure die casting |
| A. | Must possess considerable fluidity |
| B. | Must not be free from hot shortness |
| C. | Must have iron as one of the constituents |
| D. | Must be light |
| E. | None of the above |
| Answer» B. Must not be free from hot shortness | |
| 34. |
The strength of timber is |
| A. | less along the grains more across the grains |
| B. | more along the grains less across the grains |
| C. | same in all directions |
| D. | maximum in a direction at 45? to the longitudinal axis |
| E. | None of the above |
| Answer» C. same in all directions | |
| 35. |
Which of the following is 'acceptor' impurity for semi-conductor? |
| A. | Arsenic |
| B. | Phosphorous |
| C. | Boron |
| D. | Antimony |
| E. | All of the above |
| Answer» D. Antimony | |
| 36. |
If a body has identical properties all over it is known as |
| A. | Ductile |
| B. | Isentropic |
| C. | Plastic |
| D. | Elastic |
| E. | Homogeneous |
| Answer» F. | |
| 37. |
The semi-conductors have electrical conductivities of the following order (ohm-cm-1) |
| A. | 10?20 |
| B. | 10?15 |
| C. | 10?3 |
| D. | None of the above |
| Answer» D. None of the above | |
| 38. |
Which of the following is donor impurity for semi-conductors? |
| A. | Boron |
| B. | Callium |
| C. | Antimony |
| D. | Indium |
| E. | Aluminium |
| Answer» D. Indium | |
| 39. |
When the temperature of a semi-conductor is reduced to absolute zero |
| A. | all electrons become free |
| B. | electrons move at higher velocities |
| C. | all valence electrons remain in the valence bond |
| D. | all valence electrons shift to forbidden gap |
| E. | None of the above |
| Answer» D. all valence electrons shift to forbidden gap | |
| 40. |
Which type of electron pair exists in a semi-conductor? |
| A. | Ionic |
| B. | Non-ionic |
| C. | Homopolr |
| D. | Hetropolar |
| E. | None of the above |
| Answer» D. Hetropolar | |
| 41. |
Which of the following is p-type semi-conductor? |
| A. | Selenium |
| B. | Silicon doped with phosphorous |
| C. | Silicon doped with gallium |
| D. | All of the above |
| E. | None of the above |
| Answer» D. All of the above | |
| 42. |
Muntz metal contains |
| A. | Copper-tin |
| B. | Copper-chromium |
| C. | Copper-nickel |
| D. | Copper-zinc |
| E. | Copper-alminium |
| Answer» E. Copper-alminium | |
| 43. |
The number of semi-conductors in periodic table is |
| A. | 3 |
| B. | 5 |
| C. | 7 |
| D. | 13 |
| E. | None of the above |
| Answer» E. None of the above | |
| 44. |
The process of adding impurity to a semi-conductor material is called |
| A. | Grouping |
| B. | Mixing |
| C. | Doping |
| D. | Binding |
| E. | Film deposition |
| Answer» D. Binding | |
| 45. |
The elastic limit of cast iron is |
| A. | Close to ultimate breaking strength |
| B. | High |
| C. | Same as that of mild steel |
| D. | Low |
| E. | Low compression strength |
| Answer» B. High | |
| 46. |
In iron-iron carbide diagram the |
| A. | Abscissa is time |
| B. | Abscissa is temperature |
| C. | Abscissa is carbon percentage |
| D. | Ordinate is time |
| E. | None of the above |
| Answer» D. Ordinate is time | |
| 47. |
The specific gravity of cast iron is closer to |
| A. | 11 |
| B. | 9 |
| C. | 7 |
| D. | 5 |
| E. | 3 |
| Answer» D. 5 | |
| 48. |
Ferromagnetic alpha iron change to paramagnetic alpha iron at |
| A. | 1500?C |
| B. | 910?C |
| C. | 77?C |
| D. | 1400?C |
| E. | 1650?C |
| Answer» D. 1400?C | |
| 49. |
The properties of cast iron are regulated by |
| A. | Heat treatment |
| B. | Percentage of carbon present |
| C. | Heating temperature |
| D. | The composition of raw material |
| E. | Control of amount, type, size and distribution of various carbon formations |
| Answer» F. | |
| 50. |
Cast iron contains |
| A. | 0.2 to 0.4% carbon |
| B. | 0.4% to 0.7% carbon |
| C. | 1 to 1.3% carbon |
| D. | 2 to 4% carbon |
| E. | None of the above |
| Answer» E. None of the above | |