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. |
Bainiti is a fine maxture of |
| A. | ferrite and cementite |
| B. | cementitie and peoitite |
| C. | pearlite and ferrite |
| D. | austenti and ferrite |
| E. | None of the above |
| Answer» B. cementitie and peoitite | |
| 2. |
The process of heating iron base alloys to approzimately 40?C above the critical temperature range followed by cooling to below that range in still air at ordinary temperature is known as |
| A. | Normalizing |
| B. | Tempering |
| C. | Hardening |
| D. | Spheroidizing |
| E. | Annealing |
| Answer» B. Tempering | |
| 3. |
Which of the following rays are neither deflected by electric field nor by magnetic field? |
| A. | ?-rays |
| B. | ?-rays |
| C. | ?-rays |
| D. | X-rays |
| E. | None of the above |
| Answer» D. X-rays | |
| 4. |
Nitriding is a process for |
| A. | Annealing |
| B. | Spheroidizing |
| C. | Case hardening |
| D. | Normalizing |
| E. | None of the above |
| Answer» D. Normalizing | |
| 5. |
In inverse rate curve |
| A. | The ordainate is temperature |
| B. | The abscissa is time |
| C. | The abscissa is temperature |
| D. | The ordinate is time |
| E. | The abscissa is carbon percentage |
| Answer» B. The abscissa is time | |
| 6. |
The process of shaping thin metals by pressing it against form while it is rotating is known as |
| A. | Pressing |
| B. | Extruding |
| C. | Bending |
| D. | Metal spinning |
| E. | Trimming |
| Answer» E. Trimming | |
| 7. |
Which of the following method cannot be used for thermoplastic materials? |
| A. | Extrusion |
| B. | Blow moulding |
| C. | Injection moulding |
| D. | All of the above |
| E. | None of the above |
| Answer» C. Injection moulding | |
| 8. |
Which of the following material can be used at temperatures above 100?C? |
| A. | Polythene |
| B. | Teflon |
| C. | Rubber |
| D. | Paraffin wax |
| E. | None of the above |
| Answer» C. Rubber | |
| 9. |
The process of austempering results in the formation of |
| A. | Carburized structure |
| B. | Martensitic structure |
| C. | Nitride structure |
| D. | Bainite structure |
| E. | Superhand structure |
| Answer» E. Superhand structure | |
| 10. |
Polyethylene is produced by |
| A. | Condensation polymerization |
| B. | Addition polymerization |
| C. | Colpolymerization of ethylene monomers |
| D. | None of the above |
| E. | Semi-conductors |
| Answer» C. Colpolymerization of ethylene monomers | |
| 11. |
Which of the following materials can be used for temperatures upto 500?C? |
| A. | Empire cloth |
| B. | Paper oiled |
| C. | Mica |
| D. | Polythene |
| E. | None of the above |
| Answer» D. Polythene | |
| 12. |
The resistivity of electrical conductors is most affected by |
| A. | Temperature |
| B. | Pressure or composition |
| C. | Composition |
| D. | Pressure |
| E. | Temperature and pressure |
| Answer» D. Pressure | |
| 13. |
The process of reheating hardened steel to temperature below the lower critical temperature followed by any desired rate of cooling, is known as |
| A. | Hardening |
| B. | Spheroidizing |
| C. | Annealing |
| D. | Tempering |
| E. | Normalizing |
| Answer» E. Normalizing | |
| 14. |
In drop forging the forging is done by |
| A. | Dropping the workpiece at high velocity |
| B. | Dropping the hammer at high velocity |
| C. | Dropping the die with hammer at high velocity |
| D. | Dropping a weight on hammer to produce requisite impact |
| E. | None of the above |
| Answer» D. Dropping a weight on hammer to produce requisite impact | |
| 15. |
In Brinell hardness tests if a soft ball is used for indentation |
| A. | The indentation will not eb circular |
| B. | It will not be possible to correctly measure the depth of indentation |
| C. | The surface of indentation will be rough |
| D. | The ball may deform |
| E. | None of the above |
| Answer» E. None of the above | |
| 16. |
The limitations of electroforming are |
| A. | Cost is high |
| B. | Production rate is generally very low |
| C. | Recesses can be easily formed |
| D. | (A) and (B) above |
| E. | (A) and (C) above |
| Answer» E. (A) and (C) above | |
| 17. |
Which of the following method can be used for thermoplastic materials? |
| A. | Blow moulding |
| B. | Casting |
| C. | Calendering |
| D. | Compression moulding |
| E. | None of the above |
| Answer» D. Compression moulding | |
| 18. |
Stress concentration occurs when |
| A. | A body is subjected to excessive stress |
| B. | A body is subjected to reversing stress |
| C. | A body is subjected to non-uniform stress distribution |
| D. | A body is subjected to fluctuating stress |
| E. | A body is subjected to unidirectional stress |
| Answer» D. A body is subjected to fluctuating stress | |
| 19. |
Brinell hardness number of mild steel should expected to be in the range be |
| A. | 150-300 |
| B. | 110-150 |
| C. | 20--50 |
| D. | 300-450 |
| E. | 10-110 |
| Answer» C. 20--50 | |
| 20. |
Isotropic materials have |
| A. | Same elastic properties in all directions |
| B. | Cannot take shear as well as tensile stress |
| C. | Variable thermal as well as electrical conductivity |
| D. | Different elastic properties in different directions |
| E. | Different compressive and tensile stresses at different locations in the same material |
| Answer» B. Cannot take shear as well as tensile stress | |
| 21. |
Silicon steel used for electrical purposes has silicon percentage of |
| A. | 3.40% |
| B. | 2.50% |
| C. | 13.40% |
| D. | 1.50% |
| E. | 0.50% |
| Answer» B. 2.50% | |
| 22. |
One of the objects of annealing is |
| A. | To refine grain structure |
| B. | To soften the metal |
| C. | to improve machinability |
| D. | All above |
| E. | To refine internal stresses |
| Answer» E. To refine internal stresses | |
| 23. |
Ductility of material may be defined as |
| A. | Ability to undergo temporary deformation in tension |
| B. | Capacity to withstand combined tensile and shear forces |
| C. | Ability to undergo large permanent deformations in tension |
| D. | Capacity to withstand reversal of stresses |
| E. | Capacity to resist deformation under pressure |
| Answer» D. Capacity to withstand reversal of stresses | |
| 24. |
In which of the following case creep is an important consideration? |
| A. | Piston of an air compressor |
| B. | Exhaust valve of a diesel engine |
| C. | Blades of a steam turbine |
| D. | Flywheel of a petrol engine |
| E. | Shaft of a centrifugal compressor |
| Answer» D. Flywheel of a petrol engine | |
| 25. |
Which of the following pipe will corrode easily? |
| A. | Stainless steel pipe |
| B. | GI pipe |
| C. | ERW pipe |
| D. | Copper pipe |
| E. | Lead pipe |
| Answer» D. Copper pipe | |
| 26. |
The Miller indices of the diagonal plane of a cube are |
| A. | 100 |
| B. | 0 |
| C. | 10 |
| D. | 110 |
| E. | 111 |
| Answer» E. 111 | |
| 27. |
The process by which a steel ingot is converted into a sheet is known as |
| A. | Rolling process |
| B. | Routing process |
| C. | Re-rolling process |
| D. | Machining process |
| E. | Forging process |
| Answer» B. Routing process | |
| 28. |
Eutectic is |
| A. | a phase transformation in which all the liquid phase transforms on cooling to two solid phases simultaneously |
| B. | A phase transformation which occurs above the glass transition temperature |
| C. | a solid solution of one component in another |
| D. | None of the above |
| E. | None of the above |
| Answer» B. A phase transformation which occurs above the glass transition temperature | |
| 29. |
Malleal lity of a material is defined as |
| A. | Ability to withstand compressive stresses |
| B. | Ability to withstand deformation under shear |
| C. | Ability to undergo large permanent deformation in compression |
| D. | The property by which a material can be cold worked |
| E. | None of the above |
| Answer» D. The property by which a material can be cold worked | |
| 30. |
Polysterene is |
| A. | An alkyl halide |
| B. | A hydrocarbon |
| C. | An ester |
| D. | An alcohol |
| E. | Semi-conductors |
| Answer» C. An ester | |
| 31. |
Which of the following polymer is crystalline? |
| A. | Semi-conductors |
| B. | Polyvinylidene chloride |
| C. | Polyvinyl chloride |
| D. | Polyethylene |
| E. | Polymethyl metacrylate |
| Answer» E. Polymethyl metacrylate | |
| 32. |
Which of the following is incorrect for diamond? |
| A. | Transparent |
| B. | Densest form of carbon |
| C. | White in colour |
| D. | Insoluble in all solvents |
| E. | An allotrope of graphite |
| Answer» C. White in colour | |
| 33. |
The primary purpose of annealing is to |
| A. | Restrict the hardness of steel |
| B. | Soften the steel for machining after cold working |
| C. | Reduce carbon percentage |
| D. | Change the crystalline structure |
| E. | None of the above |
| Answer» C. Reduce carbon percentage | |
| 34. |
Identify the correct relation |
| A. | Mass number - Atomic number = Number of neutrons |
| B. | Mass number - Atomic number = Number of protons |
| C. | Number of neutrons - Number of protons = Mass number |
| D. | Number of electrons outside the nucleus - Number of proton = Mass number |
| E. | None of the above |
| Answer» B. Mass number - Atomic number = Number of protons | |
| 35. |
Which of the following aluminium alloy is commonly used for utensils? |
| A. | Babbit alloy |
| B. | Hindalium |
| C. | Magnalium |
| D. | Duralumin |
| E. | Y-alloy |
| Answer» C. Magnalium | |
| 36. |
A solution of NaOH conducts electricity bcause NaOH is |
| A. | A dielectric |
| B. | A non-electrolyte |
| C. | A strong electrolyte |
| D. | A week electrolyte |
| E. | None of the above |
| Answer» D. A week electrolyte | |
| 37. |
The behavious of visco-elastic material is |
| A. | Time dependent |
| B. | Independent of time |
| C. | Plastic |
| D. | Elastic |
| E. | Ductile |
| Answer» E. Ductile | |
| 38. |
Brinell hardness number for soft brass is usually in the range |
| A. | 300-450 |
| B. | 50-70 |
| C. | 10--50 |
| D. | 80-150 |
| E. | 150-300 |
| Answer» C. 10--50 | |
| 39. |
Identify the incorrect statement, if any |
| A. | Dislocations in real crystals are generally straight lines which are generally in same plane |
| B. | Dislocations in real crystals are rarely straight lines and rarely lie in a single plane |
| C. | A dislocation is the linear lattice defect that is responsible for nearly all aspects of the plastic deformation of metals |
| D. | The strain field at the dislocation results in a different intensity |
| E. | The strain field at the dislocation results in a different intensity |
| Answer» B. Dislocations in real crystals are rarely straight lines and rarely lie in a single plane | |
| 40. |
Compressve strength of wood is usually |
| A. | Zinc |
| B. | Maximum at 45? to the direction of grains |
| C. | More along the grains |
| D. | Equal in all directions |
| E. | More across the grains |
| Answer» D. Equal in all directions | |
| 41. |
The intensity of magnetisation M of a ferromagnetic solid |
| A. | is independent of temperature |
| B. | increases with increasing temperature |
| C. | decreases with increasing temperature |
| D. | depends primarily on method of heating |
| E. | None of the above |
| Answer» D. depends primarily on method of heating | |
| 42. |
Steel with 0.8% carbon and 100% pearlite is called |
| A. | Eutectoid |
| B. | Hyper-eutectoid |
| C. | Austenite |
| D. | Solid's |
| E. | None of the above |
| Answer» B. Hyper-eutectoid | |
| 43. |
Fatigue cracks in metals normally start at |
| A. | Centre of the specimen |
| B. | Surface of the specimen |
| C. | Any spot in the specimen |
| D. | Ends of the specimen |
| E. | Core of the specimen |
| Answer» C. Any spot in the specimen | |
| 44. |
Neoprene is |
| A. | Rubber |
| B. | Plastic |
| C. | Rubber like plastic |
| D. | None of the above |
| E. | Semi-conductors |
| Answer» D. None of the above | |
| 45. |
Steel cannot be hardened unless it is heated |
| A. | Between the first and second critical point |
| B. | Above the middle critical point |
| C. | Above the lowest critical point |
| D. | Above the highest critical point |
| E. | Between the second and third critical point |
| Answer» D. Above the highest critical point | |
| 46. |
Age hardening is related with |
| A. | Stainless steel |
| B. | Cast iron |
| C. | Gun metal |
| D. | Duralumin |
| E. | German silver |
| Answer» B. Cast iron | |
| 47. |
Silicon doped with gallium is |
| A. | intrinsic semi-conductor |
| B. | extrinsic semi-conductor |
| C. | p-type semi-conductor |
| D. | n-type semi-conductor |
| E. | None of the above |
| Answer» D. n-type semi-conductor | |
| 48. |
The crystal structure of a material can be studied by |
| A. | Electron microscope |
| B. | X-ray difraction |
| C. | Electron probe X-ray microanalyser |
| D. | All of the above |
| E. | Semi-conductors |
| Answer» C. Electron probe X-ray microanalyser | |
| 49. |
In pack-carburising carbon is supplied |
| A. | In the form of charcoal |
| B. | Through gas |
| C. | In the form of hydrocarbons |
| D. | In the form of calcium carbide |
| E. | In the form of graphite |
| Answer» B. Through gas | |
| 50. |
The fatigue strength of materials increases |
| A. | By over stressing the specimen |
| B. | With temperature |
| C. | By having notches in specimen |
| D. | By having scratch on the surface |
| E. | By under stressing the specimen |
| Answer» F. | |