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. |
Tensile strength of common varieties of cast iron is in the range |
| A. | 40 - 50 M Pa |
| B. | 50 - 80 M Pa |
| C. | 500 - 650 M Pa |
| D. | 650 - 1000 M Pa |
| E. | 140 - 500 M Pa |
| Answer» F. | |
| 2. |
Cast iron containing 6.6% carbon is |
| A. | Black in colour containing only pearlite |
| B. | Black in colour containing only ferrite |
| C. | Gray in colour containing pearite and ferrite only |
| D. | Whitish containing cementite only |
| E. | None of the above |
| Answer» E. None of the above | |
| 3. |
The consitituent which has a powerful softening effect on cast iron and its presence in cast iron reduces the ability of the iron to retain carbon in chemical combination, is |
| A. | Silicon |
| B. | Carbon |
| C. | Sulphur |
| D. | Aluminium |
| E. | Chromium |
| Answer» B. Carbon | |
| 4. |
Which of the following metals has high tendency to get work hardened? |
| A. | Lead |
| B. | Silver |
| C. | Brass |
| D. | Aluminium |
| E. | Copper |
| Answer» D. Aluminium | |
| 5. |
The cast iron has |
| A. | High ductility |
| B. | High malleability |
| C. | High tensile strength |
| D. | Elastic limit close to ultimate breaking strength |
| E. | None of the above |
| Answer» D. Elastic limit close to ultimate breaking strength | |
| 6. |
Which of the following colour of light has the least wavelength? |
| A. | Violet |
| B. | Green |
| C. | Blue |
| D. | Orange |
| E. | Red |
| Answer» B. Green | |
| 7. |
Which of the following material has highest specific gravity? |
| A. | High carbon steel |
| B. | Copper |
| C. | Brass |
| D. | Lead |
| E. | Aluminium |
| Answer» E. Aluminium | |
| 8. |
Which of the following properties has lower value for copper as compared to aluminium? |
| A. | Specific gravity |
| B. | Melting point |
| C. | Electrical resistivity |
| D. | All of the above |
| E. | None of the above |
| Answer» D. All of the above | |
| 9. |
Which of the following material has least coefficient of expansion? |
| A. | Dead mild steel |
| B. | Brass |
| C. | Manganin |
| D. | Y-alloy |
| E. | Invar |
| Answer» F. | |
| 10. |
Which of the following ray has least wavelength? |
| A. | Yellow light rays |
| B. | Ultraviolet rays |
| C. | X-rays |
| D. | Cosmic rays |
| E. | Infra-red rays |
| Answer» E. Infra-red rays | |
| 11. |
The process of reheating the hardened steel to some temperature below the critical range, followed by any rate of cooling is known as |
| A. | Spheroidising |
| B. | Normalising |
| C. | Tempering |
| D. | Annealing |
| E. | Austempering |
| Answer» D. Annealing | |
| 12. |
In case of eutectoid steels which one of the following structures has the maximum hardness? |
| A. | Troosite |
| B. | Sorbite |
| C. | Pearlite |
| D. | Acicular |
| E. | Martensite |
| Answer» F. | |
| 13. |
Which of the following material has lowest specific gravity? |
| A. | Aluminium |
| B. | Brass |
| C. | Copper |
| D. | High carbon steel |
| E. | Zinc |
| Answer» B. Brass | |
| 14. |
DIN standards are used in |
| A. | India |
| B. | Britain |
| C. | France |
| D. | USSR |
| E. | Germany |
| Answer» F. | |
| 15. |
A material which undergoes no deformation till its yield point is reached and then it flows at a constant stress is known as |
| A. | Rigid plastic |
| B. | Elastic |
| C. | Rigid |
| D. | Plastic |
| E. | Elastic-plastic |
| Answer» B. Elastic | |
| 16. |
The property of materials by which they can be drawn into wires is known as |
| A. | Creep |
| B. | Malleability |
| C. | Elasticity |
| D. | Plasticity |
| E. | Ductility |
| Answer» F. | |
| 17. |
When a current is passed through the junction of two different metals, heat is absorbed or liberated depending on the direction of the current. The above phenomenon is known as |
| A. | Kelvin effect |
| B. | Joule's effect |
| C. | Peltier's effect |
| D. | None of the above |
| E. | None of the above |
| Answer» D. None of the above | |
| 18. |
The process of zinc coating used extensively for protecting steel from atmospheric deterioration is known as |
| A. | Anodizing |
| B. | Colourizing |
| C. | Pakerizing |
| D. | Galvanizing |
| E. | None of the above |
| Answer» E. None of the above | |
| 19. |
Which of the following material can be used for the filaments in incandescent lamps? |
| A. | Carbon |
| B. | Tungsten |
| C. | Tantalum |
| D. | Any of the above |
| E. | None of the above |
| Answer» C. Tantalum | |
| 20. |
Which of the following hardness tester can be used to determine the hardness of a glass sheet? |
| A. | Brinell hardness tester |
| B. | Vickers hardness tester |
| C. | Rockwell hardness tester |
| D. | Shore scleroscope |
| E. | None of the above |
| Answer» E. None of the above | |
| 21. |
A material is known as allotropic or polymoriphic if it |
| A. | Has its atoms distributed in random pattern |
| B. | Responds to heat tretment |
| C. | Has a fixed structure under all conditions |
| D. | Exists in several crystal forms at different temperatures |
| E. | Can be cast |
| Answer» D. Exists in several crystal forms at different temperatures | |
| 22. |
In flame hardening the flame used is |
| A. | Oil burner |
| B. | A wick stove |
| C. | Oxygene air |
| D. | Gas burner |
| E. | Oxy-acetylene |
| Answer» F. | |
| 23. |
Which process is used primarily to obtain surface finish |
| A. | Swaging |
| B. | Electroforming |
| C. | Shining |
| D. | Broaching |
| E. | Parkerizing |
| Answer» F. | |
| 24. |
Nickel is used in |
| A. | cutting tools |
| B. | automatic voltage regulators |
| C. | electrodes of thermionic valves |
| D. | pressure sensitive elements |
| E. | None of the above |
| Answer» D. pressure sensitive elements | |
| 25. |
What is the atomic or ionic characteristic that determines the elements of which the atom or iron is representative? |
| A. | The nuber of electrons |
| B. | The mass |
| C. | Vitrified clay |
| D. | The number of protons |
| E. | The number of neutrons |
| Answer» E. The number of neutrons | |
| 26. |
When a normal atom loses an electron, the atom |
| A. | Becomes a positive ion |
| B. | Becomes a negative ion |
| C. | Becomes a electrically neutral |
| D. | Is then free to move about |
| E. | None of the above |
| Answer» B. Becomes a negative ion | |
| 27. |
A hydrogen atom has |
| A. | Two electrons |
| B. | No neutrons |
| C. | No protons |
| D. | One each electron, neutron and proton |
| E. | None of the above |
| Answer» C. No protons | |
| 28. |
When a Ge-crystal is doped with phosphorous atom, it becomes |
| A. | Photo sensitive |
| B. | N-type semi-conductor |
| C. | A ferite |
| D. | An insulator |
| E. | P-type semi-conductor |
| Answer» C. A ferite | |
| 29. |
The statement that, at equilibrium, the number of phases plus the degrees of freedom must equal the number of components plus two is known as |
| A. | Gibbs phase rule |
| B. | Lever rule |
| C. | Fick's rule |
| D. | Heisenberg rule |
| E. | None of the above |
| Answer» B. Lever rule | |
| 30. |
A lead based bearing alloy contains |
| A. | Lead-nickle-tin |
| B. | Lead-aluminium-copper |
| C. | Lead-antimony-tin-silver |
| D. | Lead-antimony-tin-copper |
| E. | Lead-copper-tin-copper |
| Answer» E. Lead-copper-tin-copper | |
| 31. |
An atom containing an odd number of electrons is said to be |
| A. | Hypermagnetic |
| B. | Paramgnetic |
| C. | Ferromagnetic |
| D. | Diamagnetic |
| E. | Dielectric |
| Answer» C. Ferromagnetic | |
| 32. |
Which of the following factor has the least effect on the electrical conductivity of wires made of copper alloy? |
| A. | Temperature |
| B. | Alloying element |
| C. | Vitrified clay |
| D. | Method of forming the wire |
| E. | Intensity of any incident light |
| Answer» F. | |
| 33. |
Brinell hardness number for nitrided steel is in the range |
| A. | 60 to 80 |
| B. | 100 to 150 |
| C. | 300 to 450 |
| D. | 700 to 800 |
| E. | 200 to 300 |
| Answer» E. 200 to 300 | |
| 34. |
Inconel is an alloy containing |
| A. | Nickel, zinc and iron |
| B. | Copper nickel and chromium |
| C. | Nickel, chromium and iron |
| D. | Nickel, copper and iron |
| E. | Copper, nickel and cobalt |
| Answer» B. Copper nickel and chromium | |
| 35. |
The highest percentage of carbon that an iron carbon alloy can have is |
| A. | 3% |
| B. | 4.40% |
| C. | 12.12% |
| D. | 2% |
| E. | 6.60% |
| Answer» F. | |
| 36. |
A bearing alloy should have |
| A. | High resistance to corrosion |
| B. | Capacity to withstand shocks and vibrations |
| C. | All above |
| D. | Low coefficient of friction |
| E. | High compressive strength |
| Answer» D. Low coefficient of friction | |
| 37. |
Which of the following alloy does not contain tin? |
| A. | Gun metal |
| B. | Phosphor bronze |
| C. | Fusible plug material |
| D. | White metal |
| E. | All of the above |
| Answer» E. All of the above | |
| 38. |
The main alloy for corrosion resistance in stainless steel is |
| A. | Manganese |
| B. | Carbon |
| C. | Vanadium |
| D. | Cobalt |
| E. | Chromium |
| Answer» F. | |
| 39. |
Which of the following is not a rare and precious metal? |
| A. | Platinum |
| B. | Palladium |
| C. | Tantalum |
| D. | Lithium |
| E. | None of the above |
| Answer» E. None of the above | |
| 40. |
The process in which steel is heated 20? to 40?C below the lower critical temperature, held there for a prolonged period and then allowed to cool slowly in the furnace is known as |
| A. | Annealing |
| B. | Tempering |
| C. | Normalising |
| D. | Austempering |
| E. | Spheroidising |
| Answer» F. | |
| 41. |
The blast furnace uses the following as fuel |
| A. | Blast furnace gas |
| B. | Cooking coal |
| C. | Producer gas |
| D. | Coke |
| E. | Coal |
| Answer» E. Coal | |
| 42. |
If steel is slowly cooled in furnace, the structure obtained is |
| A. | Pearlite |
| B. | Martensite |
| C. | Sorbite |
| D. | Acicular |
| E. | Troosite |
| Answer» B. Martensite | |
| 43. |
Limestone is added in blast furnace to flux |
| A. | Silicon xoide |
| B. | Carbon |
| C. | MnO2 |
| D. | Sulphur |
| E. | None of the above |
| Answer» B. Carbon | |
| 44. |
The product of blast furnace is known as |
| A. | High carbon steel |
| B. | Steel |
| C. | Pig iron |
| D. | Crude iron |
| E. | Cast iron |
| Answer» C. Pig iron | |
| 45. |
Blast furnace gas is |
| A. | Used as fuel in a blast furnace |
| B. | A by-product of blast furnace |
| C. | A flue gas discharged to atmosphere |
| D. | Used as a cooking gas |
| E. | Highly poisonous |
| Answer» C. A flue gas discharged to atmosphere | |
| 46. |
In induction hardening |
| A. | Only d.c. supply is used |
| B. | The power factor is high |
| C. | The voltage is high |
| D. | The frequency is high |
| E. | The current is high |
| Answer» E. The current is high | |
| 47. |
Porous materials generally |
| A. | Transmit sound |
| B. | Isentropic material |
| C. | Absorb most of the sound |
| D. | Reflect entire sound |
| Answer» D. Reflect entire sound | |
| 48. |
A body which does not contain voids or empty spaces is known as |
| A. | Continuous body |
| B. | An isotropic body |
| C. | Heterogeneous body |
| D. | Crystalline body |
| E. | None of the above |
| Answer» B. An isotropic body | |
| 49. |
A non-crystalline polymer which can be stretched to more than twice its original length and which contracts quickly on releasing the load, is known as |
| A. | copolymer |
| B. | dilatant |
| C. | plastic |
| D. | elastomer |
| E. | None of the above |
| Answer» E. None of the above | |
| 50. |
The phenomenon of 'weld decay' is associated with |
| A. | Stainless steels |
| B. | Manganese steels |
| C. | Aluminium alloys |
| D. | Cast iron |
| E. | Brass |
| Answer» B. Manganese steels | |