MCQOPTIONS
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MCQOPTIONS
This section includes 34 Mcqs, each offering curated multiple-choice questions to sharpen your Automobile Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
When the steel is normalised, its |
| A. | yield point increases |
| B. | ductility decreases |
| C. | ultimate tensile strength increases |
| D. | all of these |
| Answer» E. | |
| 2. |
The type of space lattice found in gamma-iron is |
| A. | face centred cubic space lattice |
| B. | body centred cubic space lattice |
| C. | close packed hexagonal space lattice |
| D. | none of these |
| Answer» B. body centred cubic space lattice | |
| 3. |
The cupola is used to manufacture |
| A. | pig iron |
| B. | cast iron |
| C. | wrought iron |
| D. | steel |
| Answer» C. wrought iron | |
| 4. |
Free carbon in iron makes the metal |
| A. | soft and gives a coarse grained crystalline structure |
| B. | soft and gives a fine grained crystalline structure |
| C. | hard and gives a coarse grained crystalline structure |
| D. | hard and gives a fine grained crystalline structure |
| Answer» B. soft and gives a fine grained crystalline structure | |
| 5. |
Nodular cast iron is produced by adding __________ to the molten cast iron. |
| A. | nickel |
| B. | chromium |
| C. | copper |
| D. | magnesium |
| Answer» E. | |
| 6. |
The lower critical temperature |
| A. | decreases as the carbon content in steel increases |
| B. | increases as the carbon content in steel increases |
| C. | is same for all steels |
| D. | depends upon the rate of heating |
| Answer» D. depends upon the rate of heating | |
| 7. |
Ferrite and pearlite makes the steel soft and ductile. |
| A. | Agree |
| B. | Disagree |
| C. | - |
| D. | - |
| Answer» B. Disagree | |
| 8. |
In full annealing, the hypo-eutectoid steel is heated from 30° C to 50° C above the upper critical temperature and then cooled |
| A. | in still air |
| B. | slowly in the furnace |
| C. | suddenly in a suitable cooling medium |
| D. | any one of these |
| Answer» C. suddenly in a suitable cooling medium | |
| 9. |
Iron ore is, usually, found in the form of |
| A. | oxides |
| B. | carbonates |
| C. | sulphides |
| D. | all of these |
| Answer» E. | |
| 10. |
The electric process of steel making is especially adopted to |
| A. | alloy and carbon tool steel |
| B. | magnet steel |
| C. | high speed tool steel |
| D. | all of these |
| Answer» E. | |
| 11. |
The dieing down of a white flame during the operation of a bessemer converter indicates that the air is burning out silicon and manganese. |
| A. | Yes |
| B. | No |
| C. | - |
| D. | - |
| Answer» C. - | |
| 12. |
The heat treatment process used for softening hardened steel is |
| A. | carburising |
| B. | normalising |
| C. | annealing |
| D. | tempering |
| Answer» E. | |
| 13. |
Nimonic contains __________ percentage of nickel as that of Inconel. |
| A. | same |
| B. | less |
| C. | more |
| D. | - |
| Answer» B. less | |
| 14. |
The coke in the charge of blast furnace |
| A. | controls the grade of pig iron |
| B. | acts as an iron-bearing mineral |
| C. | supplies heat to reduce ore and melt the iron |
| D. | forms a slag by combining with impurities |
| Answer» D. forms a slag by combining with impurities | |
| 15. |
Crystal structure of a material is, generally, examined by |
| A. | naked eye |
| B. | optical microscope |
| C. | metallurgical microscope |
| D. | X-ray techniques |
| Answer» E. | |
| 16. |
The steel produced by bessemer or open hearth process is __________ to that produced by L-D process. |
| A. | superior |
| B. | inferior |
| C. | - |
| D. | - |
| Answer» C. - | |
| 17. |
The material in which the atoms are arranged regularly in some directions but not in others, is called |
| A. | amorphous material |
| B. | mesomorphous material |
| C. | crystalline material |
| D. | none of these |
| Answer» C. crystalline material | |
| 18. |
Haematite iron ore contains iron about |
| A. | 30% |
| B. | 45% |
| C. | 55% |
| D. | 70% |
| Answer» E. | |
| 19. |
The alloying element which increases residual magnetism and coercive magnetic force in steel for magnets is |
| A. | chromium |
| B. | nickel |
| C. | vanadium |
| D. | cobalt |
| Answer» E. | |
| 20. |
Tungsten when added to steel __________ the critical temperature. |
| A. | does not effect |
| B. | lowers |
| C. | raises |
| D. | - |
| Answer» D. - | |
| 21. |
Which of the following process of steel making is in operation at Tata Iron and Steel Works, Jamshedpur? |
| A. | Bessemer process |
| B. | Open hearth process |
| C. | Duplex process |
| D. | Electric process |
| Answer» D. Electric process | |
| 22. |
The charge is fed into the blast furnace through the |
| A. | stack |
| B. | throat |
| C. | bosh |
| D. | tuyers |
| Answer» C. bosh | |
| 23. |
Dye penetrant method is generally used to locate |
| A. | core defects |
| B. | surface defects |
| C. | superficial defects |
| D. | temporary defects |
| Answer» C. superficial defects | |
| 24. |
White cast iron has a high tensile strength and a low compressive strength. |
| A. | Yes |
| B. | No |
| C. | - |
| D. | - |
| Answer» C. - | |
| 25. |
Which of the following has a fine gold colour and is used for imitation jewellery? |
| A. | Silicon bronze |
| B. | Aluminium bronze |
| C. | Gun metal |
| D. | Babbit metal |
| Answer» C. Gun metal | |
| 26. |
An alloy steel which is work hardenable and which is used to make the blades of bulldozers, bucket wheel excavators and other earth moving equipment contain iron, carbon and |
| A. | chromium |
| B. | silicon |
| C. | manganese |
| D. | magnesium |
| Answer» D. magnesium | |
| 27. |
The quenching of steel from the upper critical point results in a fine grained structure. |
| A. | Agree |
| B. | Disagree |
| C. | - |
| D. | - |
| Answer» B. Disagree | |
| 28. |
The hardness and tensile strength in austenitic stainless steel can be increased by |
| A. | hardening and cold working |
| B. | normalising |
| C. | martempering |
| D. | full annealing |
| Answer» B. normalising | |
| 29. |
A material is said to be allotropic, if it has |
| A. | fixed structure at all temperatures |
| B. | atoms distributed in random pattern |
| C. | different crystal structures at different temperatures |
| D. | any one of the above |
| Answer» D. any one of the above | |
| 30. |
The ability of a material to absorb energy in the plastic range is called |
| A. | resilience |
| B. | creep |
| C. | fatigue strength |
| D. | toughness |
| Answer» E. | |
| 31. |
The percentage of carbon in cast iron varies from |
| A. | 0.1 to 0.5 |
| B. | 0.5 to 1 |
| C. | 1 to 1.7 |
| D. | 1.7 to 4.5 |
| Answer» E. | |
| 32. |
Malleable cast iron is produced |
| A. | by adding magnesium to molten cast iron |
| B. | by quick cooling of molten cast iron |
| C. | from white cast iron by annealing process |
| D. | none of these |
| Answer» D. none of these | |
| 33. |
An eutectoid steel consists of |
| A. | wholly pearlite |
| B. | wholly austenite |
| C. | pearlite and ferrite |
| D. | pearlite and cementite |
| Answer» B. wholly austenite | |
| 34. |
Specify the sequence correctly |
| A. | Grain growth, recrystallisation, stress relief |
| B. | Stress relief, grain growth, recrystallisation |
| C. | Stress relief, recrystallisation, grain growth |
| D. | Grain growth, stress relief, recrystallisation |
| Answer» D. Grain growth, stress relief, recrystallisation | |