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. |
Connecting rod is, usually, made from |
| A. | low carbon steel |
| B. | high carbon steel |
| C. | medium carbon steel |
| D. | high speed steel |
| Answer» D. high speed steel | |
| 2. |
In a crystalline material, atoms are arranged in definite and orderly manner and form. |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 3. |
The bond formed by transferring electrons from one atom to another is called |
| A. | ionic bond |
| B. | covalent bond |
| C. | metallic bond |
| D. | none of these |
| Answer» B. covalent bond | |
| 4. |
Which of the following property is desirable in parts subjected to shock and impact loads? |
| A. | Strength |
| B. | Stiffness |
| C. | Brittleness |
| D. | Toughness |
| Answer» E. | |
| 5. |
Chromium when added to steel __________ the tensile strength. |
| A. | does not effect |
| B. | decreases |
| C. | increases |
| Answer» D. | |
| 6. |
Free cutting steels |
| A. | contain carbon in free from |
| B. | require minimum cutting force |
| C. | is used where rapid machining is the prime requirement |
| D. | can be cut freely |
| Answer» D. can be cut freely | |
| 7. |
The presence of hydrogen in steel causes |
| A. | reduced neutron absorption cross-section |
| B. | improved weldability |
| C. | embrittlement |
| D. | corrosion resistance |
| Answer» D. corrosion resistance | |
| 8. |
In the middle part of the blast furnace (zone of absorption), the temperature is |
| A. | 400 to 700 C |
| B. | 800 C to 1000 C |
| C. | 1200 C to 1300 C |
| D. | 1500 C to 1700 C |
| Answer» C. 1200 C to 1300 C | |
| 9. |
A steel with carbon __________ is known as hypo-eutectoid steel. |
| A. | 0.8% |
| B. | below 0.8% |
| C. | above 0.8% |
| Answer» C. above 0.8% | |
| 10. |
Which of the following is added in low carbon steels to prevent them from becoming porous? |
| A. | Sulphur |
| B. | Phosphorus |
| C. | Manganese |
| D. | Silicon |
| Answer» E. | |
| 11. |
The temperature in the upper part of the blast furnace (zone of reduction) is __________ that of the middle part. |
| A. | equal to |
| B. | less than |
| C. | more than |
| Answer» C. more than | |
| 12. |
Aluminium bronze has high resistance to corrosion. |
| A. | True |
| B. | False |
| Answer» C. | |
| 13. |
The temperature point at which the change starts on heating the steel is called |
| A. | lower critical point |
| B. | upper critical point |
| C. | point of recalescence |
| D. | point of decalescence |
| Answer» B. upper critical point | |
| 14. |
Y-alloy contains |
| A. | 3.5 to 4.5% copper, 0.4 to 0.7% magnesium, 0.4 to 0.7% manganese and rest aluminium |
| B. | 3.5 to 4.5% copper, 1.2 to 1.7% manganese, 1.8 to 2.3% nickel, 0.6% each of silicon, magnesium and iron, and rest aluminium |
| C. | 4 to 4.5% magnesium, 3 to 4% copper and rest aluminium |
| D. | 5 to 6% tin, 2 to 3% copper and rest aluminium |
| Answer» C. 4 to 4.5% magnesium, 3 to 4% copper and rest aluminium | |
| 15. |
The steel scrap added in the charge of cupola controls the grade of cast iron produced. |
| A. | Correct |
| B. | Incorrect |
| Answer» B. Incorrect | |
| 16. |
Which of the following when used in ordinary low carbon steels, makes the metal ductile and of good bending qualities? |
| A. | Sulphur |
| B. | Phosphorus |
| C. | Manganese |
| D. | Silicon |
| Answer» D. Silicon | |
| 17. |
The hardness of steel depends upon the |
| A. | amount of cementite it contains |
| B. | amount of carbon it contains |
| C. | contents of alloying elements |
| D. | method of manufacture of steel |
| Answer» C. contents of alloying elements | |
| 18. |
The process used for relieving the internal stresses previously set up in the Metal and for increasing the machinability of steel, is |
| A. | normalising |
| B. | full annealing |
| C. | process annealing |
| D. | spheroidising |
| Answer» D. spheroidising | |
| 19. |
The austenitic stainless steel contains |
| A. | 18% chromium and 8% nickel |
| B. | 8% chromium and 18% nickel |
| C. | 14% chromium and 0.35% carbon |
| D. | 14% nickel and 0.35% carbon |
| Answer» B. 8% chromium and 18% nickel | |
| 20. |
Which of the following metal is used in making electrical resistance wire for electric furnaces and heating elements? |
| A. | Babbit metal |
| B. | Monel metal |
| C. | Nichrome |
| D. | Phosphor bronze |
| Answer» D. Phosphor bronze | |
| 21. |
The main alloying elements high speed steel in order of increasing proportion are |
| A. | vanadium, chromium, tungsten |
| B. | tungsten, titanium, vanadium |
| C. | chromium, titanium, vanadium |
| D. | tungsten, chromium, titanium |
| Answer» B. tungsten, titanium, vanadium | |
| 22. |
Manganese bronze has |
| A. | good wearing qualities and high elasticity |
| B. | high yield point, high fatigue limit and excellent cold and hot corrosion resistance |
| C. | high resistance to corrosion |
| D. | valuable cold working property |
| Answer» D. valuable cold working property | |
| 23. |
A steel is heated at about 875 C where the structure consists of entirely austenite. It is then cooled suddenly at a temperature of about 250 C to 525 C. This process of heat treatment is known as |
| A. | normalising |
| B. | annealing |
| C. | austempering |
| D. | martempering |
| Answer» D. martempering | |
| 24. |
The catalysts are used to accelerate the chemical reaction during the process of ploymerisation of plastics. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 25. |
Silicon bronze contains |
| A. | 60% copper, 35% zinc and 5% manganese |
| B. | 88% copper, 10% tin and 2% zinc |
| C. | 96% copper, 3% silicon and 1% manganese |
| D. | 76% copper, 20% silicon and 4% zinc |
| Answer» D. 76% copper, 20% silicon and 4% zinc | |
| 26. |
In acidic bessemer process, the furnace is lined with |
| A. | silica bricks |
| B. | a mixture of tar and burnt dolomite bricks |
| C. | either (a) or (b) |
| D. | none of these |
| Answer» B. a mixture of tar and burnt dolomite bricks | |
| 27. |
The stiffness is the ability of a material to resist deformation under stress. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 28. |
Muntz metal (Yellow brass) contains |
| A. | 70% copper and 30% zinc |
| B. | 60% copper and 40% zinc |
| C. | 59% copper, 40% zinc and 1% tin |
| D. | 60.45% copper, 35.2% zinc and 5.35% nickel |
| Answer» C. 59% copper, 40% zinc and 1% tin | |
| 29. |
The acidic bessemer process is suitable for producing steel from pig iron containing large quantities of phosphorus. |
| A. | Correct |
| B. | Incorrect |
| Answer» C. | |
| 30. |
Delta-iron occurs between the temperature range of |
| A. | 400 C to 600 C |
| B. | 600 C to 900 C |
| C. | 900 C to 1400 C |
| D. | 1400 C to 1530 C |
| Answer» E. | |
| 31. |
Cast iron is used in those parts which are subjected to shocks. |
| A. | Correct |
| B. | Incorrect |
| Answer» C. | |
| 32. |
The aluminium alloy made by melting aluminium with 2 to 10% magnesium and 1.75% copper is called |
| A. | duralumin |
| B. | Y-alloy |
| C. | magnalium |
| D. | hindalium |
| Answer» D. hindalium | |
| 33. |
In low carbon steels, presence of small quantities of sulphur improves |
| A. | weldability |
| B. | formability |
| C. | machinability |
| D. | hardenability |
| Answer» D. hardenability | |
| 34. |
According to Indian standard specifications, SG 400/15 means |
| A. | spheroidal graphite cast iron with B.H.N. 400 and minimum tensile strength 15 MPa |
| B. | spheroidal graphite cast iron with minimum tensile strength 400 MPa and 15 percent elongation |
| C. | spheroidal graphite cast iron with minimum compressive strength 400 MPa and 15 percent reduction in area |
| D. | none of the above |
| Answer» C. spheroidal graphite cast iron with minimum compressive strength 400 MPa and 15 percent reduction in area | |
| 35. |
White cast iron has |
| A. | carbon in the form of carbide |
| B. | low tensile strength |
| C. | high compressive strength |
| D. | all of these |
| Answer» E. | |
| 36. |
In process annealing, the hypo-eutectoid steel is |
| A. | heated from 30 C to 50 C above the upper critical temperature and then cooled in still air |
| B. | heated from 30 C to 50 C above the upper critical temperature and then cooled suddenly in a suitable cooling medium |
| C. | heated from 30 C to 50 C above the upper critical temperature and then cooled slowly in the furnace |
| D. | heated below or close to the lower critical temperature and then cooled slowly |
| Answer» E. | |
| 37. |
Iron-carbon alloys containing carbon __________ 4.3% are known as hyper-eutectic cast irons. |
| A. | equal to |
| B. | less than |
| C. | more than |
| Answer» D. | |
| 38. |
The defect which takes place due to imperfect packing of atoms during crystallisation is known as |
| A. | line defect |
| B. | surface defect |
| C. | point defect |
| D. | none of these |
| Answer» D. none of these | |
| 39. |
Age hardening is related to |
| A. | duralumin |
| B. | brass |
| C. | copper |
| D. | silver |
| Answer» B. brass | |
| 40. |
Which of the following metal shrinks most from molten state to solid state? |
| A. | Cast iron |
| B. | Cast steel |
| C. | Brass |
| D. | Admirality metal |
| Answer» E. | |
| 41. |
Phosphorus is added in low carbon steels to raise its yield point. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 42. |
Duralumin contains |
| A. | 3.5 to 4.5% copper, 0.4 to 0.7% magnesium, 0.4 to 0.7% manganese and rest aluminium |
| B. | 3.5 to 4.5% copper, 1.2 to 1.7% managanese, 1.8 to 2.3% nickel, 0.6% each of silicon, magnesium and iron, and rest aluminium |
| C. | 4 to 4.5% magnesium, 3 to 4% copper and rest aluminium |
| D. | 5 to 6% tin, 2 to 3% copper and rest aluminium |
| Answer» B. 3.5 to 4.5% copper, 1.2 to 1.7% managanese, 1.8 to 2.3% nickel, 0.6% each of silicon, magnesium and iron, and rest aluminium | |
| 43. |
The addition of which of the following improves machining of copper? |
| A. | Sulphur |
| B. | Vanadium |
| C. | Tin |
| D. | Zinc |
| Answer» B. Vanadium | |
| 44. |
When a medium carbon steel is heated to coarsening temperature, |
| A. | there is no change in grain size |
| B. | the average grain size is a minimum |
| C. | the grain size increases very rapidly |
| D. | the grain size first increases and then decreases very rapidly |
| Answer» D. the grain size first increases and then decreases very rapidly | |
| 45. |
The upper critical point varies according to the carbon content in steel. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 46. |
The alloy, mainly used for corrosion resistance in stainless steels is |
| A. | silicon |
| B. | manganese |
| C. | carbon |
| D. | chromium |
| Answer» E. | |
| 47. |
A coarse grained steel |
| A. | is less tough and has a greater tendency to distort during heat treatment |
| B. | is more ductile and has a less tendency to distort during heat treatment |
| C. | is less tough and has a less tendency to distort during heat treatment |
| D. | is more ductile and has a greater tendency to distort during heat treatment |
| Answer» B. is more ductile and has a less tendency to distort during heat treatment | |
| 48. |
The temperature required for full annealing in hyper-eutectoid steel is |
| A. | 30 C to 50 C above upper critical temperature |
| B. | 30 C to 50 C below upper critical temperature |
| C. | 30 C to 50 C above lower critical temperature |
| D. | 30 C to 50 C below lower critical temperature |
| Answer» D. 30 C to 50 C below lower critical temperature | |
| 49. |
The steel produced by cementation process is known as __________ steel. |
| A. | blister |
| B. | crucible |
| Answer» B. crucible | |
| 50. |
In low carbon steels, __________ raises the yield point and improves the resistance to atmospheric corrosion. |
| A. | sulphur |
| B. | phosphorus |
| C. | manganese |
| D. | silicon |
| Answer» C. manganese | |