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. |
Tempering is generally done to reduce all of the following EXCEPT |
| A. | Hardness |
| B. | Brittleness |
| C. | Tensile strength |
| D. | Ductility |
| Answer» E. | |
| 2. |
All of the following are boring tools EXCEPT |
| A. | Gauge |
| B. | Pinchdog |
| C. | Brace |
| D. | Auger bit |
| Answer» D. Auger bit | |
| 3. |
Which of the following is used as protective admixture in moulding sand for magnesium castings? |
| A. | Boric acid |
| B. | Sublimed sulphur |
| C. | Fluoric additives |
| D. | Any of the above |
| Answer» E. | |
| 4. |
Magnesium aluminium alloys are grain refined by addition of |
| A. | manganese |
| B. | sulphur |
| C. | carbon |
| D. | tin |
| Answer» D. tin | |
| 5. |
A slick is mainly used for |
| A. | repairing and finishing of mould |
| B. | removing pattern from the mould |
| C. | making openings in mould |
| D. | providing openings in the mould |
| Answer» C. making openings in mould | |
| 6. |
The cross-section of a sprue |
| A. | square |
| B. | circular |
| C. | rectangular |
| D. | any of the above |
| Answer» E. | |
| 7. |
The advantage of shell moulding is |
| A. | Less sand requirement |
| B. | Process can be used for all cast metals |
| C. | Good accuracy of dimensions |
| D. | All of the above |
| Answer» E. | |
| 8. |
Chaplets are provided to |
| A. | reduce core sag |
| B. | support heavy cores |
| C. | compensate for inadequate coreseats |
| D. | all of the above |
| Answer» E. | |
| 9. |
The draft allowance to be provided on a pattern depends on |
| A. | the length of the vertical side of the pattern to be extracted |
| B. | the intricacy of the pattern |
| C. | the method of moulding |
| D. | all of the above |
| Answer» E. | |
| 10. |
As a result of melting in cupola, the percentage of all of the following constituents decreases EXCEPT |
| A. | Sulphur |
| B. | Silicon |
| C. | Phosphorous |
| D. | Carbon |
| Answer» F. | |
| 11. |
For stress relieving, castings are |
| A. | heated to low temperature and furnace cooled |
| B. | heated to a temperature around melting point and slowly cooled |
| C. | heated in stages and also cooled in stages |
| D. | heated by flame and air cooled |
| Answer» B. heated to a temperature around melting point and slowly cooled | |
| 12. |
A casting process which can produce hollow cylinder without use of core is |
| A. | permanent mould casting |
| B. | semi permanent mould casting |
| C. | pressed casting |
| D. | none of the above |
| Answer» E. | |
| 13. |
Which of the following is the anti-penetration material introduced in the moulding sand? |
| A. | Coad dust |
| B. | Powdered quartz |
| C. | Black oil |
| D. | all of the above |
| Answer» E. | |
| 14. |
Providing more than adequate machining allowance |
| A. | reduces machining cost |
| B. | increases machining cost |
| C. | improves the strength of the casting |
| D. | reduces the strength of the casting |
| Answer» D. reduces the strength of the casting | |
| 15. |
The contraction allowance for pattern depends on |
| A. | composition of the metal |
| B. | method of moulding used |
| C. | pouring temperature |
| D. | all of the above |
| Answer» E. | |
| 16. |
For sterite refractory bricks are attacked by |
| A. | basic slags |
| B. | acid slags |
| C. | alkali compounds |
| D. | all of the above |
| Answer» C. alkali compounds | |
| 17. |
Polystyrene often used as a consumable pattern material has a relative density of |
| A. | 20 to 25 kg/m3 |
| B. | 2240 to 2500 kg/m3 |
| C. | 120 to 125 kg/m3 |
| D. | 1120 to 1125 kg/m3 |
| Answer» B. 2240 to 2500 kg/m3 | |
| 18. |
Malleable castings are used for |
| A. | boilers |
| B. | Automobiles |
| C. | Elevators |
| D. | all of the above |
| Answer» E. | |
| 19. |
Gated patterns are normally used for |
| A. | castings for light metals |
| B. | castings having several hollow spaces |
| C. | mass production of small castings |
| D. | production of castings which do not require machining |
| Answer» D. production of castings which do not require machining | |
| 20. |
The advantage of oxygen enriched cupola is |
| A. | higher temperature of molten iron |
| B. | high efficiency of cupola |
| C. | reduced heat loss in waste gases |
| D. | all of the above |
| Answer» E. | |
| 21. |
Addition of nickel to cast iron increases |
| A. | hardness |
| B. | corrosion resistance |
| C. | tensile strength |
| D. | all of the above |
| Answer» E. | |
| 22. |
The solidification shrinkage of carbon steel is around |
| A. | 0.5 to 1 percent |
| B. | 2 to 4 percent |
| C. | 8 to 10 percent |
| D. | 0.1 to 0.2 percent |
| Answer» D. 0.1 to 0.2 percent | |
| 23. |
Casting made in relatively simple shapes and designed for subsequent fabrication by rolling, forging etc. are known as |
| A. | rolls |
| B. | pigs |
| C. | ingots |
| D. | chills |
| Answer» E. | |
| 24. |
The tool used to make small holes in the sand mould to allow passage of gases/steam is known as |
| A. | Vent wire |
| B. | Draw screw |
| C. | Draw spike |
| Answer» B. Draw screw | |
| 25. |
Grey cast iron is |
| A. | resistant to shock |
| B. | least fluid in molten condition |
| C. | poor in machining ability |
| D. | costlier than other varieties of cast iron |
| Answer» B. least fluid in molten condition | |
| 26. |
Shell moulding is a process in which |
| A. | a mould comprising thin shell is produced by mixing dry silica and resin binder |
| B. | a thin shell is cast in sand mould |
| C. | a strong core is prepared |
| Answer» B. a thin shell is cast in sand mould | |
| 27. |
Chaplets are |
| A. | core binders |
| B. | core supports |
| C. | mould seats to support core |
| D. | core projections |
| Answer» D. core projections | |
| 28. |
The property of sand to withstand the high temperature of the molten metal without fusing or breakdown is known as |
| A. | porosity |
| B. | refractoriness |
| C. | cohesiveness |
| D. | adhesiveness |
| Answer» D. adhesiveness | |
| 29. |
The method in which green sand is generally used is |
| A. | pit moulding |
| B. | plate moulding |
| C. | bench moulding |
| D. | none of the above |
| Answer» B. plate moulding | |
| 30. |
Which wood is difficult to machine? |
| A. | Kiln dried wood |
| B. | Old and used wood |
| C. | Freshly failed wood |
| D. | Seasoned wood |
| Answer» E. | |
| 31. |
Which of the following is measuring and layout tool? |
| A. | Trammels |
| B. | Combination square |
| C. | Marking gauge |
| D. | all of the above |
| Answer» E. | |
| 32. |
Coke used in cupola is in the form of |
| A. | coal dust |
| B. | pulverized coal |
| C. | lumps |
| D. | any of the above |
| Answer» D. any of the above | |
| 33. |
Highest melting point metal is |
| A. | cast iron |
| B. | Tungsten |
| C. | Steel |
| D. | Nickel |
| Answer» D. Nickel | |
| 34. |
Graphite is sprinkled on to the surface of green sand moulds to |
| A. | reduce the number of blow holes |
| B. | minimize surface finish |
| C. | exclude the burn out effect |
| D. | improve surface finish |
| Answer» E. | |
| 35. |
By compacting the sand |
| A. | both density as well as permeability decrease |
| B. | density increases and permeability |
| C. | both density as well as permeability increase |
| D. | density decreases and permeability increases |
| Answer» D. density decreases and permeability increases | |
| 36. |
Which of the following process uses organic binder? |
| A. | Shell moulding |
| B. | Furan process |
| C. | Phenolic isocyanate process |
| D. | All of the above |
| Answer» E. | |
| 37. |
Skeleton patterns are generally used for |
| A. | hollow castings |
| B. | small casting |
| C. | large castings |
| D. | non-ferrous castings |
| Answer» D. non-ferrous castings | |
| 38. |
Gold melts at |
| A. | 1063?C |
| B. | 3300?C |
| C. | 1444?C |
| D. | 2100?C |
| Answer» B. 3300?C | |
| 39. |
Sodium silicate in sand in often used as |
| A. | binder |
| B. | permeability promotion agent |
| C. | substitute of clay |
| D. | refractory material |
| Answer» B. permeability promotion agent | |
| 40. |
Pit furnace can be used for the melting of |
| A. | cast iron |
| B. | aluminium |
| C. | brass |
| D. | any of the above |
| Answer» E. | |
| 41. |
Flash occurs on diecastings at the |
| A. | gatting system |
| B. | ejection pins |
| C. | vents between the dies |
| D. | parting surface of two dies |
| Answer» F. | |
| 42. |
Which of the following is used on moulds for magnesium castings to prevent metal mould reactions? |
| A. | Boric sulphur |
| B. | Molasses |
| C. | Charcoal |
| D. | all of the above |
| Answer» B. Molasses | |
| 43. |
Investment casting finds application in all of the following EXCEPT |
| A. | Jet engine nozzles |
| B. | Milling cutters |
| C. | Buckets for superchargers |
| D. | Gold ornaments |
| Answer» F. | |
| 44. |
The permeability of moulding sand depends on |
| A. | grain size |
| B. | grain shape |
| C. | moisture content |
| D. | all of the above |
| Answer» E. | |
| 45. |
Local stress relief treatments are generally given to |
| A. | small castings |
| B. | non-ferrous castings |
| C. | all castings |
| D. | too large castings |
| Answer» F. | |
| 46. |
Which of the following is not necessarily the characteristic of investment casting? |
| A. | No disfiguring parting line as found on castings made by cope and drag methods |
| B. | Extreme dimensional accuracy |
| C. | Excellent surface finish |
| D. | Low cost |
| Answer» E. | |
| 47. |
The defect known as 'drop' occurs when the upper surface of the mould cracks and pieces of sand fall into the molten metal. This defect occurs due to |
| A. | low mould hardness |
| B. | insufficient reinforcement |
| C. | low green strength |
| D. | any of the above |
| Answer» E. | |
| 48. |
Silica is the second most important constituent of moulding sand which provides |
| A. | binding strength |
| B. | refractoriness |
| C. | chemical resistance |
| D. | none of the above |
| Answer» B. refractoriness | |
| 49. |
On drying the shrinkage of wood is least |
| A. | along the grains |
| B. | across the grains |
| C. | along the direction of tangent to the annular rings |
| Answer» C. along the direction of tangent to the annular rings | |
| 50. |
Pattern draft for internal surfaces is (in mm/m) |
| A. | 10 -- 30 |
| B. | 50 - 80 |
| C. | 40 - 70 |
| Answer» F. | |