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. |
The rammer used for packing the sand in pockets/corners of a mould is known as |
| A. | Floor rummer |
| B. | Hand rammer |
| C. | Peen rammer |
| Answer» E. | |
| 2. |
In furan moulding which of the following is used as a catalyst? |
| A. | Potassium hydroxide |
| B. | Phosphoric acid |
| C. | Ammonium hydroxide |
| D. | Phenol formaldehyde |
| Answer» C. Ammonium hydroxide | |
| 3. |
When bench moulding is adopted using three boxes, the central box is called |
| A. | cope |
| B. | cheek |
| C. | drag |
| D. | none of the above |
| Answer» C. drag | |
| 4. |
Carbondioxide moulding is useful for |
| A. | very thin sections |
| B. | regular sections |
| C. | heavy and thick walled sections |
| D. | all of the above |
| Answer» D. all of the above | |
| 5. |
Which of the following sand must possess high refractoriness? |
| A. | Backing sand |
| B. | Parting sand |
| C. | Facing sand |
| D. | all of the above |
| Answer» D. all of the above | |
| 6. |
Cores are made from core sand mixed with the binder which may be |
| A. | linseed oil |
| B. | turpentine |
| C. | cement |
| D. | none of the above |
| Answer» B. turpentine | |
| 7. |
White cst iron contains |
| A. | free graphite |
| B. | cementite |
| C. | free carbon |
| D. | none of the above |
| Answer» C. free carbon | |
| 8. |
Polystyrene is generally available in the form of |
| A. | trapezoidal moulds |
| B. | square sections |
| C. | plates |
| D. | cylindrical bars |
| Answer» E. | |
| 9. |
Investment casting can be used for which of the following alloys |
| A. | cobalt based satellite |
| B. | Tool steels |
| C. | Hynes super alloys |
| D. | All of the above |
| Answer» E. | |
| 10. |
Wood used for pattern making has knots. This is likely to affect |
| A. | warping of the piece |
| B. | machinability of pattern |
| C. | moisture content of wood |
| D. | all of the above |
| Answer» E. | |
| 11. |
Sprues are generally |
| A. | tapered upwards |
| B. | tapered downwards |
| C. | uniform size |
| Answer» D. | |
| 12. |
During the passage of molten metal through the coke, the carbon percentage of the molten metal increases. The absorption of carbon depends on |
| A. | size of the coke |
| B. | temperature |
| C. | time allowed for molten metal to remain in the cupola |
| D. | all of the above |
| Answer» E. | |
| 13. |
As a result of melting of cast iron in cupola, which of the following constituent undergoes least change in its percentage? |
| A. | Manganese |
| B. | Phosphorous |
| C. | Silicon |
| D. | Sulphur |
| Answer» D. Sulphur | |
| 14. |
Which grain shape of sand particles is least preferred for foundry sands? |
| A. | Round |
| B. | Compound |
| C. | angular |
| Answer» C. angular | |
| 15. |
If an old casting is to be used as a pattern, to account for various allowances. |
| A. | to provide draw screws, holes can be drilled and tapped in the castings |
| B. | the castings are cleaned and made smooth |
| C. | casting is shaken while withdrawing from mould |
| D. | the surfaces are lagged with thin strips of wood or leater |
| Answer» E. | |
| 16. |
A mould which has good erosion resistance to metal flow and is also collapsible is |
| A. | green sand mould |
| B. | skin dry sand mould |
| C. | dry sand mould |
| D. | none of the above |
| Answer» C. dry sand mould | |
| 17. |
Hot spots are generally found in castings |
| A. | symmetrical about two axes |
| B. | having abrupt variation in section |
| C. | with uniform cross-section |
| D. | small in weight but large in volume |
| Answer» C. with uniform cross-section | |
| 18. |
High silicon irons are |
| A. | resistant to wear |
| B. | brown in colour |
| C. | machinable |
| D. | malleable |
| Answer» B. brown in colour | |
| 19. |
Slag in a blast furnace is |
| A. | lighter than molten iron |
| B. | heavier than molten iron |
| Answer» C. | |
| 20. |
A drawback is employed when |
| A. | the pattern is too bulky |
| B. | the pattern is too long |
| C. | the pattern is not made of wood |
| D. | the pattern cannot be drawn from mould due to projection |
| Answer» E. | |
| 21. |
Normal shrinkage allowance for aluminium is 18 mm per metre and that for cast iron 10 mm per metre. If the metal pattern is to be made of aluminium and the casting is to be of cast iron, the shrinkage allowed on wooden master pattern will be |
| A. | 10 mm/metre |
| B. | 28 mm/metre |
| C. | 8 mm/metre |
| D. | 18 mm/metre |
| Answer» C. 8 mm/metre | |
| 22. |
In fluminium foundry, for removing dissolved hydrogen and the entrapped dross, the flux used is |
| A. | nitrogen |
| B. | helium |
| C. | chlorine |
| D. | any of the above |
| Answer» E. | |
| 23. |
Which of the following is used to obtain fine surface finish in ferrous castings? |
| A. | Ground pitch |
| B. | Sea coal |
| C. | Gilsonite |
| D. | any of the above |
| Answer» E. | |
| 24. |
The amount of machining allowance on castings depends on |
| A. | size and shape of the casting |
| B. | casting orientation |
| C. | characteristics of the metal |
| D. | all of the above |
| Answer» E. | |
| 25. |
Which of the following test on castings is based on sound? |
| A. | Magnetic particle inspections |
| B. | Percussion test |
| C. | Impact test |
| D. | Radiographic |
| Answer» D. Radiographic | |
| 26. |
Distortion in castings can be reduced by |
| A. | modifying design |
| B. | providing sufficient machining allowance |
| C. | improving foundry practice |
| D. | all of the above |
| Answer» E. | |
| 27. |
Hand tool used in foundry shop for mixing and conditioning the foundry sand is termed |
| A. | Shovel |
| B. | Trowel |
| C. | Riddle |
| Answer» B. Trowel | |
| 28. |
Pattern used in foundry shop is |
| A. | Somewhat smaller in size than the casting |
| B. | Somewhat larger in size than the casting |
| C. | Equal in size to the casting |
| Answer» E. | |
| 29. |
In die casting |
| A. | there is no need of air venting |
| B. | there is no restriction of material, any material that can be poured can be cast |
| C. | the product surface is smooth and clean without the parting line |
| D. | the heat loss from molten metal is fast as the mould is metallic |
| Answer» F. | |
| 30. |
Choose the correct statement in respect of die casting machine |
| A. | In hot chamber die casting machine the metal is melted in the machine itself |
| B. | In cold chamber die casting machine metal of low melting point is cast |
| C. | In cold chamber die casting machine there is no need to cool the die from outside |
| D. | none of the above |
| Answer» B. In cold chamber die casting machine metal of low melting point is cast | |
| 31. |
In die castings, heavy local sections are usually avoided and replaced by |
| A. | channel sections |
| B. | corrugated forms |
| C. | ribs |
| D. | any of the above |
| Answer» E. | |
| 32. |
Non-uniform distribution of alloying components, inclusions and impurities in an ingot or casting are known as |
| A. | ageing |
| B. | bleeding |
| C. | innoculation |
| D. | segregation |
| Answer» F. | |
| 33. |
Blow holes in castings are due to |
| A. | high moisture content of the sand |
| B. | low permeability of sand |
| C. | excessive fine grains and gas producing ingredients |
| D. | any of the above |
| Answer» E. | |
| 34. |
If ash content of coke used in cupola is high then |
| A. | melting rate will be low |
| B. | castings produced will have blow holes |
| C. | more of flux will be required |
| D. | carbon content of castings will be low |
| Answer» D. carbon content of castings will be low | |
| 35. |
First step in reclaiming the moulding and core sand is |
| A. | addition of moisture |
| B. | reproportioning of binder |
| C. | separation of metal particles |
| D. | any of the above |
| Answer» D. any of the above | |
| 36. |
Oil fired furnaces are generally used for the melting of |
| A. | alloy steel |
| B. | cast steel |
| C. | cast iron |
| D. | non-ferrous metals |
| Answer» F. | |
| 37. |
A designer would attempt to avoid bosses and pads in the casting because |
| A. | projections such as bosses and pads can not merge with thinner sections |
| B. | it is difficult to incorporate in pattern |
| C. | they being thicker will take longer to solidify and hence will suffer from residual stresses and coarse grains |
| D. | mould formation is difficult in pressence of boss |
| Answer» D. mould formation is difficult in pressence of boss | |
| 38. |
Electric indirect are furnace is normally used for melting of |
| A. | alloy steels |
| B. | cast steels |
| C. | non-ferrous metals |
| D. | all of the above |
| Answer» D. all of the above | |
| 39. |
The "Green sand" is termed so, because |
| A. | it is green in colour |
| B. | it contains moisture |
| C. | none of the above |
| Answer» C. none of the above | |
| 40. |
In case of cored aluminium castings, the contraction allowance is |
| A. | more than the normal allowance |
| B. | less than the normal allowance |
| C. | same as the normal allowance |
| Answer» D. | |
| 41. |
Sand grains which give high mould strength are |
| A. | Sub-angular grains |
| B. | Rounded grains |
| C. | Sharp or Angular grains |
| Answer» E. | |
| 42. |
Head storage capacity of moulding sand can be increased by adding? |
| A. | graphite |
| B. | chromite |
| C. | magnesium powder |
| D. | any of the above |
| Answer» C. magnesium powder | |
| 43. |
Investment casting is also known as |
| A. | lost wax casting |
| B. | lost pattern casting |
| C. | hot investment casting |
| D. | any of the above |
| Answer» E. | |
| 44. |
Padding is |
| A. | a method for production of chilled castings |
| B. | an extra support for thin castings |
| C. | an extra metal added to the original uniform section of the casting |
| D. | none of the above |
| Answer» D. none of the above | |
| 45. |
In case of carbondioxide moulding, the binder used is generally |
| A. | coal dust |
| B. | graphite |
| C. | sodium silicate |
| D. | china clay |
| Answer» E. | |
| 46. |
When wooden patterns with metallic coating are to be used, the metal sprayed on wooden pattern could be |
| A. | bismuth |
| B. | zinc |
| C. | aluminium |
| D. | any of the above |
| Answer» E. | |
| 47. |
Which of the following is core hardening process? |
| A. | CO2 process |
| B. | Cold set process |
| C. | Furan system |
| D. | All of the above |
| Answer» E. | |
| 48. |
The location of riser least depends on |
| A. | the size of core |
| B. | feasibility of directional solidification |
| C. | the metal to be cast |
| D. | design of casting |
| Answer» B. feasibility of directional solidification | |
| 49. |
In case of cast steel, the contraction allowance will be least for castings having dimensions |
| A. | upto 600 mm |
| B. | 1000 mm to 1800 mm |
| C. | 600 to 1000 mm |
| D. | above 1800 mm |
| Answer» F. | |
| 50. |
Which wood can be used for making patterns? |
| A. | Mathogany |
| B. | Pine wood |
| C. | Teak wood |
| D. | any of the above |
| Answer» E. | |