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. |
Metal moulds are used in |
| A. | dry sand moulding |
| B. | green sand moulding |
| C. | die casting process |
| D. | loam moulding |
| Answer» D. loam moulding | |
| 2. |
All of the following are non-destructive method of testing the castings EXCEPT |
| A. | Dye penetrant inspection |
| B. | Pressure test |
| C. | Ultrasonic test |
| D. | Tensile test |
| Answer» F. | |
| 3. |
Contraction of metal starts at the end of |
| A. | mushy stage |
| B. | plastic stage |
| C. | liquid stage |
| D. | solid stage |
| Answer» C. liquid stage | |
| 4. |
Tin coated low carbon steel chaplets are used in |
| A. | ferrous foundries |
| B. | non-ferrous foundries |
| C. | both (A) and (B) above |
| Answer» B. non-ferrous foundries | |
| 5. |
In radiography test on castings which of the following rays are never used? |
| A. | X-rays |
| B. | beta rays |
| C. | gamma rays |
| D. | all of the above |
| Answer» C. gamma rays | |
| 6. |
The residual stresses in casting occur due to |
| A. | sand particles being taken into molten metal while pouring |
| B. | the insufficient gate size |
| C. | the differential solidification rate of thin and thick sections of casting |
| D. | none of the above |
| Answer» D. none of the above | |
| 7. |
The methods of casting for producing ornamental pieces are |
| A. | pressed and slush casting |
| B. | slush and gravity casting |
| C. | gravity and semi permanent mould casting |
| D. | none of the above |
| Answer» B. slush and gravity casting | |
| 8. |
The advantage of centrifugal casting is |
| A. | dense castings |
| B. | elimination of cores |
| C. | mass production with reduced rejection possible |
| D. | all of the above |
| Answer» E. | |
| 9. |
There is no need for the withdrawal of pattern from the mould in case of |
| A. | patterus with core |
| B. | wax patterns |
| C. | hollow patterns |
| D. | consumable patterns |
| Answer» F. | |
| 10. |
Which of the following facilitates shaking and lifting large pattern from the mould? |
| A. | Swab |
| B. | Bellows |
| C. | Trowel |
| D. | Ripping plate |
| Answer» F. | |
| 11. |
On the interior surfaces the draft allowance is usually |
| A. | 40 to 60 mm/metre |
| B. | 10 to 20 mm/metre |
| C. | 100 to 120 mm/metre |
| D. | 200 to 225 mm/metre |
| Answer» B. 10 to 20 mm/metre | |
| 12. |
Annealing of aluminium castings |
| A. | improves ductility |
| B. | relieves micro stresses |
| C. | reduces tensile strength |
| D. | mechanical properties change |
| Answer» C. reduces tensile strength | |
| 13. |
Permeability of sand decreases as |
| A. | permeability increases |
| B. | moisture content increases |
| C. | bonding content increases |
| D. | all of the above |
| Answer» E. | |
| 14. |
Core prints are |
| A. | made separately in the mould by hand |
| B. | made in the mould be separate pattern |
| C. | attached to pattern |
| D. | none of the above |
| Answer» D. none of the above | |
| 15. |
Which inoculant is used to produced ductile iron? |
| A. | Graphite |
| B. | Carbon |
| C. | Fluorides |
| D. | Magnesium |
| Answer» F. | |
| 16. |
The water content of green sand is usually |
| A. | 1 to 2 percent |
| B. | 20 to 25 percent |
| C. | 6 to 8 percent |
| D. | 12 to 18 percent |
| Answer» E. | |
| 17. |
The hardness of the mould is affected by the proportion of ingredients in the sand and |
| A. | degree of ramming |
| B. | the temperature |
| C. | shape of particles |
| D. | refractoriness |
| Answer» B. the temperature | |
| 18. |
Plaster patterns and core boxes are made of |
| A. | White powder |
| B. | Plaster of Paris |
| C. | Gypsum cement |
| D. | Bone china clay |
| Answer» D. Bone china clay | |
| 19. |
The advantage of investment casting is |
| A. | high degree of accuracy |
| B. | adaptability to casting of most of the metals |
| C. | complex shaped articles can be cast |
| D. | all of the above |
| Answer» E. | |
| 20. |
Scabs may be caused by |
| A. | low permeability of sand |
| B. | high moisture content of sand |
| C. | intermittent running of molten metal over the sand surface |
| D. | any of the above |
| Answer» E. | |
| 21. |
In furan process, furan resins are primarily used as |
| A. | binders |
| B. | chemicals for exothermic reactions |
| C. | fluxes |
| D. | none of the above |
| Answer» B. chemicals for exothermic reactions | |
| 22. |
Which of the following statement about gates is incorrect? |
| A. | he size of gate depends upon the rate of solidification |
| B. | More than one gate may be used to feed a fast freezing casting |
| C. | A gate should not have sharp edges |
| D. | A small gate is used for castings which solidify rapidly |
| Answer» F. | |
| 23. |
The disadvantage in using wood as the material for pattern making is |
| A. | it is lighter than the metal to be cast |
| B. | its different strength along the grains and across the grains |
| C. | its low cost |
| D. | it gets warped when not stored properly |
| Answer» F. | |
| 24. |
All of the following are clamping tools EXCEPT |
| A. | Pich dog |
| B. | C-clamp |
| C. | Hard screw |
| D. | Brace |
| Answer» E. | |
| 25. |
The contraction allowance for magnesium is around |
| A. | 5 mm/metre |
| B. | 14 mm/metre |
| C. | 25 mm/metre |
| D. | 1 mm/metre |
| Answer» C. 25 mm/metre | |
| 26. |
The order of surface finish possible in die castings is |
| A. | 0.08 microns |
| B. | 0.008 microns |
| C. | 0.0008 microns |
| D. | 0.8 microns |
| Answer» F. | |
| 27. |
In case of arc furnaces electric supply for electrodes consists of |
| A. | low voltage and high current |
| B. | low voltage and low current |
| C. | high voltage and high current |
| D. | high voltage and low current |
| Answer» B. low voltage and low current | |
| 28. |
Hot blast of air is supplied to the blast furnace through |
| A. | spout |
| B. | stoves |
| C. | prop |
| D. | tuyers |
| Answer» E. | |
| 29. |
Sand is broadly specified by |
| A. | grain size |
| B. | colour |
| C. | moisture content |
| D. | all of the above together |
| Answer» B. colour | |
| 30. |
Pattern draft for external surfaces is (in mm/m) |
| A. | 15 -- 50 |
| B. | 10 -- 25 |
| C. | 40 - 60 |
| Answer» D. | |
| 31. |
Presence of sulphur in cast iron |
| A. | retards fluidity |
| B. | promotes brittleness |
| C. | promotes oxidation |
| D. | all of the above |
| Answer» E. | |
| 32. |
The sand mass does not fall out of the moulding box but is held firmly in it when the moulding box is lifted. This is due to the property of |
| A. | adhesiveness of sand |
| B. | plasticity of sand |
| C. | porosity of sand |
| D. | refractoriness of sand |
| Answer» B. plasticity of sand | |
| 33. |
Pig iron is obtained from iron ore, in a blast furnace by the process of |
| A. | oxidation |
| B. | desulphurisation |
| C. | reduction |
| D. | carbonation |
| Answer» E. | |
| 34. |
Cohesiveness of sand depends on |
| A. | grain size and shape of sand particles |
| B. | bonding material |
| C. | moisture content |
| D. | all of the above |
| Answer» E. | |
| 35. |
Shatter test is a measure of |
| A. | sand toughness |
| B. | sand adhesiveness |
| C. | sand cohesiveness |
| D. | none of the above |
| Answer» B. sand adhesiveness | |
| 36. |
Clay content of green sand is usually |
| A. | 5 to 10 percent |
| B. | 1 to 3 percent |
| C. | 30 to 50 percent |
| D. | 18 to 30 percent |
| Answer» F. | |
| 37. |
Which of the following defect may occur due to improper design of gating system? |
| A. | Cold shuts |
| B. | Rough surfaces |
| C. | Misruns |
| D. | any of the above |
| Answer» E. | |
| 38. |
The sprue pin/sprue hole used for sand moulds is |
| A. | Tapered downwards |
| B. | Has no taper at all |
| C. | Tapered upwards |
| Answer» C. Tapered upwards | |
| 39. |
The thicker sections of casting will have a tendency to have |
| A. | grains coarser than thinner sections |
| B. | grains finer than thinner sections |
| C. | grains of sme size as rest of the casting |
| D. | none of the above |
| Answer» B. grains finer than thinner sections | |
| 40. |
Shell moulding is uneconomical for |
| A. | small castings |
| B. | large scale production |
| C. | small scale production |
| D. | all of the above |
| Answer» D. all of the above | |
| 41. |
Moulding sand properties that depend upon size and shape of grains and bonding material are |
| A. | plasticity and adhesiveness |
| B. | cohesiveness and permeability |
| C. | permeability and plasticity |
| D. | adhesiveness and cohesiveness |
| Answer» C. permeability and plasticity | |
| 42. |
The moulding tool used for finishing/repairing the sand mould after pattern withdrawal is termed as |
| A. | Slincks |
| B. | Lifters or cleaners |
| C. | Trowels |
| Answer» E. | |
| 43. |
The sand used for filling the bulk of the moulding flask |
| A. | Facing sand |
| B. | Dry-sand |
| C. | Floor sand |
| Answer» E. | |
| 44. |
The amount of coal dust added to moulding sand depends on |
| A. | shape of the casting |
| B. | thickness of the casting |
| C. | temperature of pouring |
| D. | none of the above |
| Answer» C. temperature of pouring | |
| 45. |
If dross and slag along with the liquid metal reach the mould cavity they produce the defect known as |
| A. | misrun |
| B. | inclusions |
| C. | blow holes |
| D. | all of the above |
| Answer» C. blow holes | |
| 46. |
Thermal efficiency of cupola is in the range |
| A. | 30 to 50 percent |
| B. | 60 to 75 percent |
| C. | 50 to 65 percent |
| D. | 80 to 90 percent |
| Answer» B. 60 to 75 percent | |
| 47. |
Composition of cast iron can be better controlled when melted in |
| A. | pit furnace |
| B. | cupola |
| C. | arc furnace |
| D. | none of the above |
| Answer» D. none of the above | |
| 48. |
Which of the following defect is likely to occur due to improper design of gatting system? |
| A. | Shrinkage |
| B. | Porosity |
| C. | Mould erosion |
| D. | any of the above |
| Answer» E. | |
| 49. |
The strength of the sand is high if grains are |
| A. | round and small |
| B. | sharp and irregular in shape |
| C. | large and regular in shape |
| D. | none of the above |
| Answer» C. large and regular in shape | |
| 50. |
In melting of aluminium, the dross consists of |
| A. | oxides of aluminium, magnesium etc. |
| B. | sand and dust |
| C. | lighter material |
| D. | none of the above |
| Answer» B. sand and dust | |