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. |
In blanking operation, the clearance is provided on |
| A. | punch |
| B. | die |
| C. | half on the punch and half on the die |
| D. | either on punch or die depending upon designer's choice |
| Answer» B. die | |
| 2. |
In piercing operation, the clearance is provided on |
| A. | punch |
| B. | die |
| C. | half on the punch and half on the die |
| D. | either on punch or die depending upon designer's choice |
| Answer» C. half on the punch and half on the die | |
| 3. |
According to Indian standard specifications, 100 H6/g 5 means that. |
| A. | basic size is 100 mm |
| B. | actual size is 100 mm |
| C. | difference between the actual size and basic size is 100 mm |
| D. | none of the above |
| Answer» B. actual size is 100 mm | |
| 4. |
Cast iron and steel pipes are produced by |
| A. | slush casting |
| B. | investment casting |
| C. | true centrifugal casting |
| D. | die casting |
| Answer» D. die casting | |
| 5. |
If an aluminium pattern made from a wooden master pattern is to be used for grey iron castings, then the shrinkage allowance allowed on the wooden pattern should be |
| A. | 10 mm/m |
| B. | 16 mm/m |
| C. | 20 mm/m |
| D. | 26 mm/m |
| Answer» E. | |
| 6. |
The oxidising flame is similar to neutral flame but the inner cone is less luminous and shorter. |
| A. | Yes |
| B. | No |
| Answer» B. No | |
| 7. |
The edge of a steel plate cut by oxygen cutting will get hardened when the carbon content is |
| A. | less than 0.1 percent |
| B. | less than 0.3 percent |
| C. | more than 0.3 percent |
| D. | any where between 0.1 to 1 percent |
| Answer» D. any where between 0.1 to 1 percent | |
| 8. |
The property of sand due to which the sand grains stick together, is called |
| A. | collapsibility |
| B. | permeability |
| C. | cohesiveness |
| D. | adhesiveness |
| Answer» D. adhesiveness | |
| 9. |
A pattern is used to make the mould cavity for pouring the molten metal for casting. |
| A. | Yes |
| B. | No |
| Answer» B. No | |
| 10. |
The surface to be left unmachined is marked on the pattern by |
| A. | red colour |
| B. | yellow colour |
| C. | black colour |
| D. | blue colour |
| Answer» D. blue colour | |
| 11. |
The two rolls in a two high rolling mills are of __________ size. |
| A. | equal |
| B. | different |
| Answer» B. different | |
| 12. |
The welding process used in joining mild steel shanks to high speed drills, is |
| A. | spot welding |
| B. | seam welding |
| C. | flash butt welding |
| D. | upset butt welding |
| Answer» D. upset butt welding | |
| 13. |
In order to ram the sand harder at the back of the mould and softer on the pattern face, a __________ is used. |
| A. | sand slinger |
| B. | squeezing machine |
| C. | jolt machine |
| D. | stripper plate machine |
| Answer» C. jolt machine | |
| 14. |
The acetylene cylinder is usually painted with |
| A. | black colour |
| B. | white colour |
| C. | maroon colour |
| D. | yellow colour |
| Answer» D. yellow colour | |
| 15. |
The metal extrusion process is generally used for producing |
| A. | uniform solid sections |
| B. | uniform hollow sections |
| C. | uniform solid and hollow sections |
| D. | varying solid and hollow sections |
| Answer» D. varying solid and hollow sections | |
| 16. |
The temperature produced by oxy-hydrogen flame is about |
| A. | 1800 C |
| B. | 2100 C |
| C. | 2400 C |
| D. | 3200 C |
| Answer» D. 3200 C | |
| 17. |
When the file is moved to and fro over the work, it is known as |
| A. | cross filing |
| B. | draw filing |
| C. | pull and push filing |
| D. | none of these |
| Answer» C. pull and push filing | |
| 18. |
For arc welding |
| A. | alternating current with high frequency is used |
| B. | alternating current with low frequency is used |
| C. | direct current is used |
| D. | any one of these |
| Answer» D. any one of these | |
| 19. |
The mode of deformation of the metal during spinning is |
| A. | bending |
| B. | stretching |
| C. | rolling and stretching |
| D. | bending and stretching |
| Answer» E. | |
| 20. |
When the molten metal is fed in the cavity of a metallic mould by gravity, the method of casting is known as |
| A. | die casting method |
| B. | slush casting method |
| C. | permanent mould casting method |
| D. | centrifugal casting method |
| Answer» D. centrifugal casting method | |
| 21. |
Hot piercing is extensively used for making bolts and nuts. |
| A. | Yes |
| B. | No |
| Answer» C. | |
| 22. |
The difference between the upper limit and lower limt of a dimension is called |
| A. | nominal size |
| B. | basic size |
| C. | actual size |
| D. | tolerance |
| Answer» E. | |
| 23. |
Green sand is a mixture of |
| A. | 30% sand and 70% clay |
| B. | 50% sand and 50% clay |
| C. | 70% sand and 30% clay |
| D. | 90% sand and 10% clay |
| Answer» D. 90% sand and 10% clay | |
| 24. |
The diaphragm moulding machine is used to |
| A. | ram the sand harder at the pattern face with decreasing hardness towards the back of the mould |
| B. | ram the sand harder at the back of the mould and softer on the pattern face |
| C. | produce uniform packing of sand in the mould |
| D. | give uniform sand hardness throughout the mould |
| Answer» E. | |
| 25. |
The temperature of the inner luminous cone of neutral flame is about |
| A. | 1000 C |
| B. | 1250 C |
| C. | 2100 C |
| D. | 3200 C |
| Answer» E. | |
| 26. |
The metal patterns as compared to wooden patterns require less |
| A. | shrinkage allowance |
| B. | machining allowance |
| C. | draft allowance |
| D. | distortion allowance |
| Answer» D. distortion allowance | |
| 27. |
When the dimension is expressed as , then the basic size is |
| A. | 20 mm |
| B. | 20.035 mm |
| C. | 20.025 mm |
| D. | 19.975 mm |
| Answer» B. 20.035 mm | |
| 28. |
In order to produce uniform packing of sand in the moulds, a __________ is used. |
| A. | sand slinger |
| B. | squeezing machine |
| C. | jolt machine |
| D. | stripper plate machine |
| Answer» B. squeezing machine | |
| 29. |
The process of decreasing the cross-section of a bar and increasing its length, is called |
| A. | drawing down |
| B. | upsetting |
| C. | spinning |
| D. | peening |
| Answer» B. upsetting | |
| 30. |
A casting defect which occurs due to improper venting of sand is known as |
| A. | cold shuts |
| B. | blow holes |
| C. | shift |
| D. | swell |
| Answer» C. shift | |
| 31. |
Swab is used for |
| A. | smoothing and cleaning out depressions in the mould |
| B. | cleaning the moulding sand |
| C. | moistening the sand around the edge before removing pattern |
| D. | reinforcement of sand in the top part of the moulding box |
| Answer» D. reinforcement of sand in the top part of the moulding box | |
| 32. |
In a four high rolling mill, the diameter of backing up rolls is __________ the diameter of working rolls. |
| A. | equal to |
| B. | smaller than |
| C. | larger than |
| Answer» D. | |
| 33. |
The hot working of metals is carried out |
| A. | at the recrystallisation temperature |
| B. | below the recrystallisation temperature |
| C. | above the recrystallisation temperature |
| D. | at any temperature |
| Answer» D. at any temperature | |
| 34. |
Cold working distorts grain structure and does not provide an appreciable reduction in size. |
| A. | Correct |
| B. | Incorrect |
| Answer» B. Incorrect | |
| 35. |
The welding process used to join the ends of two pipes of uniform cross-section, is |
| A. | spot welding |
| B. | seam welding |
| C. | projection welding |
| D. | upset butt welding |
| Answer» E. | |
| 36. |
The operation of giving impressions of figures, letters or designs on sheet metal parts, is known as embossing. |
| A. | Correct |
| B. | Incorrect |
| Answer» B. Incorrect | |
| 37. |
The sand used for making cores is |
| A. | green sand |
| B. | dry sand |
| C. | loam sand |
| D. | oil sand |
| Answer» E. | |
| 38. |
Which of the following welding method uses a pool of molten metal? |
| A. | Carbon arc welding |
| B. | Submerged arc welding |
| C. | TIG arc welding |
| D. | MIG arc welding |
| Answer» C. TIG arc welding | |
| 39. |
In a gas welding of mild steel using an oxy-acetylene flame, the total amount of acetylene consumed is 10 litre. The oxygen consumption from the cylinder is |
| A. | 5 litre |
| B. | 10 litre |
| C. | 15 litre |
| D. | 20 litre |
| Answer» C. 15 litre | |
| 40. |
A basic hole is one whose |
| A. | lower deviation is zero |
| B. | upper deviation is zero |
| C. | lower and upper deviations are zero |
| D. | none of these |
| Answer» B. upper deviation is zero | |
| 41. |
A process used for making thin phosphate coating on steel is called parkerising. |
| A. | Correct |
| B. | Incorrect |
| Answer» B. Incorrect | |
| 42. |
A hacksaw blade cuts on the |
| A. | forward stroke |
| B. | return stroke |
| C. | both forward and return strokes |
| D. | cutting depends upon the direction of force |
| Answer» B. return stroke | |
| 43. |
During drawing operation, the states of stress in cup would include |
| A. | compressive stress in the flange |
| B. | tensile stress in the wall |
| C. | both (a) and (b) |
| D. | none of these |
| Answer» D. none of these | |
| 44. |
The surface to be machined is marked on the pattern by |
| A. | red colour |
| B. | yellow colour |
| C. | black colour |
| D. | blue colour |
| Answer» B. yellow colour | |
| 45. |
Seam welding is best adopted for metal thickness ranging from |
| A. | 0.025 to 3 mm |
| B. | 3 to 5 mm |
| C. | 5 to 8 mm |
| D. | 8 to 10 mm |
| Answer» B. 3 to 5 mm | |
| 46. |
In electric resistance welding, pressure applied varies from |
| A. | 1 to 5 MPa |
| B. | 5 to 10 MPa |
| C. | 10 to 25 MPa |
| D. | 25 to 55 MPa |
| Answer» E. | |
| 47. |
In order to deliver molten metal from pouring basin to gate, a __________ is used. |
| A. | riser |
| B. | sprue |
| C. | core |
| Answer» C. core | |
| 48. |
Structural sections such as rails, angles, I-beams are made by |
| A. | hot rolling |
| B. | hot drawing |
| C. | hot piercing |
| D. | hot extrusion |
| Answer» B. hot drawing | |
| 49. |
If the valve clearances are excessively large, the problem that can arise is |
| A. | overheating of the engine |
| B. | incomplete valve closure |
| C. | fouling of spark plug by gasoline |
| D. | none of these |
| Answer» C. fouling of spark plug by gasoline | |
| 50. |
The power source for a brake booster is |
| A. | exhaust manifold pressure |
| B. | electricity |
| C. | the pressure difference between the atmospheric pressure and the vaccum pressure in the intake manifold |
| D. | hydraulic pump |
| Answer» D. hydraulic pump | |