MCQOPTIONS
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MCQOPTIONS
This section includes 303 Mcqs, each offering curated multiple-choice questions to sharpen your Mechanical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The heater in the vacuum forming process is heated up to 90°C. |
| A. | true |
| B. | false |
| Answer» B. false | |
| 2. |
In inertia friction welding energy of welding machine is used. |
| A. | electrical |
| B. | potential |
| C. | rotational |
| D. | frictional |
| Answer» D. frictional | |
| 3. |
Friction welding produces quality joints, with a 100% weld. |
| A. | lap joint |
| B. | tee-joint |
| C. | butt joint |
| D. | edge joint |
| Answer» D. edge joint | |
| 4. |
Friction welding is process. |
| A. | costly |
| B. | cost saving |
| C. | time consuming |
| D. | highly material selective |
| Answer» C. time consuming | |
| 5. |
All metallic engineering materials which are can be friction welded. |
| A. | soft |
| B. | weldable |
| C. | forgeable |
| D. | metamaterials |
| Answer» D. metamaterials | |
| 6. |
In friction welding process, materials are joined by motion between materials. |
| A. | rectilinear |
| B. | rubbing |
| C. | translatory |
| D. | brownian |
| Answer» C. translatory | |
| 7. |
Binding property of the sand increases because of the property. |
| A. | cohesiveness |
| B. | collapsibility |
| C. | flow ability |
| D. | permeability |
| Answer» B. collapsibility | |
| 8. |
The property ensures the removal of excess sand in the mould box. |
| A. | adhesiveness |
| B. | cohesiveness |
| C. | green strength |
| D. | compressive strength |
| Answer» B. cohesiveness | |
| 9. |
The is responsible for the impact strength in the molding sand. |
| A. | aggregates |
| B. | refractoriness |
| C. | impurities |
| D. | permeability |
| Answer» B. refractoriness | |
| 10. |
When forming “Z” sections, the product is twisted in the opposite direction to compensate the machine generated twist. |
| A. | true |
| B. | false |
| Answer» B. false | |
| 11. |
°C. |
| A. | true |
| B. | false |
| Answer» B. false | |
| 12. |
Which of the following is also called “gas welding”? |
| A. | oxy fuel gas welding |
| B. | metallic welding |
| C. | arc welding |
| D. | fuel gas welding |
| Answer» B. metallic welding | |
| 13. |
Which of the type of centrifugal casting methods is used to produce ‘non- symmetrical’ shaped castings? |
| A. | true centrifugal casting |
| B. | semi centrifugal casting |
| C. | centrifuging |
| D. | non centrifugal casting |
| Answer» D. non centrifugal casting | |
| 14. |
What is “leg length” or “leg height”? |
| A. | the maximum vertical dimension of the profile |
| B. | total length of the product |
| C. | excess length of the product |
| D. | maximum width of the section |
| Answer» B. total length of the product | |
| 15. |
Which of the following is true in case of “too quick” forming (too few passes)? |
| A. | it makes the tooling and the process uneconomical |
| B. | it makes process easier |
| C. | it distorts the product |
| D. | eliminate the need of a skilled operator |
| Answer» D. eliminate the need of a skilled operator | |
| 16. |
The heater in the vacuum forming process is heated up to 90°C. |
| A. | true |
| B. | false |
| Answer» B. false | |
| 17. |
There is a varied pressure provided in the solidification unit of injection molding process. |
| A. | true |
| B. | false |
| Answer» C. | |
| 18. |
Where does the granular molding material get loaded into? |
| A. | barrel |
| B. | hopper |
| C. | pellets |
| D. | split |
| Answer» C. pellets | |
| 19. |
Thermosetting materials are the polymeric materials which get soften on heating with or without pressure. |
| A. | true |
| B. | false |
| Answer» C. | |
| 20. |
Polyurethanes plastics can be made in flexible foams even after belonging to thermosetting polymers. |
| A. | true |
| B. | false |
| C. | topic 5.2 injection moulding - plunger and screw machines |
| Answer» B. false | |
| 21. |
What is the minimum curing time required in a compression molding process? |
| A. | 0.4 minutes |
| B. | 0.5 minutes |
| C. | 0.6 minutes |
| D. | 0.7 minutes |
| Answer» C. 0.6 minutes | |
| 22. |
The joints made by an electromagnetic forming process are much stronger than the parent material. |
| A. | true |
| B. | false |
| Answer» B. false | |
| 23. |
What is the maximum pressure required in a transfer molding process? |
| A. | 80 mpa |
| B. | 90 mpa |
| C. | 100 mpa |
| D. | 120 mpa |
| Answer» D. 120 mpa | |
| 24. |
What is the minimum pressure required in a compression molding process? |
| A. | 0.5 mpa |
| B. | 1 mpa |
| C. | 1.5 mpa |
| D. | 2 mpa |
| Answer» B. 1 mpa | |
| 25. |
The efficiency of electromagnetic forming mainly depends on the resistivity of material being formed. |
| A. | true |
| B. | false |
| Answer» B. false | |
| 26. |
Electromagnetic forming cannot be used for materials of poor electrical conductivity. |
| A. | true |
| B. | false |
| Answer» C. | |
| 27. |
In electromagnetic forming, highly intense magnetic field is used for the forming process. |
| A. | true |
| B. | false |
| Answer» B. false | |
| 28. |
Which of the following is not a cold extrusion process? |
| A. | cold extrusion forging |
| B. | impact extrusion |
| C. | hydrostatic extrusion |
| D. | cold rolling |
| Answer» D. cold rolling | |
| 29. |
Which of the following is not used because of the problem of handling extruded metal coming out through moving ram? |
| A. | direct |
| B. | indirect |
| C. | impact |
| D. | hydrostatic |
| Answer» C. impact | |
| 30. |
In which extrusion process the direction of flow of metal is in same direction as that of ram? |
| A. | direct |
| B. | indirect |
| C. | impact |
| D. | hydrostatic |
| Answer» B. indirect | |
| 31. |
Which of the following is true about the extrusion process? |
| A. | structure is homogeneous |
| B. | no time is lost in changing the shape |
| C. | service life of extrusion tool is too high |
| D. | its leading end is in good shape as compared to rolling |
| Answer» C. service life of extrusion tool is too high | |
| 32. |
A cone shaped die is used in the orbital forging for the forging of metal parts. |
| A. | true |
| B. | false |
| Answer» B. false | |
| 33. |
In impression die forging process, extra deformed material is produced which is called a flash. |
| A. | true |
| B. | false |
| Answer» B. false | |
| 34. |
The open die forging process is also known as upsetting or upset forging process. |
| A. | true |
| B. | false |
| Answer» B. false | |
| 35. |
In general, the casted metal part is much stronger and tougher than that produced by the forging operation. |
| A. | true |
| B. | false |
| Answer» C. | |
| 36. |
Forging is a metal forming operation in which the metal is stretched to form the desired shape of a metal part. |
| A. | true |
| B. | false |
| Answer» C. | |
| 37. |
In inertia friction welding              energy of welding machine is used. |
| A. | electrical |
| B. | potential |
| C. | rotational |
| D. | frictional |
| Answer» D. frictional | |
| 38. |
Friction welding produces quality joints, with a 100% Â Â Â Â Â Â Â Â Â Â Â weld. |
| A. | lap joint |
| B. | tee-joint |
| C. | butt joint |
| D. | edge joint |
| Answer» D. edge joint | |
| 39. |
Friction welding is            process. |
| A. | costly |
| B. | cost saving |
| C. | time consuming |
| D. | highly material selective |
| Answer» C. time consuming | |
| 40. |
All metallic engineering materials which are            can be friction welded. |
| A. | soft |
| B. | weldable |
| C. | forgeable |
| D. | metamaterials |
| Answer» D. metamaterials | |
| 41. |
In friction welding process, materials are joined by            motion between materials. |
| A. | rectilinear |
| B. | rubbing |
| C. | translatory |
| D. | brownian |
| Answer» C. translatory | |
| 42. |
In flash butt welding, the forced out metal is called flash. |
| A. | true |
| B. | false |
| Answer» B. false | |
| 43. |
Up to what thickness, can steel be welded using spot welding process? |
| A. | 10 mm |
| B. | 11 mm |
| C. | 12 mm |
| D. | 13 mm |
| Answer» D. 13 mm | |
| 44. |
How are the metals to be welded connected to each other in spot welding? |
| A. | electric contact |
| B. | magnetic field |
| C. | mechanical pressure |
| D. | direct contact |
| Answer» D. direct contact | |
| 45. |
Which kind of resistance is experienced in upset butt welding? |
| A. | electric resistance |
| B. | magnetic resistance |
| C. | thermal resistance |
| D. | air resistance |
| Answer» B. magnetic resistance | |
| 46. |
Which of the following inert gas is used with DC power supply only? |
| A. | argon |
| B. | helium |
| C. | co2 |
| D. | nitrogen |
| Answer» D. nitrogen | |
| 47. |
What is the only difference between Plasma arc welding and TIG welding? |
| A. | flux is not used |
| B. | construction of torch is different |
| C. | gas is not used |
| D. | tungsten electrode is not used |
| Answer» C. gas is not used | |
| 48. |
If the open circuit voltage is 60 volt and the short circuit current is 20 amperes. Then determine the voltage required for welding if the current required during welding is 10 amperes? |
| A. | 30 v |
| B. | 60 v |
| C. | 20 v |
| D. | 40 v |
| Answer» B. 60 v | |
| 49. |
In which of the following type of flame, oxygen is of same proportion with acetylene? |
| A. | neutral flame |
| B. | oxidizing flame |
| C. | carburizing flame |
| D. | both oxidizing flame and carburizing flame |
| Answer» B. oxidizing flame | |
| 50. |
Which of the following welding process in which two pieces to be joined are overlapped and placed between two pointed electrodes? |
| A. | seam welding |
| B. | resistance welding |
| C. | projection welding |
| D. | spot welding |
| Answer» E. | |