MCQOPTIONS
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MCQOPTIONS
This section includes 149 Mcqs, each offering curated multiple-choice questions to sharpen your Automobile Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
In electro-discharge machining, the tool is connected to cathode. |
| A. | Correct |
| B. | Incorrect |
| Answer» B. Incorrect | |
| 2. |
In electro-discharge machining, tool is made of |
| A. | brass |
| B. | copper |
| C. | copper tungsten alloy |
| D. | all of these |
| Answer» E. | |
| 3. |
In electro-chemical machining, the gap between the tool and work is kept as |
| A. | 0.1 mm |
| B. | 0.25 mm |
| C. | 0.4 mm |
| D. | 0.75 mm |
| Answer» E. | |
| 4. |
Ultra-sonic machining is best suited for |
| A. | tool steels |
| B. | sintered carbides |
| C. | glass |
| D. | all of these |
| Answer» E. | |
| 5. |
In ultra-sonic machining, tool is made of |
| A. | tungsten carbide |
| B. | brass or copper |
| C. | diamond |
| D. | stainless steel |
| Answer» C. diamond | |
| 6. |
The abrasive slurry used in ultra-sonic machining contains fine particles of |
| A. | aluminium oxide |
| B. | boron carbide |
| C. | silicon carbide |
| D. | any one of these |
| Answer» E. | |
| 7. |
In hot machining, solid carbide tools are preferred over high speed steel tools. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 8. |
Holes are machined by push broaches only for sizing. |
| A. | Correct |
| B. | Incorrect |
| Answer» B. Incorrect | |
| 9. |
Jigs are heavier than fixtures in construction. |
| A. | Yes |
| B. | No |
| Answer» C. | |
| 10. |
In __________ operation, the cutting force is maximum when the tooth begins its cut and reduces it to minimum when the tooth leaves the work. |
| A. | up milling |
| B. | down milling |
| C. | face milling |
| D. | end milling |
| Answer» C. face milling | |
| 11. |
In conventional milling, the cutting force tends to lift the work. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 12. |
In __________ operation, the chip thickness is minimum at the beginning of the cut and it reaches to the maximum when the cut terminates. |
| A. | conventional milling |
| B. | climb milling |
| C. | face milling |
| D. | end milling |
| Answer» B. climb milling | |
| 13. |
Which of the following statement is correct as regard to up milling? |
| A. | It can not be used on old machines due to backlash between the feed screw of the table and the nut. |
| B. | The chips are disposed off easily and do not interfere with the cutting. |
| C. | The surface milled appears to be slightly wavy. |
| D. | The coolant can be poured directly at the cutting zone where the cutting force is maximum. |
| Answer» D. The coolant can be poured directly at the cutting zone where the cutting force is maximum. | |
| 14. |
Up milling is also called conventional milling. |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 15. |
The operation of reproduction of an outline of a template on a workpiece is called face milling. |
| A. | Yes |
| B. | No |
| Answer» C. | |
| 16. |
The cutting force in up milling __________ per tooth movement of the cutter. |
| A. | is zero |
| B. | is maximum |
| C. | decreases from maximum to zero |
| D. | increases from zero to maximum |
| Answer» E. | |
| 17. |
The cutting force in down milling is maximum when the tooth begins its cut and reduces to minimum when the tooth leaves the work. |
| A. | Correct |
| B. | Incorrect |
| Answer» B. Incorrect | |
| 18. |
The plain milling machine is more rigid and heavier in construction than a universal milling machine of the same size. |
| A. | Correct |
| B. | Incorrect |
| Answer» B. Incorrect | |
| 19. |
In a universal milling machine, the table can be swiveled horizontally and can be fed at an angle to the milling machine spindle. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 20. |
Buffing wheels are made of |
| A. | softer metals |
| B. | cotton fabric |
| C. | carbon |
| D. | graphite |
| Answer» C. carbon | |
| 21. |
The grinding operaion is a |
| A. | shaping operation |
| B. | forming operation |
| C. | surface finishing operation |
| D. | dressing operation |
| Answer» D. dressing operation | |
| 22. |
In lapping operaion, the amount of metal removed is |
| A. | 0.005 to 0.01 mm |
| B. | 0.01 to 0.1 mm |
| C. | 0.05 to 0.1 mm |
| D. | 0.5 to 1 mm |
| Answer» B. 0.01 to 0.1 mm | |
| 23. |
The dressing and truing of grinding wheel are done with the same tools but not for the same purpose. |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 24. |
A dense structure of a grinding wheel is denoted by the number 9 to 15 or higher. |
| A. | Yes |
| B. | No |
| Answer» C. | |
| 25. |
An open structure of a grinding wheel is denoted by the number 1 to 8. |
| A. | Correct |
| B. | Incorrect |
| Answer» C. | |
| 26. |
A grinding wheel is said to be of __________ if the abrasive grains can be easily dislodged. |
| A. | soft grade |
| B. | medium grade |
| C. | hard grade |
| Answer» B. medium grade | |
| 27. |
A grinding wheel is said to be of __________ if it holds the abrasive grains more securely. |
| A. | soft grade |
| B. | medium grade |
| C. | hard grade |
| Answer» D. | |
| 28. |
A __________ grinding wheel is used to grind soft materials. |
| A. | coarse grained |
| B. | medium grained |
| C. | finegrained |
| Answer» B. medium grained | |
| 29. |
When the grinding wheel is marked by the letters from I to P, it indicates that the grinding wheel is of hard grade. |
| A. | True |
| B. | False |
| Answer» C. | |
| 30. |
For fast removal of materials during grinding, a __________ grinding wheel is used. |
| A. | coarse grained |
| B. | fine grained |
| C. | medium grained |
| Answer» B. fine grained | |
| 31. |
To grind brittle materials, a coarse grained grinding wheel is used. |
| A. | Agree |
| B. | Disagree |
| Answer» C. | |
| 32. |
The infeed grinding is similar to plunge grinding. |
| A. | Yes |
| B. | No |
| Answer» B. No | |
| 33. |
The method of centreless grinding used to produce taper is |
| A. | infeed grinding |
| B. | through feed grinding |
| C. | endfeed grinding |
| D. | any one of these |
| Answer» D. any one of these | |
| 34. |
The infeed grinding is used to |
| A. | produce tapers |
| B. | grind shoulders and formed surfaces |
| C. | grind long, slender shafts or bars |
| D. | ail of these |
| Answer» C. grind long, slender shafts or bars | |
| 35. |
Which of the following parameters influence the axial feed rate in centreless grinding? |
| A. | Regulating wheel diameter |
| B. | Speed of the regulating wheel |
| C. | Angle between the axes of grinding and regulating wheels |
| D. | all of the above |
| Answer» E. | |
| 36. |
The actual feed in centreless grinders is given by (where d = Dia. of regulating wheel, n = Revolutions per minute, and α = Angle of inclination of wheel) |
| A. | πd |
| B. | πd n |
| C. | πd n sin α |
| D. | πd n cos α |
| Answer» D. πd n cos α | |
| 37. |
In centreless grinders, the maximum angular adjustment of the regulating wheel is |
| A. | 5° |
| B. | 10° |
| C. | 15° |
| D. | 20° |
| Answer» C. 15° | |
| 38. |
In centreless grinders, the regulating wheel is inclined at |
| A. | 0° to 8° |
| B. | 9° to 15° |
| C. | 16° to 20° |
| D. | 21° to 25° |
| Answer» B. 9° to 15° | |
| 39. |
The plunge grinding requires very __________ speed. |
| A. | high |
| B. | low |
| Answer» C. | |
| 40. |
The form grinding is used to grind gear teeth, threads, splined shafts and holes. |
| A. | Correct |
| B. | Incorrect |
| Answer» B. Incorrect | |
| 41. |
The keyways, grooves and slots cannot be cut on a shaper. |
| A. | True |
| B. | False |
| Answer» C. | |
| 42. |
Gears can be cut on a shaper. |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 43. |
The enlarging of an existing circular hole with a rotating single point tool is called |
| A. | boring |
| B. | drilling |
| C. | reaming |
| D. | internal turning |
| Answer» B. drilling | |
| 44. |
The effect of setting a boring tool above centre height leads to |
| A. | increase in the effective rake angle and a decrease in the effective clearance angle |
| B. | increase in both effective rake angle and effective clearance angle |
| C. | decrease in the effective rake angle and an increase in the effective clearance angle |
| D. | decrease in both effective rake angle and effective clearance angle |
| Answer» B. increase in both effective rake angle and effective clearance angle | |
| 45. |
A drill bit of 20 mm diameter rotating at 500 r.p.m. with a feed rate of 0.2 mm/revolution is used to drill a through-hole in a mild steel plate 20 mm thickness. The depth of cut in this drilling operation is |
| A. | 0.2 mm |
| B. | 10 mm |
| C. | 20 mm |
| D. | 100 mm |
| Answer» D. 100 mm | |
| 46. |
The time (in minutes) for a drilling a hole is given by where h is the |
| A. | length of the drill |
| B. | drill diameter |
| C. | flute length of the drill |
| D. | cone height of the drill |
| Answer» E. | |
| 47. |
High speed steel drills can be operated at about __________ the speed of high carbon steel drills. |
| A. | one-half |
| B. | one-fourth |
| C. | double |
| D. | four times |
| Answer» D. four times | |
| 48. |
The hole to be drilled for tapping is __________ the outside diameter of the thread on the tap. |
| A. | equal to |
| B. | smaller than |
| C. | greater than |
| Answer» C. greater than | |
| 49. |
In drilling softer materials, the cutting speed is __________ as compared to harder materials. |
| A. | same |
| B. | low |
| C. | high |
| Answer» D. | |
| 50. |
The cutting speed is zero at the periphery and it is maximum at the centre of the drill. |
| A. | Yes |
| B. | No |
| Answer» C. | |