MCQOPTIONS
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MCQOPTIONS
This section includes 180 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. |
In which of the following milling machine, the table can be tilted in a vertical plane by providing a swivel arrangement at the knee? |
| A. | Universal milling machine |
| B. | Plain milling machine |
| C. | Omniversal milling machine |
| D. | Hand milling machine |
| Answer» D. Hand milling machine | |
| 2. |
A coarse grained grinding wheel is used to grind |
| A. | hard and brittle materials |
| B. | soft and ductile materials |
| C. | hard and ductile materials |
| D. | soft and brittle materials |
| Answer» C. hard and ductile materials | |
| 3. |
A right hand tool on a lathe cuts most efficiently when it travels |
| A. | from left to right end of the lathe bed |
| B. | from right to left end of the lathe bed |
| C. | with the help of a compound slide |
| D. | across the bed |
| Answer» C. with the help of a compound slide | |
| 4. |
Dielectric is used in |
| A. | electro-chemical machining |
| B. | ultra-sonic machining |
| C. | electro-discharge machining |
| D. | laser machining |
| Answer» D. laser machining | |
| 5. |
The type of reamer used for reaming soft aluminium or copper, is |
| A. | straight fluted reamer |
| B. | left hand spiral fluted reamer |
| C. | right hand spiral fluted reamer |
| D. | any one of these |
| Answer» C. right hand spiral fluted reamer | |
| 6. |
The tool material, for faster machining, should have |
| A. | wear resistance |
| B. | red hardness |
| C. | toughness |
| D. | all of these |
| Answer» E. | |
| 7. |
The snag grinding is done |
| A. | to produce good surface finish and high degree of accuracy |
| B. | to remove considerable amount of metal without regard to accuracy of the finished surface |
| C. | to grind exterior cylindrical surfaces |
| D. | any one of the above |
| Answer» C. to grind exterior cylindrical surfaces | |
| 8. |
The velocity of tool along the tool face is known as |
| A. | shear velocity |
| B. | chip velocity |
| C. | cutting velocity |
| D. | mean velocity |
| Answer» C. cutting velocity | |
| 9. |
The purpose of jigs and fixtures is to |
| A. | increase machining accuracy |
| B. | facilitate interchangeability |
| C. | decrease expenditure on quality control |
| D. | all of these |
| Answer» E. | |
| 10. |
The lathe spindles are usually made hollow and provided with |
| A. | internal taper |
| B. | external taper |
| C. | internal and external taper |
| D. | no taper |
| Answer» B. external taper | |
| 11. |
In a single point tool, the angle between the surface of the flank immediately below the point and a line drawn from the point perpendicular to the base, is known as |
| A. | side relief angle |
| B. | end relief angle |
| C. | back rake angle |
| D. | side rake angle |
| Answer» C. back rake angle | |
| 12. |
The surface finish is improved by the increase in |
| A. | cutting speed |
| B. | nose radius |
| C. | true rake angle |
| D. | all of these |
| Answer» E. | |
| 13. |
The cutting speed for drilling copper with high speed steel drills varies from |
| A. | 10 to 20 m/min |
| B. | 18 to 30 m/min |
| C. | 24 to 45 m/min |
| D. | 60 to 90 m/min |
| Answer» C. 24 to 45 m/min | |
| 14. |
A taper tap has |
| A. | its end tapered for about three or four threads |
| B. | its end tapered for about eight or ten threads |
| C. | full threads for the whole of its length |
| D. | none of the above |
| Answer» C. full threads for the whole of its length | |
| 15. |
Climb milling is chosen while machining because |
| A. | the chip thickness increase gradually |
| B. | it enables the cutter to dig in and start the cut |
| C. | the specific power consumption is reduced |
| D. | better surface finish can be obtained |
| Answer» C. the specific power consumption is reduced | |
| 16. |
The material which on machining produces chips with built up edge is |
| A. | brittle material |
| B. | tough material |
| C. | hard material |
| D. | ductile material |
| Answer» E. | |
| 17. |
In down milling, the thickness of chip is |
| A. | minimum at the beginning of the cut and maximum at the end of the cut |
| B. | maximum at the beginning of the cut and minimum at the end of the cut |
| C. | uniform throughout the cut |
| D. | none of these |
| Answer» C. uniform throughout the cut | |
| 18. |
The chuck used for setting up of heavy and irregular shaped work should be |
| A. | four jaw independent chuck |
| B. | three jaw universal chuck |
| C. | magnetic chuck |
| D. | drill chuck |
| Answer» B. three jaw universal chuck | |
| 19. |
Ceramic tools are fixed to tool body by |
| A. | soldering |
| B. | brazing |
| C. | welding |
| D. | clamping |
| Answer» C. welding | |
| 20. |
The helix angle of a drill is __________ for drilling brass. |
| A. | equal to 30° |
| B. | less than 30° |
| C. | more than 30° |
| Answer» C. more than 30° | |
| 21. |
As the cutting speed increases, the tool cutting forces |
| A. | remain constant |
| B. | increases |
| C. | decreases |
| D. | first increases and then decreases |
| Answer» D. first increases and then decreases | |
| 22. |
The chamfering is an operation of |
| A. | bevelling the extreme end of a workpiece |
| B. | embossing a diamond shaped pattern on the surface of a workpiece |
| C. | reducing the diameter of a workpiece over a very narrow surface |
| D. | enlarging the end of a hole cylindrically |
| Answer» B. embossing a diamond shaped pattern on the surface of a workpiece | |
| 23. |
The hard grade grinding wheels are denoted by the letters |
| A. | to |
| B. | to |
| C. | to |
| D. | to |
| Answer» D. to | |
| 24. |
The tailstock set over required to turn a taper on the entire length of a workpiece having diameters and is |
| A. | D - d |
| Answer» D. | |
| 25. |
The angle formed by the leading edge of the land with a plane having the axis of the drill, is called |
| A. | helix or rake angle |
| B. | point angle |
| C. | chisel edge angle |
| D. | lip clearance angle |
| Answer» B. point angle | |
| 26. |
The addition of lead, sulphur and phosphorus to low carbon steels, help to |
| A. | reduce built up edge |
| B. | break up chips |
| C. | improve machinability |
| D. | all of these |
| Answer» E. | |
| 27. |
In oblique cutting of metals, the cutting edge of the tool is |
| A. | perpendicular to the workpiece |
| B. | perpendicular to the direction of tool travel |
| C. | parallel to the direction of tool travel |
| D. | inclined at an angle less than 90° to the direction of tool travel |
| Answer» E. | |
| 28. |
The size of a shaper is given by |
| A. | stroke length |
| B. | motor power |
| C. | mass of machine |
| D. | rate size |
| Answer» B. motor power | |
| 29. |
The main purpose of a boring operation, as compared to drilling, is to |
| A. | drill a hole |
| B. | finish the drilled hole |
| C. | correct the hole |
| D. | enlarge the existing hole |
| Answer» E. | |
| 30. |
Chip breakers are used to |
| A. | increase tool life |
| B. | remove chips from bed |
| C. | break the chips into short segments |
| D. | to minimise heat generation |
| Answer» D. to minimise heat generation | |
| 31. |
Which of the following statement is correct for oblique cutting system? |
| A. | The cutting edge is inclined at an angle less than 90° with the normal to the velocity of the tool. |
| B. | Frequently, more than one cutting edges are in action. |
| C. | The chip flows on the tool face at an angle less than 90° with the normal on the cutting edge. |
| D. | all of the above |
| Answer» E. | |
| 32. |
When the tool moves parallel to the lathe axis, the movement is termed as |
| A. | cross feed |
| B. | angular feed |
| C. | longitudinal feed |
| D. | any one of these |
| Answer» D. any one of these | |
| 33. |
In the relation = , the value of n for ceramic tools is |
| A. | 0.1 to 0.2 |
| B. | 0.20 to 0.25 |
| C. | 0.25 to 0.40 |
| D. | 0.40 to 0.55 |
| Answer» E. | |
| 34. |
The size of abrasive grain required in a grinding wheel depends upon the |
| A. | amount of material to be removed |
| B. | hardness of material being ground |
| C. | finish desired |
| D. | all of these |
| Answer» C. finish desired | |
| 35. |
Carbide tipped tools usually have |
| A. | negative rake angle |
| B. | positive rake angle |
| C. | any rake angle |
| D. | no rake angle |
| Answer» B. positive rake angle | |
| 36. |
The saw milling is an operation of |
| A. | producing grooves around the periphery of a cylindrical or conical workpiece |
| B. | producing narrow slots or grooves on a workpiece |
| C. | reproduction of an outline of a template on a workpiece |
| D. | machining several surfaces of a workpiece simultaneously |
| Answer» C. reproduction of an outline of a template on a workpiece | |
| 37. |
The high cutting speed and large rake angle of the tool will result in the formation of |
| A. | continuous chips |
| B. | discontinuous chip |
| C. | continuous chips with built up edge |
| D. | none of these |
| Answer» B. discontinuous chip | |
| 38. |
A grinding wheel becomes glazed (i.e. cutting edge takes a glass-like appearance) due to |
| A. | wear of bond |
| B. | breaking of abrasive grains |
| C. | wear of abrasive grains |
| D. | cracks on grinding wheel |
| Answer» D. cracks on grinding wheel | |
| 39. |
The grade of grinding wheel depends upon |
| A. | hardness of the material being ground |
| B. | speed of wheel and work |
| C. | condition of grinding machine |
| D. | all of these |
| Answer» E. | |
| 40. |
Gears can be best produced on mass production by |
| A. | shaping |
| B. | casting |
| C. | forming |
| D. | hobbing |
| Answer» E. | |
| 41. |
In a plain milling machine, the table can be moved |
| A. | longitudinally |
| B. | crosswise |
| C. | vertically |
| D. | all of these |
| Answer» E. | |
| 42. |
In drilling operation, the metal is removed by |
| A. | shearing |
| B. | extrusion |
| C. | shearing and extrusion |
| D. | shearing and compression |
| Answer» D. shearing and compression | |
| 43. |
A single point tool has |
| A. | rake angle |
| B. | cutting angle |
| C. | lip angle |
| D. | all of these |
| Answer» E. | |
| 44. |
In hot machining, the work is heated by |
| A. | simple heating |
| B. | flame heating |
| C. | induction heating |
| D. | any one of these |
| Answer» E. | |
| 45. |
The tap used to cut threads in a blind hole is |
| A. | taper tap |
| B. | second tap |
| C. | bottoming tap |
| D. | any one of these |
| Answer» D. any one of these | |
| 46. |
A jig is defined as a device which |
| A. | holds and locates a workpiece and guides and controls one or more cutting tools |
| B. | holds and locates a workpiece during an inspection or for a manufacturing operation |
| C. | is used to check the accuracy of workpiece |
| D. | all of the above |
| Answer» B. holds and locates a workpiece during an inspection or for a manufacturing operation | |
| 47. |
Jigs are used |
| A. | for holding and guiding the tool in drilling, reaming or tapping operations |
| B. | for holding the work in milling, grinding, planing or turning operations |
| C. | to check the accuracy of workpiece |
| D. | none of the above |
| Answer» B. for holding the work in milling, grinding, planing or turning operations | |
| 48. |
When the grinding wheel is marked by the letters from to , it indicates that the grinding wheel is of hard grade. |
| A. | True |
| B. | False |
| Answer» C. | |
| 49. |
A 15 mm drilling machine means that it can drill a hole |
| A. | of maximum diameter 15 mm |
| B. | in 15 mm thick plates |
| C. | having cross-sectional area of 15 mm |
| D. | none of these |
| Answer» B. in 15 mm thick plates | |
| 50. |
An open structure of a grinding wheel is used for |
| A. | soft materials |
| B. | tough materials |
| C. | ductile materials |
| D. | all of these |
| Answer» E. | |