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. |
Holes are machined by push broaches only for sizing. |
| A. | Correct |
| B. | Incorrect |
| Answer» B. Incorrect | |
| 2. |
The increase in depth of cut and feed rate __________ surface finish. |
| A. | improves |
| B. | deteriorates |
| C. | does not effect |
| Answer» C. does not effect | |
| 3. |
The broaching operation in which the work moves past the stationary tool is called |
| A. | pull broaching |
| B. | push broaching |
| C. | surface broaching |
| D. | continuous broaching |
| Answer» E. | |
| 4. |
When the shear angle is small |
| A. | path of shear is short and chip is thin |
| B. | path of shear is large and chip is thick |
| C. | path of shear is short and chip is thick |
| D. | path of shear is large and chip is thin |
| Answer» C. path of shear is short and chip is thick | |
| 5. |
The operation performed on a shaper is |
| A. | machining horizontal surface |
| B. | machining vertical surface |
| C. | machining angular surface |
| D. | all of these |
| Answer» E. | |
| 6. |
Chemical milling operation is performed |
| A. | on universal milling machine |
| B. | on plain milling machine |
| C. | in a tank containing an etching solution |
| D. | any one of these |
| Answer» D. any one of these | |
| 7. |
The thrust force will increase with the increase in |
| A. | side cutting edge angle |
| B. | tool nose radius |
| C. | rake angle |
| D. | end cutting edge angle |
| Answer» B. tool nose radius | |
| 8. |
In machining cast iron, no cutting fluid is required. |
| A. | Correct |
| B. | Incorrect |
| Answer» B. Incorrect | |
| 9. |
If the cutting speed is increased, then the built-up-edge |
| A. | becomes longer |
| B. | may or may not form |
| C. | becomes smaller and finally does not form at all |
| D. | has nothing to do with speed |
| Answer» D. has nothing to do with speed | |
| 10. |
The parameter which completely defines the chip formation in a metal cutting process is |
| A. | shear angle |
| B. | chip-tool contact length |
| C. | both (a) and (b) |
| D. | none of these |
| Answer» D. none of these | |
| 11. |
A fine 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» B. soft and ductile materials | |
| 12. |
In machining metals, surface roughness is due to |
| A. | feed marks or ridges left by the cutting tool |
| B. | fragment of built-up edge on the machined surface |
| C. | cutting tool vibrations |
| D. | all of these |
| Answer» E. | |
| 13. |
Tool signature consists of __________ elements. |
| A. | two |
| B. | four |
| C. | five |
| D. | seven |
| Answer» E. | |
| 14. |
A diamond locating pin is used in jigs and fixtures because |
| A. | diamond is very hard and wear resistant |
| B. | it occupies very little space |
| C. | it helps in assembly with tolerance on centre distance |
| D. | it has a long life |
| Answer» D. it has a long life | |
| 15. |
The negative rake is usually provided on |
| A. | high carbon steel tools |
| B. | high speed steel tools |
| C. | cemented carbide tools |
| D. | all of these |
| Answer» D. all of these | |
| 16. |
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 | |
| 17. |
EDM machining is applied for |
| A. | shaping carbide dies and punches having complicated profiles |
| B. | making large number of small holes in sieves and fuel nozzles |
| C. | embossing and engraving on harder materials |
| D. | all of these |
| Answer» E. | |
| 18. |
In metal machining, the zone where the heat is generated due to friction between the moving chip and the tool face, is called |
| A. | friction zone |
| B. | work-tool contact zone |
| C. | shear zone |
| D. | none of these |
| Answer» B. work-tool contact zone | |
| 19. |
The drill spindles are provided with standard taper known as |
| A. | Morse taper |
| B. | Seller's taper |
| C. | Chapman taper |
| D. | Brown and Sharpe taper |
| Answer» B. Seller's taper | |
| 20. |
The ductile materials, during machining, produce |
| A. | continuous chips |
| B. | discontinuous chips |
| C. | continuous chips with built up edge |
| D. | either (a) or (c) |
| Answer» E. | |
| 21. |
In metal cutting operations, the shear angle is the angle made by the shear plane with the |
| A. | direction of the tool axis |
| B. | direction of tool travel |
| C. | perpendicular to the direction of the tool axis |
| D. | central plane of the workpiece |
| Answer» C. perpendicular to the direction of the tool axis | |
| 22. |
The floating position of the holding fixture in a rotary transfer device is used to |
| A. | improve the accuracy of location |
| B. | reduce the tendency to over-index |
| C. | improve upon the acceleration and deceleration characteristics |
| D. | reduce the cycle time |
| Answer» E. | |
| 23. |
Slow speed of the spindle is necessary in |
| A. | thread cutting |
| B. | turning a work of larger diameter |
| C. | turning a hard or tough material |
| D. | all of these |
| Answer» E. | |
| 24. |
In electro-discharge machining, dielectric is used to |
| A. | help in the movement of the sparks |
| B. | control the spark discharges |
| C. | act as coolant |
| D. | all of these |
| Answer» E. | |
| 25. |
The hole drilled for tapping should be smaller than the tap size by twice the depth of thread. |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 26. |
Relief angles on high speed steel tools usually vary from |
| A. | 0 to 3 |
| B. | 3 to 10 |
| C. | 10 to 20 |
| D. | 20 to 30 |
| Answer» C. 10 to 20 | |
| 27. |
The cutting angle of a flat drill varies from |
| A. | 3 to 8 |
| B. | 20 to 30 |
| C. | 60 to 90 |
| D. | 90 to 120 |
| Answer» E. | |
| 28. |
Which of the following operation is first performed? |
| A. | Spot facing |
| B. | Boring |
| C. | Tapping |
| D. | Drilling |
| Answer» E. | |
| 29. |
The tool life is affected by |
| A. | depth of cut |
| B. | cutting speed |
| C. | feed |
| D. | all of these |
| Answer» E. | |
| 30. |
The size of a lathe is specified by the |
| A. | length between centres |
| B. | swing diameter over the bed |
| C. | swing diameter over the carriage |
| D. | all of these |
| Answer» E. | |
| 31. |
For machining a mild steel workpiece by a high speed steel tool, the average cutting speed is |
| A. | 5 m/min |
| B. | 10 m/min |
| C. | 15 m/min |
| D. | 30 m/min |
| Answer» E. | |
| 32. |
Discontinuous chips are formed during machining of |
| A. | brittle metals |
| B. | ductile metals |
| C. | hard metals |
| D. | soft metals |
| Answer» B. ductile metals | |
| 33. |
A drill mainly used in drilling brass, copper or softer materials, is |
| A. | flat drill |
| B. | straight fluted drill |
| C. | parallel shank twist drill |
| D. | tapered shank twist drill |
| Answer» C. parallel shank twist drill | |
| 34. |
In a planer |
| A. | tool is stationary and work reciprocates |
| B. | work is stationary and tool reciprocates |
| C. | tool moves over stationary work |
| D. | tool moves over reciprocating work |
| Answer» B. work is stationary and tool reciprocates | |
| 35. |
The operation of reproduction of an outline of a template on a workpiece is called face milling. |
| A. | Yes |
| B. | No |
| Answer» C. | |
| 36. |
The usual value of the point angle of a drill is |
| A. | 70 |
| B. | 100 |
| C. | 118 |
| D. | 130 |
| Answer» D. 130 | |
| 37. |
Buffing wheels are made of |
| A. | softer metals |
| B. | cotton fabric |
| C. | carbon |
| D. | graphite |
| Answer» C. carbon | |
| 38. |
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 | |
| 39. |
Which of the following statement is correct about nose radius? |
| A. | It improves tool life |
| B. | It improves the surface finish |
| C. | both (a) and (b) |
| D. | none of these |
| Answer» D. none of these | |
| 40. |
The cutting speed for drilling __________ with high speed steel drills is 24 to 45 m/min. |
| A. | mild steel |
| B. | copper |
| C. | aluminium |
| D. | brass |
| Answer» B. copper | |
| 41. |
In a centre lathe, the cutting tool is fed in __________ with reference to the lathe axis. |
| A. | cross direction only |
| B. | longitudinal direction only |
| C. | both cross and longitudinal direction |
| D. | any direction |
| Answer» D. any direction | |
| 42. |
The angle between the face of the tool and a line tangent to the machined surface at the cutting point is called cutting angle. |
| A. | Correct |
| B. | Incorrect |
| Answer» B. Incorrect | |
| 43. |
Broaching is applied for machining |
| A. | internal and external surfaces |
| B. | round or irregular shaped holes |
| C. | external flat and contoured surfaces |
| D. | all of these |
| Answer» E. | |
| 44. |
In twist fluted drills, chips do not move out automatically. |
| A. | Correct |
| B. | Incorrect |
| Answer» C. | |
| 45. |
The operation of producing grooves around the periphery of a cylindrical or conical workpiece is called |
| A. | profile milling |
| B. | gang milling |
| C. | saw milling |
| D. | helical milling |
| Answer» E. | |
| 46. |
A numerical method of identification of tool is known as tool signature. |
| A. | Correct |
| B. | Incorrect |
| Answer» B. Incorrect | |
| 47. |
Tumbler gears in lathe are used to |
| A. | reduce the spindle speed |
| B. | cut gears |
| C. | give desired direction of movement to the lathe carriage |
| D. | drill a workpiece |
| Answer» D. drill a workpiece | |
| 48. |
Mild steel during machining produces __________ chips. |
| A. | continuous |
| B. | discontinuous |
| Answer» B. discontinuous | |
| 49. |
Small nose radius |
| A. | increases tool life |
| B. | decreases tool life |
| C. | produces chipping and decreases tool life |
| D. | results in excessive stress concentration and greater heat generation |
| Answer» E. | |
| 50. |
The point angle of a drill, for drilling stainless steel, is |
| A. | 90 |
| B. | 118 |
| C. | 135 |
| D. | 150 |
| Answer» D. 150 | |