1. Segmental chips are formed during machiningA.

mild steel

B.cast ironC.high speed steelD.

high carbon steel

2. Cemented carbide tool tips are produced by powder metallurgy.A.

TrueB.

False

3. If the diameter of the hole is subject to considerable variation, then for locating in jigs and fixtures, the pressure type of locator used isA.

conical locator

B.cylindrical locatorC.diamond pin locatorD.

vee locator

4. Side rake angle of a single point cutting tool is the angleA.by which the face of the tool is inclined towards backB.by which the face of the tool is inclined sideways

C.between the surface of the flank immediately below the point and a plane at right angles to the centre line of the point of the tool

D.between the surface of the flank immediately below the point and a line drawn from the point perpendicular to the base

5. Internal gears can be made byA.hobbingB.shaping with pinion cutterC.shaping with rack cutterD.milling

6. In order to prevent tool from rubbing the work __________ on tools are provided.A.

rake angles

B.relief angles

1

Technical Test- Mechanical EngineeringDuration: 90 Minutes Marks: 100

Note: There are no Negative Marking and Each question carry equal marks.

7. The silicon carbide abrasive is chiefly used for grindingA.

cemented carbide

B.ceramicC.cast ironD.

all of these

8. Drilling is an example ofA.

orthogonal cutting

B.oblique cuttingC.simple cuttingD.

uniform cutting

9. A round nose tool may be fed eitner from left to right end or from right to left end of the lathe bed.A.

YesB.

No

10. When the cutting edge of the tool is dull, then during machiningA.continuous chips are formedB.discontinuous chips are formedC.continuous chips with built-up edge are formedD.no chips are formed

11. A fine grained grinding wheel is used to grind hard materials.

A.

CorrectB.

Incorrect

12. Cast iron during machining producesA.

continuous chips

B.discontinuous chipsC.continuous chips with built-up-edgeD.

none of these

13. A single point thread cutting tool should ideally haveA.

zero rake angle

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B.positive rake angleC.negative rake angleD.

point angle

14. The work or surface speed for cylindrical grinding varies fromA.

5 to 10 m/min

B.10 to 20 m/minC.20 to 30 m/minD.

40 to 60 m/min

15. The cutting tool in a milling machine is mounted onA.

spindle B.arbor

C.column D.knee

16. The tool made of cemented carbide wear out faster atA.

slow speeds

B.medium speedsC.fast speedsD.

very fast speeds

17. A push broach as compared to pull broachA.

has less number of teeth

B.is short and stockyC.removes less material for each pass of the toolD.

all of the above

18. Twist drills are made ofA.high speed steelB.carbon steelC.stainless steelD.either (a) or (b)

19. A twist drill is aA side cutting tool

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.B.front cutting toolC.end cutting toolD.

none of these

20. The rake angle required to machine brass by high speed steel tool is

A.0° B.10°

C.20° D.-10

21. The lip angle of a single point tool is usuallyA.

20° to 40°

B.40° to 60°C.60° to 80°D.

none of these

22. The average cutting speed for turning brass with a high speed steel tool isA.15 to 19 m/minB.25 to 31 m/minC.60 to 90 m/min

23. The maximum production of small and slender parts is done byA.

watch maker's lathe

B.sliding head stock automatic latheC.multispindle automatic latheD.

capastan lathe

24. Side rake angle on tools is provided to control chip flow.A.

True B.False

25. The method of grinding used to produce a straight or tapered surface on a workpiece, isA.

internal cylindrical grinding

B.form grindingC.external cylindrical grindingD.

surface grinding

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Answer & Explanation

26. A fixture does not guide the tool.A.

Correct B.Incorrect

27. Crater wear occurs mainly on theA.

nose part, front relief face and side relief face of the cutting tool

B.face of the cutting tool at a short distance from the cutting edge onlyC.cutting edge onlyD.

front face only

28. Gear lapping is an operation

A.after heat treatment

B.prior to heat treatment

C.for gear reconditioning

D.none of these

29. The facing is an operation ofA.

bevelling the extreme end of a workpiece

B.embossing a diamond shaped pattern on the surface of a workpieceC.reducing the diameter of a workpiece over a very narrow surfaceD.

machining the ends of a workpiece to produce a flat surface square with the axis

30.  A fixture is defined as a device whichA. 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 workpieceD.all of the above

31. A drill considered as a cutting tool having zero rake, is known as aA.

flat drill

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B.straight fluted drillC.parallel shank twist drillD.

tapered shank twist drill

32. Which of the following statement is wrong about ultra-sonic machining?A.

It is best suited for machining hard and brittle materials.

B.It cuts materials at very slow speeds.C.It removes large amount of material.D.

It produces good surface finish.

33. In oblique cutting system, the maximum chip thickness occurs at the middle.A.

Correct B.Incorrect

34. Larger end cutting edge angle __________ tool life.A.

increases

B.decreasesC.does not effect

35. The lead screw of a lathe has __________ threads.A.

single start

B.double startC.multi-startD.

any one of these

36. A left hand tool on a lathe cuts most efficiently when it travelsA.

from left to right end of the lathe bed

B.from right to left end of the lathe bedC.with the help of a compound slideD.

across the bed

37. The correct sequence of tool materials in increasing order of their ability to retain their hot hardness isA.

carbide, ceramic, cermet, borazon

B.ceramic, carbide, borazon, cermet

6

C.cermet, carbide, ceramic, borazonD.

borazon, ceramic, carbide, cermet

38. Which of the following statement is incorrect with reference of lathe cutting tools?A.

The flank of the tool is the surface or surfaces below and adjacent to the cutting edges

B.The nose is the corner, arc or chamfer joining the side cutting and the end cutting edges

C.The heel is that part of the tool which is shaped to produce the cutting edges and face

D.

The base is that surface of the shank which bears against the support and takes tangent pressure of the cut

39. In the relation VTn = C, the value of n for carbide tools isA.

0.1 to 0.2

B.0.20 to 0.25C.0.25 to 0.40D.

0.40 to 0.55

40. In up milling, the thickness of chip isA.

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 cutC.uniform throughout the cutD.

none of these

41. The machining of titanium is difficult due toA.

high thermal conductivity of titanium

B.chemical reaction between tool and workC.low tool-chip contact areaD.

none of these

42. In orthogonal cutting system, the maximum chip thickness occurs at the middle.A.

Correct B.Incorrect

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43. Lapping is an operation ofA.

making a cone-shaped enlargement of the end of a hole

B.smoothing and squaring the surface around a holeC.sizing and finishing a small diameter holeD.

producing a hole by removing metal along the circumference of a hollow cutting tool

44. The different spindle speeds on a lathe formA.

arithmetical progression

B.geometrical progressionC.harmonical progressionD.

any one of these

45. If the helix angle of the drill is made __________ 30°, then the torque required to drive the drill at a given feed will be more.A.

equal to

B.less thanC.more than

46. The angle included between the two lips projected upon a plane parallel to the drill axis and paralled to the two cutting lips, is called helix angle.A.

Correct B.Incorrect

47. In hot machining, tool is made ofA.

tungsten carbide

B.brass or copperC.diamondD.

stainless steel

48. In ultra-sonic machining, the metal is removed byA.

using abrasive slurry between the tool and work

B.direct contact of tool with the workC.maintaining an electrolyte between the work and tool in a very small gap

between the two

8

D.

erosion caused by rapidly recurring spark discharges between the tool and work

49. The velocity of tool relative to the workpiece is known as cutting velocity.A.

True B.False

50.  Grinding wheels should be tested for balanceA.only at the time of manufactureB.before starting the grinding operationC.at the end of grinding operationD.occasionally

51.. The example of snag grinding isA.trimming the surface left by sprues and risers on castingsB.grinding the parting line left on castingsC.removing flash on forgingsD.all of these

52. The angle between the shear plane and __________ is called shear angle.A.

work surface

B.tool face

53. In machining soft materials, a tool with negative relief angle is used.A.

Correct B.Incorrect

54. Which of the following parameters influence the axial feed rate in centreless grinding?A.

Regulating wheel diameter

B.Speed of the regulating wheelC.Angle between the axes of grinding and regulating wheelsD.

all of the above

55. The lathe spindles are usually made hollow and provided withA.

internal taper

B.external taperC.internal and external taperD.

no taper

9

56. The top and sides of the table of a shaper usually haveA.

L-type slots

B.T-type slotsC.I-type slotsD.

any one of these

57. The binding material used in cemented carbide tools isA.

tungsten B.chromium

C.silicon D.cobalt

58. In machining metals, chips break due to __________ of work material.A.

toughness

B.ductilityC.elasticityD.

work hardening

59. For softer materials, the point angle of the drill is keptA.

equal to 118°

B.less than 118°C.more than 118°D.

any one of these

60. When the backgear is engaged in a backgeared headstock, the spindle speed reduces considerably.A.

AgreeB.Disagree

61. In continuous chip cutting, the maximum heat is taken by the cutting tool.A.

Yes B.No

62. Which of the following statement is correct regarding grinding of high carbon steel?A.

Grinding at high speed results in the reduction of chip thickness and cutting forces per grit.

B.Aluminium oxide wheels are employed.

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C.The grinding wheel has to be of open structure.D.

all of the above

63. The rear teeth of a broachA.

perform burnishing operation

B.remove minimum metalC.remove maximum metalD.

remove no metal

64. High speed steel drills can be operated at about __________ the speed of high carbon steel drills.A.

one-half

B.one-fourthC.doubleD.

four times

65. When the end of a tap is tapered for about three or four threads, it is known as aA.

taper tap

B.bottoming tapC.second tapD.

none of these

66. Crater wear is predominant inA.

carbon tool steels

B.tungsten carbide toolsC.high speed steel toolsD.

ceramic tools

67. The method of centreless grinding used to produce taper isA.

infeed grinding

B.through feed grindingC.endfeed grindingD any one of these

11

.

68. In a shaper, the length of stroke is increased byA.

increasing the centre distance of bull gear and crank pin

B.decreasing the centre distance of bull gear and crank pinC.increasing the length of the armD.

decreasing the length of the slot in the slotted lever

69. Carbon tool steels have low-heat and wear-resistance.A.

Correct B.Incorrect

70. Trepanning is an operation ofA.

making a cone-shaped enlargement of the end of a hole

B.smoothing and squaring the surface around a holeC.sizing and finishing a small diameter holeD.

producing a hole by removing metal along the circumference of a hollow cutting tool

71. The abrasive recommended for grinding materials of high tensile strength isA.

silicon carbide

B.aluminium oxideC.sand stoneD.

diamond

72. The factor responsible for the formation of continuous chips with built up edge isA.

low cutting speed and large rake angle

B.low cutting speed and small rake angleC.high cutting speed and large rake angleD.

high cutting speed and small rake angle

73. An important geometrical quantity in the cutting of metals which can be used as a criterion for machinability of metals is

12

A.

cutting speed

B.feed rateC.shear angleD.

tool geometry

74. In centreless grinding, the surface speed of regulating wheel isA.

5 to 15 m/min

B.15 to 60 m/minC.60 to 90 m/minD.

90 to 120 m/min

75. In metal cutting, use of low feeds and high cutting speeds is desired when the objective isA.

high metal removal rate

B.dry machiningC.use of soft cutting toolD.

surface finish

76. The angle on which the strength of the tool depends isA.

rake angle

B.cutting angleC.clearance angleD.

lip angle

77. Larger than 15° side cutting edge angleA.

increases tool life

B.decreases tool lifeC.produces chipping and decreases tool lifeD.

results in excessive stress concentration and greater heat generation

78. Which of the following statement is correct for orthogonal cutting system?A.

The cutting edge of the tool is perpendicular to the direction of tool travel.

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B.The cutting edge clears the width of the workpiece on either ends.

C.The chip flows over the tool face and the direction of the chip flow velocity is normal to the cutting edge.

D.

all of the above

79. The angle made by the face of the tool and the plane parallel to the base of cutting tool is calledA.

rake angle

B.cutting angleC.clearance angleD.

lip angle

80. In case of turning, as the machining proceeds, the spindle speed must __________ with the decrease in diameter of work.

A.

decreaseB.Increase

81. Back rake angle of a single point tool is the angle by which the face of the tool is inclined towards back.A.

Agree B.Disagree

82. As the cutting speed increases, tool life decreases.A.

Yes B.No

83. In metal machining, the work-tool contact zone is a zone where heat is generated due toA.

plastic deformation of metal

B.burnishing frictionC.friction between the moving chip and the tool faceD.

none of the above

84. Thread grinding requires work speed fromA.

1 to 3 m/min

B.5 to 10 m/minC.10 to 14 m/min

14

D.

14 to 20 m/min

85. Threading is an operation ofA.

smoothing and squaring the surface around a hole

B.sizing and finishing a small diameter holeC.producing a hole by removing metal along the circumference of a hollow

cutting toolD.

cutting helical grooves on the external cylindrical surface

86. Glazing in grinding wheels can be decreased byA.

using a harder wheel or by increasing the wheel speed

B.using a softer wheel or by decreasing the wheel speedC.using a harder wheel or by decreasing the wheel speedD.

using a softer wheel or by increasing the wheel speed

87. The cutting speed is minimum while machining __________ with a high speed steel tool.A.

cast iron

B.mild steelC.brassD.

aluminium

88. A process of removing metal by pushing or pulling a cutting tool is calledA.

up milling

B.down millingC.formingD.

broaching

89. The hardness of a grinding wheel is specified byA.

Brinell hardness number

B.Rockwel! hardness number

15

C.Vickers pyramid numberD.

letter of alphabet

90. Which of the following operations can be performed with milling cutters?A.

cutting key ways on shafts

B.cutting external screw threadsC.cutting teeth of spur gearsD.

all of these

91. While cutting helical gears on a non-differential gear hobber, the feed change gear ratio isA.

independent of index change gear ratio

B.dependent on speed change gear ratioC.inter-related to index change gear ratioD.

independent of speed and index change gear ratio

92. The swing diameter over the bed is __________ the height of the centre measured from the bed of the lathe.A.

equal to

B.twiceC.thriceD.

one-half

93. In grinding irregular, curved, tapered, convex and concave surfaces, the grinder used isA.

cylindrical grinder

B.internal grinderC.surface grinderD.

tool and cutter grinder

94. Down milling is also called

16

A.

conventional milling

B.climb millingC.end millingD.

face milling

95. Any number of equal divisions can be obtained on milling machine byA.

direct indexing

B.simple indexingC.compound indexingD.

differential indexing

96. The depth of cut in drilling is __________ the drill diameter.A.

equal to

B.one-fourthC.one-halfD.

double

97. The type of tool used on lathe, shaper and planer isA.

single point cutting tool

B.two point cutting toolC.three point cutting toolD.

multi-point cutting tool

98. A __________ grinding wheel is used to grind soft materials.A.

coarse grained

B.medium grainedC.finegrained

99. The relation between tool life (T) and cutting speed (V) is VTn = Constant. In this relation, the value of n depends uponA.

work material

B.tool materialC.working conditionsD type of chip produced

17

.

100. In order to grind soft materialA.

coarse grained grinding wheel is used

B.fine grained grinding wheel is usedC.medium grained grinding wheel is usedD.

any one of these

18