Q.1

Which of the following parameters govern the value of shear angle in continuous chip formation?

  • True feed
  • Chip thickness
  • Rake angle of the cutting tool
  • all of these
Q.2

The taper on the lathe spindle is

  • 1 in 10
  • 1 in 15
  • 1 in 20
  • 1 in 30
Q.3

An open structure of a grinding wheel is denoted by the number 1 to 8.

  • Correct
  • Incorrect
Q.4

The point angle of a drill, for drilling stainless steel, is

  • 90°
  • 118°
  • 135°
  • 150°
Q.5

Holes are machined by push broaches only for sizing.

  • Correct
  • Incorrect
Q.6

In oblique cutting system, the cutting edge of the tool

  • may clear the width of the workpiece
  • may or may not clear the width of the workpiece
  • may not clear the width of the workpiece
  • should always clear the width of the workpiece
Q.7

In metal machining, the zone where the maximum heat is generated due to the plastic deformation of metal, is called

  • friction zone
  • work-tool contact zone
  • shear zone
  • none of these
Q.8

Jigs are heavier than fixtures in construction.

  • Yes
  • No
Q.9

The correct sequence of the following parameters in order of their maximum to minimum influence on tool life is

  • feed rate, depth of cut, cutting speed
  • depth of cut, cutting speed, feed rate
  • cutting speed, feed rate, depth of cut
  • feed rate, cutting speed, depth of cut
Q.10

The angle between the face and flank of the single point cutting tool is known as

  • rake angle
  • clearance angle
  • lip angle
  • point angle
Q.11

The tool life is __________ cutting speed.

  • independent of
  • dependant upon
Q.12

In order to achieve a specific surface finish in single point turning, the most important factor to be controlled is

  • depth of cut
  • cutting speed
  • feed
  • tool rake angle
Q.13

The chuck preferred for quick setting and accurate centering of a job is

  • four jaw independent chuck
  • collect chuck
  • three jaw universal chuck
  • magnetic chuck
Q.14

A diamond locating pin is used in jigs and fixtures because

  • diamond is very hard and wear resistant
  • it occupies very little space
  • it helps in assembly with tolerance on centre distance
  • it has a long life
Q.15

The cutting speed for drilling __________ with high speed steel drills istom/min.

  • mild steel
  • copper
  • aluminium
  • brass
Q.16

A better machinable metal is one which gives

  • lower chip-tool contact area and larger shear angle
  • higher chip-tool contact area and smaller shear angle
  • lower chip-tool contact area and smaller shear angle
  • higher chip-tool contact area and larger shear angle
Q.17

The relief or clearance at the cutting edge of a flat drill varies from

  • 3° to 8°
  • 20° to 30°
  • 60° to 90°
  • 90° to 120°
Q.18

Crack in grinding wheel is developed due to

  • high temperature developed at the contact of the wheel face and work
  • grinding hard work
  • low speed of wheel
  • high speed of wheel
Q.19

In an orthogonal cutting, the depth of cut is halved and the feed rate is double. If the chip thickness ratio is unaffected with the changed cutting conditions, the actual chip thickness will be

  • doubled
  • halved
  • quadrupled
  • unchanged
Q.20

A numerical method of identification of tool is known as tool signature.

  • Correct
  • Incorrect
Q.21

The increase in depth of cut and feed rate __________ surface finish.

  • improves
  • deteriorates
  • does not effect
Q.22

When the shear angle is small

  • path of shear is short and chip is thin
  • path of shear is large and chip is thick
  • path of shear is short and chip is thick
  • path of shear is large and chip is thin
Q.23

The operation of making a cone-shaped enlargement of the end of a hole is known as

  • counter-sinking
  • counter-boring
  • trepanning
  • spot facing
Q.24

In electro-chemical machining, the gap between the tool and work is kept as

  • 0.1 mm
  • 0.25 mm
  • 0.4 mm
  • 0.75 mm
Q.25

In drilling aluminium, a drill with

  • zero helix angle is used
  • low helix angle is used
  • high helix angle is used
  • any helix angle can be used
Q.26

In order to obtain a surface finish in the range of 0.μm to 1.μm , the operation used is called.

  • grinding
  • lapping
  • honing
  • buffing
Q.27

Surface grinding is done to produce

  • tapered surface
  • flat surface
  • internal cylindrical holes
  • all of these
Q.28

Negative rakes are used for

  • carbide tools
  • heavy loads
  • harder materials
  • all of these
Q.29

In metal machining, the zone where the heat is generated due to friction between the moving chip and the tool face, is called

  • friction zone
  • work-tool contact zone
  • shear zone
  • none of these
Q.30

In a centre lathe, the cutting tool is fed in __________ with reference to the lathe axis.

  • cross direction only
  • longitudinal direction only
  • both cross and longitudinal direction
  • any direction
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