Q.1

The ductile materials, during machining, produce

  • continuous chips
  • discontinuous chips
  • continuous chips with built up edge
  • either (a) or (c)
Q.2

When the metal is removed by erosion caused by rapidly recurring spark discharges between the tool and work, the process is known as

  • electro-chemical machining
  • electro-discharge machining
  • ultra-sonic machining
  • none of these
Q.3

For machining a mild steel workpiece by a high speed steel tool, the average cutting speed is

  • 5 m/min
  • 10 m/min
  • 15 m/min
  • 30 m/min
Q.4

Tool signature consists of __________ elements.

  • two
  • four
  • five
  • seven
Q.5

In a plain milling cutter, the chip space between the back of one tooth and the face of the next tooth is called

  • face
  • fillet
  • gash
  • land
Q.6

A drill mainly used in drilling brass, copper or softer materials, is

  • flat drill
  • straight fluted drill
  • parallel shank twist drill
  • tapered shank twist drill
Q.7

The lathe centres are provided with standard taper known as

  • Morse taper
  • Seller's taper
  • Chapman taper
  • Brown and Sharpe taper
Q.8

The lathe spindles at the nose end have

  • internal screw threads
  • external screw threads
  • no threads
  • tapered threads
Q.9

The grinding wheel speed (surface speed in m/min) usually varies from

  • 500 to 1000
  • 1000 to 1500
  • 1500 to 2000
  • 2000 to 2500
Q.10

In metal cutting operations, the shear angle is the angle made by the shear plane with the

  • direction of the tool axis
  • direction of tool travel
  • perpendicular to the direction of the tool axis
  • central plane of the workpiece
Q.11

In machining metal, cutting force at the cutting edge is measured by a

  • wattmeter
  • dynamometer
  • hydrometer
  • pyrometer
Q.12

Which of the following statement is wrong?

  • The larger side rake angle produces chipping.
  • The smaller rake angle produces excessive wear and deformation in tool.
  • The side cutting edge angle (less than 15°) increases tool life.
  • The increase in nose radius decreases tool life.
Q.13

Slow speed of the spindle is necessary in

  • thread cutting
  • turning a work of larger diameter
  • turning a hard or tough material
  • all of these
Q.14

Cemented carbide tools are generally poor in shear.

  • Yes
  • No
Q.15

As the cutting speed increases, the tool cutting forces

  • remain constant
  • increases
  • decreases
  • first increases and then decreases
Q.16

The grinding of long, slender shafts or bars is usually done by

  • infeed grinding
  • through feed grinding
  • endfeed grinding
  • any one of these
Q.17

The negative rake is usually provided on

  • high carbon steel tools
  • high speed steel tools
  • cemented carbide tools
  • all of these
Q.18

Crater wear is mainly due to the phenomenon known as

  • adhesion of metals
  • oxidation of metals
  • diffusion of metals
  • all of these
Q.19

In which of the following machine, the work rotates and the tool is stationary?

  • Vertical boring machine
  • Horizontal boring machine
  • Precision boring machine
  • Jig boring machine
Q.20

In a planer

  • tool is stationary and work reciprocates
  • work is stationary and tool reciprocates
  • tool moves over stationary work
  • tool moves over reciprocating work
Q.21

In a plain milling cutter, the portion of the gash adjacent to the cutting edge on which the chip impinges is called

  • face
  • fillet
  • land
  • lead
Q.22

The lip clearance angle is the angle formed by the

  • leading edge of the land with a plane having the axis of the drill
  • flank and a plane at right angles to the drill axis
  • chisel edge and the lip as viewed from the end of a drill
  • none of the above
Q.23

The factor considered for evaluation of machinability is

  • cutting forces and power consumption
  • tool life
  • type of chips and shear angle
  • all of these
Q.24

The floating position of the holding fixture in a rotary transfer device is used to

  • improve the accuracy of location
  • reduce the tendency to over-index
  • improve upon the acceleration and deceleration characteristics
  • reduce the cycle time
Q.25

With the same tool life, the maximum material per minute is removed by

  • increasing the cutting speed
  • decreasing the cutting speed
  • increasing the depth of cut
  • increasing the feed rate
Q.26

It is desired to perform the operations like drilling, reaming, counter-boring etc. on a work piece. Which of the following machine will be used?

  • Sensitive drilling machine
  • Radial drilling machine
  • Gang drilling machine
  • Multiple spindle drilling machine
Q.27

The hole drilled for tapping should be smaller than the tap size by twice the depth of thread.

  • Agree
  • Disagree
Q.28

Which of the following statement is wrong as regard to down milling?

  • It can not be used on old machines due to backlash between the feed screw of the table and the nut.
  • The chips are disposed off easily and do not interfere with the cutting.
  • The surface milled appears to be slightly wavy.
  • The coolant can be poured directly at the cutting zone where the cutting force is maximum.
Q.29

Crater wear leads to

  • increase in cutting temperature
  • weakening of tool
  • friction and cutting forces
  • all of these
Q.30

In centreless grinding, work place centre will be

  • above the line joining the two wheel centres
  • below the line joining the two wheel centres
  • on the line joining the two wheel centres
  • at the intersection of the line joining the wheel centres with the work place plane
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