Q.1

In transverse grinding

  • the work is reciprocated as the wheel feeds to produce cylinders longer than the width of wheel face
  • the work rotates in a fixed position as the wheel feeds to produce cylinders equal to or shorter than the width of wheel face
  • the work is reciprocated as the wheel feeds to produce cylinders shorter than the width of wheel face
  • the work rotates in a fixed position as the wheel feeds to produce cylinders longer than the width of wheel face
Q.2

Buffing wheels are made of

  • softer metals
  • cotton fabric
  • carbon
  • graphite
Q.3

The infeed grinding is used to

  • produce tapers
  • grind shoulders and formed surfaces
  • grind long, slender shafts or bars
  • ail of these
Q.4

The vector sum of cutting velocity and chip velocity is __________ shear velocity.

  • equal to
  • less than
  • more than
Q.5

For turning internal tapers, the suitable method is

  • by a form tool
  • by setting over the tail stock
  • by a taper turning attachment
  • by swivelling the compound rest
Q.6

The angle between the lathe centres is

  • 30°
  • 45°
  • 60°
  • 90°
Q.7

The rate of removing metal is __________ by increasing the depth of cut.

  • decreased
  • increased
Q.8

A drill bit ofmm diameter rotating atr.p.m. with a feed rate of 0.2 mm/revolution is used to drill a through-hole in a mild steel platemm thickness. The depth of cut in this drilling operation is

  • 0.2 mm
  • 10 mm
  • 20 mm
  • 100 mm
Q.9

In drilling mild steel and brass, the point angle of a drill is 118°.

  • True
  • False
Q.10

In machining cast iron, no cutting fluid is required.

  • Correct
  • Incorrect
Q.11

A grinding wheel is said to be of __________ if the abrasive grains can be easily dislodged.

  • soft grade
  • medium grade
  • hard grade
Q.12

In drilling softer materials, the cutting speed is __________ as compared to harder materials.

  • same
  • low
  • high
Q.13

The effect of setting a boring tool above centre height leads to

  • increase in the effective rake angle and a decrease in the effective clearance angle
  • increase in both effective rake angle and effective clearance angle
  • decrease in the effective rake angle and an increase in the effective clearance angle
  • decrease in both effective rake angle and effective clearance angle
Q.14

Which of the following statement is correct about EDM machining?

  • It can machine hardest materials.
  • It produces high degree of surface finish.
  • The tool and work are never in contact with each other.
  • all of these
Q.15

The form grinding is used to grind gear teeth, threads, splined shafts and holes.

  • Correct
  • Incorrect
Q.16

In __________ operation, the chip thickness is minimum at the beginning of the cut and it reaches to the maximum when the cut terminates.

  • conventional milling
  • climb milling
  • face milling
  • end milling
Q.17

In __________ operation, the cutting force is maximum when the tooth begins its cut and reduces it to minimum when the tooth leaves the work.

  • up milling
  • down milling
  • face milling
  • end milling
Q.18

In a milling operation, two side milling cutters are mounted with a desired distance between them so that both sides of a workpiece can be milled simultaneously. This set up is called

  • gang milling
  • straddle milling
  • string milling
  • side milling
Q.19

For harder alloy steel, the point angle of the drill is kept

  • equal to 118°
  • less than 118°
  • more than 118°
  • any one of these
Q.20

The dressing and truing of grinding wheel are done with the same tools but not for the same purpose.

  • Agree
  • Disagree
Q.21

In gear hobbing

  • only hob rotates
  • only gear blank rotates
  • both hob and gear blank rotates
  • neither hob nor gear blank rotates
Q.22

Hard and tough materials like cast iron should be turned at

  • slow speed
  • high speed
  • any speed
  • certain specific speed
Q.23

Lathe bed is made of

  • mild steel
  • alloy steel
  • pig iron
  • chilled cast iron
Q.24

When the shear angle is large

  • 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.25

The method of grinding used to produce internal cylindrical holes and tapers, is

  • internal cylindrical grinding
  • form grinding
  • external cylindrical grinding
  • surface grinding
Q.26

The tail stock and the carriage of a lathe may be guided on same or different guideway.

  • True
  • False
Q.27

The tail stock set over method of taper turning is preferred for

  • internal tapers
  • small tapers
  • long slender tapers
  • steep tapers
Q.28

In machining metals, surface roughness is due to

  • feed marks or ridges left by the cutting tool
  • fragment of built-up edge on the machined surface
  • cutting tool vibrations
  • all of these
Q.29

Which of the following statement is correct about nose radius?

  • It improves tool life
  • It improves the surface finish
  • both (a) and (b)
  • none of these
Q.30

Spot facing is an operation of smoothing and squaring the surface around a hole.

  • True
  • False
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