Q.1

A right hand tool on a lathe cuts most efficiently when it travels

  • from left to right end of the lathe bed
  • from right to left end of the lathe bed
  • with the help of a compound slide
  • across the bed
Q.2

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

  • Correct
  • Incorrect
Q.3

A left hand tool on a lathe cuts most efficiently when it travels

  • from left to right end of the lathe bed
  • from right to left end of the lathe bed
  • with the help of a compound slide
  • across the bed
Q.4

The tool made of cemented carbide wear out faster at

  • slow speeds
  • medium speeds
  • fast speeds
  • very fast speeds
Q.5

The machining of titanium is difficult due to

  • high thermal conductivity of titanium
  • chemical reaction between tool and work
  • low tool-chip contact area
  • none of these
Q.6

Cast iron during machining produces

  • continuous chips
  • discontinuous chips
  • continuous chips with built-up-edge
  • none of these
Q.7

The correct sequence of tool materials in increasing order of their ability to retain their hot hardness is

  • carbide, ceramic, cermet, borazon
  • ceramic, carbide, borazon, cermet
  • cermet, carbide, ceramic, borazon
  • borazon, ceramic, carbide, cermet
Q.8

A push broach as compared to pull broach

  • has less number of teeth
  • is short and stocky
  • removes less material for each pass of the tool
  • all of the above
Q.9

The lip angle of a single point tool is usually

  • 20° to 40°
  • 40° to 60°
  • 60° to 80°
  • none of these
Q.10

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.

  • Correct
  • Incorrect
Q.11

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

  • Correct
  • Incorrect
Q.12

A fixture does not guide the tool.

  • Correct
  • Incorrect
Q.13

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

  • rake angles
  • relief angles
Q.14

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

  • flat drill
  • straight fluted drill
  • parallel shank twist drill
  • tapered shank twist drill
Q.15

A single point thread cutting tool should ideally have

  • zero rake angle
  • positive rake angle
  • negative rake angle
  • point angle
Q.16

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

  • independent of index change gear ratio
  • dependent on speed change gear ratio
  • inter-related to index change gear ratio
  • independent of speed and index change gear ratio
Q.17

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

  • Yes
  • No
Q.18

The abrasive recommended for grinding materials of high tensile strength is

  • silicon carbide
  • aluminium oxide
  • sand stone
  • diamond
Q.19

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

  • The flank of the tool is the surface or surfaces below and adjacent to the cutting edges
  • The nose is the corner, arc or chamfer joining the side cutting and the end cutting edges
  • The heel is that part of the tool which is shaped to produce the cutting edges and face
  • The base is that surface of the shank which bears against the support and takes tangent pressure of the cut
Q.20

The average cutting speed for turning brass with a high speed steel tool is

  • 15 to 19 m/min
  • 25 to 31 m/min
  • 60 to 90 m/min
  • 90 to 120 m/min
Q.21

In hot machining, tool is made of

  • tungsten carbide
  • brass or copper
  • diamond
  • stainless steel
Q.22

Lapping is an operation of

  • making a cone-shaped enlargement of the end of a hole
  • smoothing and squaring the surface around a hole
  • sizing and finishing a small diameter hole
  • producing a hole by removing metal along the circumference of a hollow cutting tool
Q.23

Crater wear occurs mainly on the

  • nose part, front relief face and side relief face of the cutting tool
  • face of the cutting tool at a short distance from the cutting edge only
  • cutting edge only
  • front face only
Q.24

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

  • Agree
  • Disagree
Q.25

Glazing in grinding wheels can be decreased by

  • using a harder wheel or by increasing the wheel speed
  • using a softer wheel or by decreasing the wheel speed
  • using a harder wheel or by decreasing the wheel speed
  • using a softer wheel or by increasing the wheel speed
Q.26

The silicon carbide abrasive is chiefly used for grinding

  • cemented carbide
  • ceramic
  • cast iron
  • all of these
Q.27

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

  • It is best suited for machining hard and brittle materials.
  • It cuts materials at very slow speeds.
  • It removes large amount of material.
  • It produces good surface finish.
Q.28

The work or surface speed for cylindrical grinding varies from

  • 5 to 10 m/min
  • 10 to 20 m/min
  • 20 to 30 m/min
  • 40 to 60 m/min
Q.29

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

  • equal to
  • twice
  • thrice
  • one-half
Q.30

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

  • Grinding at high speed results in the reduction of chip thickness and cutting forces per grit.
  • Aluminium oxide wheels are employed.
  • The grinding wheel has to be of open structure.
  • all of the above
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