Q.1

In a plain milling machine, the table can be moved

  • longitudinally
  • crosswise
  • vertically
  • all of these
Q.2

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

  • Regulating wheel diameter
  • Speed of the regulating wheel
  • Angle between the axes of grinding and regulating wheels
  • all of the above
Q.3

The cutting speed of a drill varies from point to point on the cutting edge of the drill.

  • Correct
  • Incorrect
Q.4

A dense structure of a grinding wheel is denoted by the number 9 toor higher.

  • Yes
  • No
Q.5

A twist drill is specified by its

  • shank, material and diameter
  • shank, lip angle and size of flute
  • material, length of body and helix angle
  • any one of these
Q.6

Ultra-sonic machining is best suited for

  • tool steels
  • sintered carbides
  • glass
  • all of these
Q.7

A jig is defined as a device which

  • holds and locates a workpiece and guides and controls one or more cutting tools
  • holds and locates a workpiece during an inspection or for a manufacturing operation
  • is used to check the accuracy of workpiece
  • all of the above
Q.8

The stroke of a shaping machine ismm. It makesdouble strokes per minute. The overall average speed of operation is

  • 3.75 m/min
  • 5 m/min
  • 7.5 m/min
  • 15 m/min
Q.9

The saw milling is an operation of

  • producing grooves around the periphery of a cylindrical or conical workpiece
  • producing narrow slots or grooves on a workpiece
  • reproduction of an outline of a template on a workpiece
  • machining several surfaces of a workpiece simultaneously
Q.10

The ratio between two consecutive spindle speeds for a six-speed drilling machine using drills of diameter 6.tomm size and at a cutting velocity ofm/min is

  • 1.02
  • 1.32
  • 1.66
  • 1.82
Q.11

The size of a shaper is given by

  • stroke length
  • motor power
  • mass of machine
  • rate size
Q.12

The size of abrasive grain required in a grinding wheel depends upon the

  • amount of material to be removed
  • hardness of material being ground
  • finish desired
  • all of these
Q.13

The type of tool used on milling machine and broaching machine is

  • single point cutting tool
  • two point cutting tool
  • three point cutting tool
  • multi-point cutting tool
Q.14

In a single point tool, the angle between the surface of the flank immediately below the point and a line drawn from the point perpendicular to the base, is known as

  • side relief angle
  • end relief angle
  • back rake angle
  • side rake angle
Q.15

A grinding wheel becomes glazed (i.e. cutting edge takes a glass-like appearance) due to

  • wear of bond
  • breaking of abrasive grains
  • wear of abrasive grains
  • cracks on grinding wheel
Q.16

Internal gears can be made by

  • hobbing
  • shaping with pinion cutter
  • shaping with rack cutter
  • milling
Q.17

The abrasive slurry used in ultra-sonic machining contains fine particles of

  • aluminium oxide
  • boron carbide
  • silicon carbide
  • any one of these
Q.18

The material which on machining produces chips with built up edge is

  • brittle material
  • tough material
  • hard material
  • ductile material
Q.19

In drilling operation, the metal is removed by

  • shearing
  • extrusion
  • shearing and extrusion
  • shearing and compression
Q.20

A single point tool has

  • rake angle
  • cutting angle
  • lip angle
  • all of these
Q.21

The lathe spindles are usually made hollow and provided with

  • internal taper
  • external taper
  • internal and external taper
  • no taper
Q.22

In oblique cutting system, the maximum chip thickness

  • occurs at the middle
  • may not occur at the middle
  • depends upon the material of the tool
  • depends upon the geometry of the tool
Q.23

High speed steel tools retain their hardness upto a temperature of

  • 250°C
  • 350°C
  • 500°C
  • 900°C
Q.24

The hole to be drilled for tapping is __________ the outside diameter of the thread on the tap.

  • equal to
  • smaller than
  • greater than
Q.25

In plunge 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.26

Dielectric is used in

  • electro-chemical machining
  • ultra-sonic machining
  • electro-discharge machining
  • laser machining
Q.27

A mandrel is used to hold

  • an eccentric work
  • a heavy work
  • a thin work
  • none of these
Q.28

The actual feed in centreless grinders is given by (where d = Dia. of regulating wheel, n = Revolutions per minute, and α = Angle of inclination of wheel)

  • πd
  • πd n
  • πd n sin α
  • πd n cos α
Q.29

The high cutting speed and large rake angle of the tool will result in the formation of

  • continuous chips
  • discontinuous chip
  • continuous chips with built up edge
  • none of these
Q.30

The cutting speed of a drill depends upon the

  • material of drill
  • type of material to be drilled
  • quality of surface finish desired
  • all of these
0 h : 0 m : 1 s