31. 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
✅ The correct answer is option C.
Production Engineering MCQs
32. The size of a shaper is given by
stroke length
motor power
mass of machine
rate size
✅ The correct answer is option A.
33. 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 w
✅ The correct answer is option B.
34. The method of centreless grinding used to produce taper is
infeed grinding
through feed grinding
endfeed grinding
any one of these
✅ The correct answer is option C.
35. In electro-discharge machining, dielectric is used to
help in the movement of the sparks
control the spark discharges
act as coolant
all of these
✅ The correct answer is option D.
36. The cutting speed is zero at the periphery and it is maximum at the centre of the drill.
Yes
No
✅ The correct answer is option B.
37. 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
✅ The correct answer is option B.
38. The operation of producing grooves around the periphery of a cylindrical or conical workpiece is called
profile milling
gang milling
saw milling
helical milling
✅ The correct answer is option D.
39. The operation of reproduction of an outline of a template on a workpiece is called face milling.
Yes
No
✅ The correct answer is option B.
40. The cutting speed of a drill varies from point to point on the cutting edge of the drill.
Correct
Incorrect
✅ The correct answer is option A.