21. The abrasive recommended for grinding materials of high tensile strength is
silicon carbide
aluminium oxide
sand stone
diamond
✅ The correct answer is option B.
Production Engineering MCQs
22. The main purpose of a boring operation, as compared to drilling, is to
drill a hole
finish the drilled hole
correct the hole
enlarge the existing h
✅ The correct answer is option D.
23. The operation of making a cone-shaped enlargement of the end of a hole is known as
counter-sinking
counter-boring
trepanning
spot facing
✅ The correct answer is option A.
24. An operation of embossing a diamond shaped pattern on the surface of a workpiece, is known as
counter-boring
grooving
knurling
facing
✅ The correct answer is option C.
25. The grinding of long, slender shafts or bars is usually done by
infeed grinding
through feed grinding
endfeed grinding
any one of these
✅ The correct answer is option B.
26. 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
✅ The correct answer is option A.
27. Crater wear leads to
increase in cutting temperature
weakening of tool
friction and cutting forces
all of these
✅ The correct answer is option D.
28. In conventional milling, the cutting force tends to lift the work.
TRUE
FALSE
✅ The correct answer is option A.
29. Glazing in grinding wheels __________ cutting capacity.
has no effect on
increase
decrease
✅ The correct answer is option C.
30. The chisel edge angle of a drill is usually 120° to 135°.
Correct
Incorrect
✅ The correct answer is option A.