111. Ultra-sonic machining is best suited for
tool steels
sintered carbides
glass
all of these
✅ The correct answer is option D.
Production Engineering MCQs
112. A grinding wheel is said to be of __________ if it holds the abrasive grains more securely.
soft grade
medium grade
hard grade
✅ The correct answer is option C.
113. Tumbler gears in lathe are used to
reduce the spindle speed
cut gears
give desired direction of movement to the lathe carriage
drill a workpiece
✅ The correct answer is option C.
114. 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
✅ The correct answer is option B.
115. In drilling bakellite and fibrous plastics, the point angle of a drill is
90°
118°
135°
150°
✅ The correct answer is option A.
116. The size of a lathe is specified by the
length between centres
swing diameter over the bed
swing diameter over the carriage
all of these
✅ The correct answer is option D.
117. Ceramic cutting tools are
made by cold pressing of aluminium oxide powder
available in the form of tips
brittle and have low bending strength
all of these
✅ The correct answer is option D.
119. In American Standard Association (A S A) system, if the tool nomenclature is 8-6-5-5-10-15-2 mm, then the side rake angle will be
5°
6°
8°
10°
✅ The correct answer is option B.
120. A dense structure of a grinding wheel is used for
hard materials
brittle materials
fnishing cuts
all of these
✅ The correct answer is option D.