281. 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
✅ The correct answer is option D.
Production Engineering MCQs
282. It is required to cut screw threads of 2 mm pitch on a lathe. The lead screw has a pitch of 6 mm. If the spindle speed is 60 r.p.m., then the speed of lead screw will be
10 r.p.m.
20 r.p.m.
120 r.p.m.
180 r.p.m.
✅ The correct answer is option B.
283. The correct sequence of the following parameters in order of their maximum to minimum influence on tool life is
feed rate, depth of cut, cutting speed
depth of cut, cutting speed, feed rate
cutting speed, feed rate, depth of cut
feed rate, cutting spe
✅ The correct answer is option C.
284. The relation between the tool life (T) in minutes and cutting speed (V) in m/min is (where n = An exponent, which depends upon the tool and workpiece, and C = A constant)
VnT = C
VTn = C
Vn/T = C
V/Tn = C
✅ The correct answer is option B.
285. For machining a mild steel workpiece using carbide tool, the maximum material will be removed at a temperature of
50°C
100°C
175°C
275°C
✅ The correct answer is option B.
286. In a plain milling machine, the table can be moved
longitudinally
crosswise
vertically
all of these
✅ The correct answer is option D.
287. Lathe bed is made of
mild steel
alloy steel
pig iron
chilled cast iron
✅ The correct answer is option D.
288. In which of the following machine, the work remains stationary and the tool is rotated?
Vertical boring machine
Horizontal boring machine
Precision boring machine
Jig boring machine
✅ The correct answer is option B.
289. The guideways are of
flat type
V-type
dovetail type
any one of these
✅ The correct answer is option D.
290. Flank 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
cutting edge only
front face only
✅ The correct answer is option A.