tungsten
chromium
silicon
cobalt
✅ The correct answer is option D.
Production Engineering MCQs
62. The stroke of a shaping machine is 250 mm. It makes 30 double strokes per minute. The overall average speed of operation is
3.75 m/min
5 m/min
7.5 m/min
15 m/min
✅ The correct answer is option C.
63. The carbide tools operating at very low cutting speeds (below 30 m/min)
reduces tool life
increases tool life
have no effect on tool life
spoils the work piece
✅ The correct answer is option A.
64. When the grinding wheel is marked by the letters from I to P, it indicates that the grinding wheel is of hard grade.
TRUE
FALSE
✅ The correct answer is option B.
65. The trade name of a non-ferrous cast alloy composed of cobalt, chromium and tungsten is called
ceramic
stellite
diamond
cemented carbide
✅ The correct answer is option B.
66. The chamfering is an essential operation after
knurling
rough turning
boring
thread cutting
✅ The correct answer is option D.
67. The tailstock set over required to turn a taper on the entire length of a workpiece having diameters D and d is
D – d
✅ The correct answer is option C.
68. The part of the tool on which cutting edge is formed is called nose.
Correct
Incorrect
✅ The correct answer is option B.
69. In drilling softer materials, the cutting speed is __________ as compared to harder materials.
same
low
high
✅ The correct answer is option C.
70. The height of each tooth of a broach is
same throughout
in progressively decreasing order
in progressively increasing order
none of these
✅ The correct answer is option C.