bevelling the extreme end of a workpiece
embossing a diamond shaped pattern on the surface of a workpiece
reducing the diameter of a workpiece over a very narrow surface
enlarging the end of a
✅ The correct answer is option C.
Production Engineering MCQs
72. A diamond locating pin is used in jigs and fixtures because
diamond is very hard and wear resistant
it occupies very little space
it helps in assembly with tolerance on centre distance
it has a long life
✅ The correct answer is option C.
73. Slow speed of the spindle is necessary in
thread cutting
turning a work of larger diameter
turning a hard or tough material
all of these
✅ The correct answer is option D.
74. The average cutting speed for turning mild steel with a high speed steel tool is
15 to 19 m/min
25 to 31 m/min
60 to 90 m/min
90 to 120 m/min
✅ The correct answer is option B.
75. In gear hobbing
only hob rotates
only gear blank rotates
both hob and gear blank rotates
neither hob nor gear b
✅ The correct answer is option C.
76. In a milling operation, two side milling cutters are mounted with a desired distance between them so that both sides of a workpiece can be milled simultaneously. This set up is called
gang milling
straddle milling
string milling
side milling
✅ The correct answer is option B.
77. The purpose of jigs and fixtures is to
increase machining accuracy
facilitate interchangeability
decrease expenditure on quality control
all of these
✅ The correct answer is option D.
78. Hard and tough materials like cast iron should be turned at
slow speed
high speed
any speed
certain specific speed
✅ The correct answer is option A.
79. The point angle of a drill, for drilling stainless steel, is
90°
118°
135°
150°
✅ The correct answer is option C.
80. Carbide tipped tools usually have
negative rake angle
positive rake angle
any rake angle
no rake angle
✅ The correct answer is option A.