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Mechanical Engineering - Production Engineering

Exercise : Production Engineering - Section 6
21.
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.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
22.
The tool life in case of a grinding wheel is the time
between two successive regrinds of the wheel
taken for the wheel to be balanced
taken between two successive wheel dressings
taken for a wear of 1 mm on its diameter
Answer: Option
Explanation:
No answer description is available. Let's discuss.
23.
In which of the following machine, the work is usually rotated while the drill is fed into work?
Sensitive drilling machine
Radial drilling machine
Gang drilling machine
Deep hole drilling machine
Answer: Option
Explanation:
No answer description is available. Let's discuss.
24.
In twist fluted drills, chips do not move out automatically.
Correct
Incorrect
Answer: Option
Explanation:
No answer description is available. Let's discuss.
25.
Mild steel during machining produces __________ chips.
continuous
discontinuous
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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