Exercise: Machine Design

Questions for: Machine Design

The acme threads are usually found on
A:
spindles of bench vices
B:
railway carriage couplings
C:
feed mechanism of machine tools
D:
screw cutting lathes
Answer: D
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In designing a flange coupling, the pitch circle diameter of bolts is taken as (where d = Diameter of the shaft)
A:
2 d
B:
3 d
C:
4 d
D:
5 d
Answer: B
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Teflon is used for bearings because of
A:
low coefficient of friction
B:
better heat dissipation
C:
smaller space consideration
D:
all of these
Answer: A
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The taper on cotter and slot is made on both the sides.
A:
Agree
B:
Disagree
C:
D:
Answer: B
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The design calculations for members subject to fluctuating loads with the same factor of safety, yield the most conservative estimates when using
A:
Gerber relation
B:
Soderberg relation
C:
Good man relation
D:
none of these
Answer: C
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