Exercise: Machine Design

Questions for: Machine Design

According to Indian standards, a bolt thread of 6 mm size of coarse pitch and with allowance on the threads and normal tolerance grade is designated as
A:
M6
B:
M8
C:
M6 - 8d
D:
M8 - 6d
Answer: C
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When two non-parallel or intersecting but coplaner shafts are connected by gears, the arrangement is known as bevel gearing.
A:
Correct
B:
Incorrect
C:
D:
Answer: A
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According to I.B.R., the efficiency of a triple riveted butt joint with double straps of unequal width (5 rivets per pitch length) should be
A:
45 to 60%
B:
63 to 70%
C:
70 to 83%
D:
80 to 90%
Answer: D
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A connecting rod should be
A:
strong in buckling about X-axis
B:
strong in buckling about Y-axis
C:
equally strong in buckling about X-axis and Y-axis
D:
any one of the above
Answer: C
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When the length of the journal is equal to the diameter of the journal, then the bearing is said to be a
A:
short bearing
B:
long bearing
C:
medium bearing
D:
square bearing
Answer: D
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