Exercise: Machine Design

Questions for: Machine Design

When the frictional force helps to apply the brake, then the brake is said to be self-energizing brake.
A:
Correct
B:
Incorrect
C:
D:
Answer: A
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An imaginary circle which by pure rolling action gives the same motion as the actual gear, is called
A:
addendum circle
B:
dedendum circle
C:
pitch circle
D:
clearance circle
Answer: C
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In a journal bearing, the load on the bearing is __________ to the axis of the journal.
A:
parallel
B:
perpendicular
C:
D:
Answer: B
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When a closely coiled helical spring is subjected to a couple about its axis, the stress induced in the wire material of the spring is
A:
bending stress only
B:
a combination of torsional shear stress and bending
C:
direct shear stress only
D:
a combination of bending stress and direct shear stress
Answer: A
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While designing a screw in a screw jack against buckling failure, the end conditions for the screw are taken as
A:
both the ends fixed
B:
both the ends hinged
C:
one end fixed and the other end hinged
D:
one end fixed and the other end free
Answer: D
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