Exercise: Machine Design

Questions for: Machine Design

According to Guest's theory, the failure occurs at a point in a member when the maximum shear stress in a bi-axial stress system reaches the shear stress at elastic limit in simple tension test.
A:
True
B:
False
C:
D:
Answer: A
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The pipe joint mostly used for pipes carrying water at low pressures is
A:
socket joint
B:
nipple joint
C:
union joint
D:
spigot and socket joint
Answer: A
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The constant factor in case of R10 series of preferred numbers is
A:
1.06
B:
1.12
C:
1.26
D:
1.58
Answer: C
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In unilateral system of tolerance, the tolerance is allowed on
A:
one side of the actual size
B:
one side of the nominal size
C:
both sides of the actual size
D:
both sides of the nominal size
Answer: B
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An open belt drive is used when
A:
shafts are arranged parallel and rotate in the opposite directions
B:
shafts are arranged parallel and rotate in the same directions
C:
shafts are arranged at right angles and rotate in one definite direction
D:
driven shaft is to be started or stopped whenever desired without interferring with the driving shaft
Answer: B
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