Exercise: Machine Design

Questions for: Machine Design

When bevel gears having equal teeth and equal pitch angles connect two shafts whose axes intersect at right angle, then they are known as
A:
angular bevel gears
B:
crown bevel gears
C:
internal bevel gears
D:
mitre gears
Answer: D
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A taper key which fits half in the key way of the hub and half in the key way of shaft, is known as
A:
sunk key
B:
flat saddle key
C:
hollow saddle key
D:
tangent key
Answer: A
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When the shaft rotates in anticlockwise direction at slow speed in a bearing, it will
A:
have contact at the bottom most of the bearing
B:
move towards right of the bearing making the metal to metal contact
C:
move towards right of the bearing making no metal to metal contact
D:
move towards left of the bearing making metal to metal contact
Answer: D
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According to I.B.R., when the thickness of boiler shell (t) is greater than 8 mm, then the diameter of rivet hole (d) is obtained by
A:
equating tearing resistance of the plate to the shearing resistance of the rivets
B:
equating tearing resistance of the plate to the crushing resistance of the rivets
C:
equating shearing resistance to the crushing resistance of the rivets
D:
none of the above
Answer: D
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The standard length of the shaft is
A:
5 m
B:
6 m
C:
7 m
D:
all of these
Answer: D
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