Exercise: Machine Design

Questions for: Machine Design

If a bearing is designated by the number 305, it means that the bearing is of
A:
light series whose bore is 5 mm
B:
light series whose bore is 25 mm
C:
medium series whose bore is 5 mm
D:
medium series whose bore is 25 mm
Answer: D
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When a bolt and nut is made of mild steel, then the effective height of nut is made equal to (where d = Nominal diameter of bolt)
A:
0.5 d
B:
0.75 d
C:
d
D:
1.25 d
Answer: C
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For low and moderate speed engines, the cam follower should move with
A:
uniform velocity
B:
simple harmonic motion
C:
uniform accleration and retardation
D:
cycloidal motion
Answer: B
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The surface finish factor for a mirror polished material is
A:
0.45
B:
0.65
C:
0.85
D:
1
Answer: D
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The elasticity is the property of a material which enables it to
A:
regain its original shape after deformation when the external forces are removed
B:
draw into wires by the application of a tensile force
C:
resist fracture due to high impact loads
D:
retain deformation produced under load permanently
Answer: A
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