Exercise: Machine Design

Questions for: Machine Design

The centre distance between two meshing involute gears is equal to
A:
B:
C:
D:
Answer: A
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Two shafts A and B under pure torsion are of identical length and identical weight and are made of the same material. The shaft A is solid and the shaft B is hollow. We can say that
A:
shaft B is better than shaft A
B:
shaft A is better than shaft B
C:
both the shafts are equally good
D:
Answer: A
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The load cup of a screw jack is made separate from the head of the spindle to
A:
enhance the load carrying capacity of the jack
B:
reduce the effort needed for lifting the working load
C:
prevent the rotation of load being lifted
D:
reduce the value of frictional torque
Answer: C
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The resistance to fatigue of a material is measured by
A:
elastic limit
B:
Young's modulus
C:
ultimate tensile strength
D:
endurance limit
Answer: D
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Stress concentration is caused due to
A:
variations in load acting on a member
B:
variations in properties of materials in a member
C:
abrupt change of cross-section
D:
all of these
Answer: C
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