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If the moment on a beam is increased three times, then to keep the stress in the beam same, the sectional modulus should be:
  • a)
    Increased 1.5 times
  • b)
    Increased 3 times
  • c)
    Decreased 3 times
  • d)
    Increased 6 times
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
If the moment on a beam is increased three times, then to keep the str...


Or simply we can say that for same stress, M∝Z
If M increased to three times, then Z should increase to three times.
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If the moment on a beam is increased three times, then to keep the stress in the beam same, the sectional modulus should be:a)Increased 1.5 timesb)Increased 3 timesc)Decreased 3 timesd)Increased 6 timesCorrect answer is option 'B'. Can you explain this answer?
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