Engineering Mechanics - Mechanical Engineering (MCQ) questions and answers for Q. 11286

Q.  If a truss consists of 8 joints, 10 members and 4 reaction components then, it is a __________
- Published on 18 Sep 15

a. cantilever truss
b. defficient truss
c. redundant truss
d. none of the above

ANSWER: defficient truss
 

    Discussion

  • shekhar chaudhary   -Posted on 18 Apr 17
    Condition for redundant: n>2J-R
    Condition for defficient: n<2J-R
    where, n-Member of truss, J- joints, R-reaction

    Substituting in the above we get, it is defficient Truss.
  • Sravanthi   -Posted on 16 Dec 15
    - The condition for redundant truss is n > 2j – R

    Given: joints = 8, number of members = 10 and reaction components = 4

    Substituting the given values in the condition n > 2j – R

    10 > (2 x 8) - 4

    10 < 12, hence it is a not a redundant truss

    For deficient truss, n < 2j – R

    In this condition, 10 < 12

    Therefore, the truss is a deficient truss.

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