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Applied Mechanics and Graphic Statics - Interview Questions and Answers

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6. If a set of given forces are such that their free vectors build a closed polygon, then
A. the resultant force and resultant couple are always zero
B. the resultant force is zero but resultant couple is not zero
C. the resultant force is zero but resultant couple may not be zero
D. the resultant force and resultant couple both may not be zero
Explanation:
7. In which of the following trusses, the method of substitution is required for determining the forces in all the members of the truss by graphic statics ?
A. howe truss
B. king post truss
C. fink truss
D. warren truss
Explanation:
8. The force polygon representing a set of forces in equilibrium is a
A. triangle
B. open polygon
C. closed polygon
D. parallelogram
Explanation:
9. The number of funicular polygons which can be drawn to pass through two specified points in the space diagram are
A. zero
B. 1
C. 2
D. infinity
Explanation:
10. A system of copianar forces is in equilibrium when
A. force polygon closes
B. funicular polygon closes
C. both force polygon" and funicular polygon close
D. all the forces are concurrent
Explanation: