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37.

The deformation of a spring produced by a unit load is called                        
A. stiffness B. flexibility
C. influence coefficient D. unit strain



38.

The degree of static indeterminacy of a pin-jointed space frame is given by
where m is number of unknown member forces, r is unknown reaction components and j is number of joints                        
A. m + r - 2j B. m + r - 3j
C. 3m + r - 3j D. m + r + 3j



39.

The degree of static indeterminacy of a rigid-jointed space frame is
where m, r and j have their usual meanings                        
A. m + r - 2j B. m + r - 3j
C. 3m + r - 3j D. 6m + r - 6j




40.

The degree of static indeterminacy up to which column analogy method can be used is                        
A. 2 B. 3
C. 4 D. unrestricted



41.

The fixed support in a real beam becomes in the conjugate beam a                        
A. roller support B. hinged support
C. fixed support D. free end



42.

The maximum bending moment due to a train of wheel loads on a simply supported girder                        
A. always occurs at center of span B. always occurs under a wheel load
C. never occurs under a wheel load D. none of the above



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