1
GATE CE 1990
MCQ (Single Correct Answer)
+2
-0.6
A rectangular simply supported prestressed concrete beam of span $$L$$ is subjected to a prestressing force of $$P$$ acting centrally at end sections and the prestress tendons are parabolically draped with maximum eccentricity of $${e_{\max }}$$ at the mid span section. The uniformly distributed upward load $$(W)$$ on the beam due to prestressing will be:
A
$$16\,\,P\,{e_{\max }}/{L^2}$$
B
$$4\,\,P\,{e_{\max }}/{L^2}$$
C
$$12\,\,P\,{e_{\max }}/{L^2}$$
D
$$8\,\,P\,{e_{\max }}/{L^2}$$
2
GATE CE 1990
MCQ (Single Correct Answer)
+1
-0.3
The principle of superposition is made use of in structural computations when:
A
The geometry of the structure changes by a finite amount during the application of the loads.
B
The changes in the geometry of the structure during the application if the loads is too small and the strain in the structure are directly proportional to the corresponding stresses.
C
The strains in the structure are not directly proportional to the corresponding stresses, even though the effect of changes in geometry can be neglected.
D
None of the above conditions are met.
3
GATE CE 1990
MCQ (Single Correct Answer)
+2
-0.6
The magnitude of the only shear stresses acting at a point in plane stress situation is $$7.5\,N/n{m^2}.$$ The magnitudes of the principle stresses will be:
A
$$ + \,15.0\,N/n{m^2}$$ and $$ - 7.5\,N/n{m^2}$$
B
$$ + \,7.5\,N/n{m^2}$$ and $$ - 15.0\,N/n{m^2}$$
C
$$ + \,7.5\,N/n{m^2}$$ and $$ - 7.5\,N/n{m^2}$$
D
$$ + \,10.0\,N/n{m^2}$$ and $$ - 7.5\,N/n{m^2}$$
4
GATE CE 1990
MCQ (Single Correct Answer)
+2
-0.6
Two elastic rods $$AB$$ and $$BC$$ are hinged at $$B$$. The joint $$A$$ is a hinged one, joint $$C$$ is over a roller and the joint $$B$$ is supported on a spring having its stiffness as $$K.$$ GATE CE 1990 Strength of Materials Or Solid Mechanics - Deflection of Beams Question 16 English

A load $$P$$ acts at mid-point of the rod $$BC$$. The downward deflection of joint $$B$$ is:

A
$$P/K$$
B
$$2P/K$$
C
$$P/2K$$
D
$$0$$
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