1
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 $$ - 7.5\,N/n{m^2}$$
2
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
$$0$$
3
GATE CE 1990
MCQ (Single Correct Answer)
+1
-0.3
A cylindrical tank of radius $$'r'$$ and wall thickness $$'t'$$ has flat end closures. The tank is subjected to an internal pressure $$P.$$ The longitudinal $$\left( {{\sigma _x}} \right)$$ and the circumferential $$\left( {{\sigma _\theta }} \right)$$ stresses respectively are given by:
A
$$Pr/t:0$$
B
$$Pr/2t:Pr/t$$
C
$$Pr/4t:Pr/3t$$
D
$$Pr/6t:Pr/t$$
4
GATE CE 1990
MCQ (Single Correct Answer)
+2
-0.6
A rigid rod $$AB$$ of length $$L$$ is hinged at $$A$$ and is maintained in its vertical position by two springs with spring constants $$K$$ attached at end $$B.$$ The system is under stable equilibrium under the action of load $$P$$ when $$P < \,{P_{Cr}}$$. The system will be in unstable equilibrium when $$P$$ attains a value greater than GATE CE 1990 Strength of Materials Or Solid Mechanics - Columns and Struts Question 7 English
A
$$kL$$
B
$$k/L$$
C
$$2kL$$
D
$$4kL$$
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