Structural Analysis
For a symmetrical two hinged parabolic arch, if one of the supports settles horizontally, then the horizontal thrust

is decreased
is increased
becomes zero
remains unchanged

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Structural Analysis
Pick up the incorrect statement from the following:

None of these
The gross section of the web of plate girders is the depth of the web plate multiplied by its thickness
The gross section of the web of rolled I-beams is the depth of the beam multiplied by the web thickness
The gross section of the web of channels is the depth of the web multiplied by its thickness

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