Related Questions

The moment of inertia of a triangular section (base b, height h) about centroidal axis parallel to the base, is
A $$\frac{{{{\text{b}}^3}{\text{h}}}}{{12}}$$
B $$\frac{{{\text{b}}{{\text{h}}^3}}}{3}$$
C $$\frac{{{\text{b}}{{\text{h}}^3}}}{{36}}$$
D $$\frac{{{\text{b}}{{\text{h}}^3}}}{2}$$
The ratio of the moment of inertia of a rectangle about its centroidal axis to the moment of inertia about its base, is
A $$\frac{1}{4}$$
B $$\frac{1}{2}$$
C $$\frac{3}{4}$$
D $$2$$
Moment of inertia of a triangular section of base (b) and height (h) about an axis passing through its vertex and parallel to the base, is __________ than that passing through its C.G. and parallel to the base.
A Nine times
B Six times
C Four times
D Two times
Moment of inertia of a triangular section of base (b) and height (h) about an axis passing through its C.G. and parallel to the base, is
A $$\frac{{{\text{b}}{{\text{h}}^3}}}{4}$$
B $$\frac{{{\text{b}}{{\text{h}}^3}}}{8}$$
C $$\frac{{{\text{b}}{{\text{h}}^3}}}{{12}}$$
D $$\frac{{{\text{b}}{{\text{h}}^3}}}{{36}}$$
In order to have a connecting rod equally strong in buckling about X-axis and Y-axis, the moment of inertia about X-axis should be __________ the moment of inertia about Y-axis.
A Equal to
B Twice
C Three times
D Four times
Moment of inertia of a triangular section of base (b) and height (h) about an axis through its base, is
A $$\frac{{{\text{b}}{{\text{h}}^3}}}{4}$$
B $$\frac{{{\text{b}}{{\text{h}}^3}}}{8}$$
C $$\frac{{{\text{b}}{{\text{h}}^3}}}{{12}}$$
D $$\frac{{{\text{b}}{{\text{h}}^3}}}{{36}}$$
If the tendon is placed at an eccentricity e below the centroidal axis of the longitudinal axis of a rectangular beam (sectional modulus Z and stressed load P in tendon) the stress at the extreme top edge
A Is increased by $$\frac{{{\text{PZ}}}}{{\text{e}}}$$
B Is increased by $$\frac{{{\text{Pe}}}}{{\text{Z}}}$$
C Is decreased by $$\frac{{{\text{Pe}}}}{{\text{Z}}}$$
D Remains unchanged
The moment of inertia of a triangular section (height h, base b) about its base, is
A $$\frac{{{\text{b}}{{\text{h}}^2}}}{{12}}$$
B $$\frac{{{{\text{b}}^2}{\text{h}}}}{{12}}$$
C $$\frac{{{\text{b}}{{\text{h}}^3}}}{{12}}$$
D $$\frac{{{{\text{b}}^3}{\text{h}}}}{{12}}$$
If a number of coplanar forces acting at a point be in equilibrium, the sum of clockwise moments must be __________ the sum of anticlockwise moments, about any point.
A Equal to
B Less than
C Greater than
D None of these
If ‘A’ is the sectional area of a pre-stressed rectangular beam provided with a tendon pre-stressed by a force ‘P’ through its centroidal longitudinal axis, the compressive stress in concrete, is
A $$\frac{{\text{P}}}{{\text{A}}}$$
B $$\frac{{\text{A}}}{{\text{P}}}$$
C $$\frac{{\text{P}}}{{2{\text{A}}}}$$
D $$\frac{{2{\text{A}}}}{{\text{P}}}$$

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