Related Questions

If the depth of actual neutral axis in a beam is more than the depth of critical neutral axis, then the beam is called
A Balanced beam
B Under reinforced beam
C Over reinforced beam
D None of the above
If the modular ratio is ‘m’, steel ratio is ‘r’ and overall depth of a beam is ‘d’, the depth of the critical neutral axis of the beam, is
A $$\frac{{\text{m}}}{{{\text{m}} - {\text{r}}}} \times {\text{d}}$$
B $$\frac{{\text{m}}}{{{\text{m}} + {\text{r}}}} \times {\text{d}}$$
C $$\frac{{{\text{m}} + {\text{r}}}}{{\text{m}}} \times {\text{d}}$$
D $$\frac{{{\text{r}} - {\text{m}}}}{{\text{m}}} \times {\text{d}}$$
A simply supported beam 'A' of length l, breadth b, and depth d carries a central point load W. Another beam 'B' has the same length and depth but its breadth is doubled. The deflection of beam 'B' will be __________ as compared to beam 'A'.
A One-fourth
B One-half
C Double
D Four times
The rectangular beam 'A ' has length l, width b and depth d. Another beam 'B' has the same width and depth but length is double that of 'A'. The elastic strength of beam 'B' will be __________ as compared to beam A.
A Same
B One-half
C One-fourth
D One-eighth
The rectangular beam 'A' has length l, width b and depth d. Another beam 'B' has the same length and width but depth is double that of 'A'. The elastic strength of beam B will be __________ as compared to beam A.
A Same
B Double
C Four times
D Six times
In a doubly-reinforced beam if ‘c’ and ‘t’ are stresses in concrete and tension reinforcement, ‘d’ is the effective depth and ‘n’ is depth of critical neutral axis, the following relationship holds good
A $$\frac{{{\text{mc}}}}{{\text{t}}} = \frac{{\text{n}}}{{{\text{d}} - {\text{n}}}}$$
B $$\frac{{{\text{m}} + {\text{c}}}}{{\text{t}}} = \frac{{\text{n}}}{{{\text{d}} + {\text{n}}}}$$
C $$\frac{{{\text{t}} + {\text{c}}}}{{\text{m}}} = \frac{{{\text{d}} + {\text{n}}}}{{\text{n}}}$$
D $$\frac{{\text{m}}}{{{\text{t}} + {\text{c}}}} = \frac{{\text{n}}}{{{\text{d}} - {\text{n}}}}$$
The rectangular beam 'A' has length ‘l’, width ‘b’ and depth ‘d’. Another beam 'B' has the same length and depth but width is double that of 'A'. The elastic strength of beam 'B' will be _________ as compared to beam ‘A’.
A Same
B Double
C Four times
D Six times
If d and n are the effective depth and depth of the neutral axis respectively of a singly reinforced beam, the lever arm of the beam, is
A d
B n
C $${\text{d}} + \frac{{\text{n}}}{3}$$
D $${\text{d}} - \frac{{\text{n}}}{3}$$
A T-beam behaves as a rectangular beam of a width equal to its flange if its neutral axis
A Remains within the flange
B Remains below the slab
C Coincides the geometrical centre of the beam
D None of these
In a D.C. generator the magnetic neutral axis coincides with the geometrical neutral axis, when
A There is no load on the generator
B The generator runs on full load
C The generator runs on overload
D The generator runs on designed speed

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