A T-beam behaves as a rectangular beam of a width equal to its flange if its neutral axis

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

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

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

In case of an under-reinforced beam, the depth of actual neutral axis is __________ that of the critical neutral axis.

A

Same as

B

Less than

C

Greater than

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

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

$$\frac{{{\text{r}} - {\text{m}}}}{{\text{m}}} \times {\text{d}}$$

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

$${\text{d}} - \frac{{\text{n}}}{3}$$

In a marine flange coupling, the thickness of flange is taken as

A

$$\frac{{\text{d}}}{2}$$

B

$$\frac{{\text{d}}}{3}$$

C

$$\frac{{3{\text{d}}}}{4}$$

D

$$\frac{{\text{d}}}{4}$$

Rectangular ABCD is similar to rectangular EFGH. The length of each side of rectangle EFGH is 24 times the length of corresponding side of rectangle ABCD.The perameter of rectangular ABCD is 120 feet.What is the parameter of rectangular paramaeter EFGH?

A

288feet

B

345.6feet

C

576feet

D

691.2feet

A T-beam behaves as a rectangular beam of a width equal to its flange if its neutral axis

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