The type of footing which is used to transmit heavy loads through steel columns is

If q is the punching shear resistance per unit area a, is the side of a square footing for a column of side b, carrying a weight W including the weight of the footing, the depth (D) of the footing from punching shear consideration, is

A

$${\text{D}} = \frac{{{\text{W}}\left( {{\text{a}} - {\text{b}}} \right)}}{{4{{\text{a}}^2}{\text{bq}}}}$$

B

$${\text{D}} = \frac{{{\text{W}}\left( {{{\text{a}}^2} - {{\text{b}}^2}} \right)}}{{4{{\text{a}}^2}{\text{bq}}}}$$

C

$${\text{D}} = \frac{{{\text{W}}\left( {{{\text{a}}^2} - {{\text{b}}^2}} \right)}}{{8{{\text{a}}^2}{\text{bq}}}}$$

D

$${\text{D}} = \frac{{{\text{W}}\left( {{{\text{a}}^2} - {{\text{b}}^2}} \right)}}{{4{\text{abq}}}}$$

In a combined footing for two columns carrying unequal loads, the maximum hogging bending moment occurs at

A

Less loaded column

B

More loaded column

C

A point of the maximum shear force

D

A point of zero shear force

A thin mild steel wire is loaded by adding loads in equal increments till it breaks. The extensions noted with increasing loads will behave as under

A

Uniform throughout

B

Increase uniformly

C

First increase and then decrease

D

Increase uniformly first and then increase rapidly

Gold is 19 times as heavy as water and Copper is 9 times as heavy as water. Calculate the ratio in which these two metals should be mixed so that the mixture is 15 times as heavy as water.

A

40

B

41

C

42

D

43

Bottom bars under the columns are extended into the interior of the footing slab to a distance greater than

A

42 diameters from the centre of the column

B

42 diameters from the inner edge of the column

C

42 diameters from the outer edge of the column

D

24 diameters from the centre of the column

Top bars are extended to the projecting parts of the combined footing of two columns L distance apart for a distance of

A

0.1 L from the outer edge of column

B

0.1 L from the centre edge of column

C

Half the distance of projection

D

One-fourth the distance of projection

If the width of the foundation for two equal columns is restricted, the shape of the footing generally adopted, is

A

Square

B

Rectangular

C

Trapezoidal

D

Triangular

Which type of heat exchanger is preferred for heavy heat loads?

A

Double pipe

B

Plate fine

C

Series and parallel set of shell and tube

D

None of these

The type of bond provided in brick masonry for carrying heavy loads is

A

Single Flemish bond

B

Double Flemish bond

C

English bond

D

Zigzag bond

Which D.C. motor will be suitable along with flywheel for intermittent light and heavy loads?

A

Series motor

B

Shunt motor

C

Cumulatively compounded motor

D

Differentially compounded motor

The type of footing which is used to transmit heavy loads through steel columns is

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