Question:

The percentage of minimum reinforcement of the gross sectional area in slabs, is

A.

0.10 %

B.

0.12 %

C.

0.15 %

D.

0.18%

Answer» c. 0.15 %

Question:

If the permissible compressive stress for a concrete in bending is C kg/m2 , the modular ratio is

A.

2800/C

B.

2300/2C

C.

2800/3C

D.

2800/C2

Answer» c. 2800/3C

Question:

An under-reinforced section means

A.

Steel is provided at the underside only

B.

Steel provided is insufficient

C.

Steel provided on one face only

D.

Steel will yieldfirst

Answer» d. Steel will yieldfirst

Question:

In a doubly-reinforced beam if and is the effective depth and is depth of critical neutral axis, the following relationship holds good

A.

mc/t = n/(d – n)

B.

(m + c)/t = n/(d + n)

C.

(t + c)/n = (d + n)/n

D.

mc/t = (d – n)/t

Answer» a. mc/t = n/(d – n)

Question:

If p1 is the vertical intensity of pressure at a depth h on a block of earth weighing w per unit p2 is

A.

wh (1 – cos )/(1 + )

B.

wh (1 – sin )/(1 + )

C.

wh (1 – tan )/(1 + )

D.

w (1 – cos )/h (1 + sin )

Answer» b. wh (1 – sin )/(1 + )

Question:

For a circular slab carrying a uniformly distributed load, the ratio of the maximumnegative to maximum positive radial moment, is

A.

1

B.

2

C.

3

D.

5

Answer» b. 2

Question:

The width of the flange of a T-beam should be less than

A.

One-third of the effective span of the T-beam

B.

Distance between the centres of T-beam

C.

Breadth of the rib plus twelve times the thickness of the slab

D.

Least of theabove

Answer» d. Least of theabove

Question:

In favourable circumstances a 15 cm concrete cube after 28 days, attains a maximum crushing strength

A.

100 kg/cm2

B.

200 kg/cm2

C.

300 kg/cm2

D.

400 kg/cm2

Answer» d. 400 kg/cm2

Question:

Pick up the incorrect statement from the following. The intensity of horizontal shear stress at the elemental part of a beam section, is directly proportional to

A.

Shear force

B.

Area of the section

C.

Distance of the C.G. of the area from its neutralaxis

D.

Moment of the beam section about its neutral axis

Answer» d. Moment of the beam section about its neutral axis

Question:

An R.C.C. beam not provided with shear reinforcement may develop cracks in its bottom inclined roughly to the horizontal at

A.

25°

B.

35°

C.

45°

D.

55°

Answer» c. 45°