Free Printable Day 104-Jan 13-worksheet-Btech-WSM contd.

1.

The modular ratio used in Working Stress Method for RCC design is:

a)

$m = \dfrac{280}{3}\sigma_{cbc}$

b)

$m = \dfrac{3\sigma_{cbc}}{280}$

c)

$m = \dfrac{280}{\sigma_{st}}$

d)

$m = \dfrac{\sigma_{st}}{280}$

2.

The permissible tensile stress in Fe 415 steel as per WSM is:

a)

140 N/mm²

b)

190 N/mm²

c)

230 N/mm²

d)

275 N/mm²

3.

The critical depth of neutral axis in WSM depends mainly on:

a)

Grade of concrete

b)

Area of steel

c)

Grade of steel

d)

Breadth of beam

4.

The ratio of critical neutral axis depth to effective depth for Fe 250 steel is:

a)

0.253d

b)

0.289d

c)

0.40d

d)

0.48d

5.

A section in which actual neutral axis depth is less than the critical neutral axis depth is called:

a)

Balanced section

b)

Over-reinforced section

c)

Under-reinforced section

d)

Compression section

6.

In WSM, the stress–strain relationship of concrete is assumed to be linear.

a)

True

b)

False

7.

In an over-reinforced section, steel reaches its permissible stress before concrete.

a)

True

b)

False

8.

Stress in concrete at the level of compression reinforcement is denoted by ________.

a)

$\sigma_{c'}$

b)

$\sigma_{st}$

c)

$\sigma_{cbc}$

d)

$\sigma_{ct}$

9.

The compressive force in concrete of a rectangular beam in WSM equals ________.

a)

$\dfrac{1}{2}\sigma_{cbc}\, b\, x_a$

b)

$\sigma_{cbc}\, b\, x_a$

c)

$\dfrac{2}{3}\sigma_{cbc}\, b\, x_a$

d)

$\dfrac{1}{3}\sigma_{cbc}\, b\, x_a$

10.

The lever arm in WSM for singly reinforced beams is approximately equal to ________.

a)

$d - \dfrac{x_a}{3}$

b)

$d - \dfrac{x_a}{2}$

c)

$d - \dfrac{2x_a}{3}$

d)

$d - x_a$

11.

The value of $\dfrac{x_c}{d}$ for Fe 415 steel is (a) .

12.

In an under-reinforced section, actual depth of neutral axis is (a) the critical depth.

13.

Moment of resistance of concrete in WSM is based on (a) stress.

14.

A singly reinforced beam has b = 300 mm, d = 500 mm and Fe 415 steel. Find the critical depth of neutral axis and identify the type of section.

(a)

15.

A singly reinforced beam has b = 400 mm, d = 550 mm, Ast = 4 bars of 16 mm diameter, Fe 415 steel.M20 concrete ⇒ σcbc = 7 N/mm2. Using WSM, the moment of resistance is :

(a)

Day 104-Jan 13-worksheet-Btech-WSM contd.

Total questions: 15

Worksheet time: 10mins

Similar Resources on Wayground