# Practice Test: Question Set - 08

**1. The ratio of the breadth to effective depth of a beam is kept**

- (A) 0.25

- (B) 0.50

- (C) 0.70

- (D) 0.75

**2. In a cantilever retaining wall without a heel slab**

- (A) Thickness
of the stem is kept same throughout

- (B) Base
slab is made 10 cm thicker than the stem

- (C) Width
of the base slab is kept 0.7 time the total height of the wall

- (D) All
the above

**3.**

*‘P’*is the pre-stressed force applied to the tendon of a rectangular pre-stressed beam whose area of cross section is ‘*A’*and sectional modulus is ‘*Z’*. The maximum stress ‘*f’*in the beam, subjected to a maximum bending moment ‘*M’*, is- (A)

*f =*(

*P*/

*A*)

*+*

*(*

*Z*/

*M*)

- (B)

*f =*(

*A*/

*P*)

*+*

*(*

*M*/

*Z*)

- (C)

*f =*(

*P*/

*A*)

*+*

*(*

*M*/

*Z*)

- (D)

*f =*(

*P*/

*A*)

*+*

*(*

*M*/6

*Z*)

**4. 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

**5. For the design of a simply supported T-beam the ratio of the effective span to the overall depth of the beam is limited to**

- (A) 10

- (B) 15

- (C) 20

- (D) 25

**6. A reinforced concrete cantilever beam is 3.6 m long, 25 cm wide and has its lever arm 40 cm. It carries a load of 1200 kg at its free end and vertical stirrups can carry 1800 kg. Assuming concrete to carry one-third of the diagonal tension and ignoring the weight of the beam, the number of shear stirrups required, is**

- (A) 30

- (B) 35

- (C) 40

- (D) 45

**7. The width of the rib of a T-beam, is generally kept between**

- (A) 1/7 to 1/3
of rib depth

- (B) 1/3
to 1/2 of rib depth

- (C) 1/2 to 3/4
of rib depth

- (D) 1/3 to 2/3
of rib depth

**8. A ribbed slab is provided for**

- (A) A plain
ceiling

- (B) Thermal
insulation

- (C) Acoustic
insulation

- (D) All the
above

**9. To ensure that the hogging bending moment at two points of suspension of a pile of length**

*L*equals the sagging moment at its centre, the distances of the points of suspension from either end, is- (A) 0.107

*L*

- (B) 0.207

*L*

- (C) 0.307

*L*

- (D) 0.407

*L*

**10. The stresses developed in concrete and steel in reinforced concrete beam 25 cm width and 70 cm effective depth, are 62.5 kg/cm**

^{2}and 250 kg/cm^{2}respectively. If*m*= 15, the depth of its neutral axis is- (A) 20 cm

- (B) 25 cm

- (C) 30 cm

- (D) 35 cm

**11. If the depth of actual neutral axis of a doubly reinforced beam**

- (A) Is
greater than the depth of critical neutral axis, the concrete attains its
maximum stress earlier

- (B) Is less than
the depth of critical neutral axis, the steel in the tensile zone attains its
maximum stress earlier

- (C) Is
equal to the depth of critical neutral axis; the concrete and steel attain
their maximum stresses simultaneously

- (D) All
the above

**12. 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) [

*m*/(

*m*-

*r*)]

*d*

- (B) [

*m*/(

*m*+

*r*)]

*d*

- (C) [(

*m*+

*r*)/

*m*]

*d*

- (D) [(

*r*-

*m*)/

*m*]

*d*

**13. The maximum diameter of a bar used in a ribbed slab, is**

- (A) 12 mm

- (B) 6 mm

- (C) 20 mm

- (D) 22 mm

**14. A column is regarded as long column if the ratio of its effective length and lateral dimension, exceeds**

- (A) 10

- (B) 15

- (C) 20

- (D) 25

**15. According to the steel beam theory of doubly reinforced beams**

- (A) Tension
is resisted by tension steel

- (B) Compression
is resisted by compression steel

- (C) Stress
in tension steel equals the stress in compression steel

- (D) All
the above

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