# Practice Test: Question Set - 12

**1. 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 centers of T-beam

- (C) Breadth
of the rib plus twelve times the thickness of the slab

- (D) Least
of the above

**2. For a circular slab carrying a uniformly distributed load, the ratio of the maximum negative to maximum positive radial moment, is**

- (A) 1

- (B) 2

- (C) 3

- (D) 5

**3. According to I.S. : 456 specifications, the safe diagonal tensile stress for M 150 grade concrete, is**

- (A) 5
kg/cm

^{2}

- (B) 10 kg/cm

^{2}

- (C) 15 kg/cm

^{2}

- (D) 20 kg/cm

^{2}

**4. The width of the flange of a T-beam, which may be considered to act effectively with the rib depends upon**

- (A) Breadth of
the rib

- (B) Overall
thickness of the rib

- (C) Centre
to centre distance between T-beams

- (D) All the
above

**5. The maximum shear stress (**

*q*) in a rectangular beam is_{max}- (A) 1.25 times
the average

- (B) 1.50 times
the average

- (C) 1.75 times
the average

- (D) 2.0 times
the average

**6. If the sides of a slab simply supported on edges and spanning in two directions are equal, the maximum bending moment is multiplied by**

- (A) 0.2

- (B) 0.3

- (C) 0.4

- (D) 0.5

**7. If**

*K*is a constant depending upon the ratio of the width of the slab to its effective span*l*,*x*is the distance of the concentrated load from the nearer support,*bw*is the width of the area of contact of the concentrated load measured parallel to the supported edge, the effective width of the slab*be*is- (A)

*K*/

*x*(1 +

*x*/

*d*) +

*bw*

- (B)

*Kx*(1 -

*x*/

*l*) +

*bw*

- (C)

*Kx*(1 +

*x*/

*l*) +

*bw*

- (D) All the
above

**8. The length of the straight portion of a bar beyond the end of the hook, should be at least**

- (A) Twice
the diameter

- (B) Thrice
the diameter

- (C) Four
times the diameter

- (D) Seven
times the diameter

**9. If the maximum bending moment of a simply supported slab is M Kg.cm, the effective depth of the slab is (where Q is M.R. factor)**

- (A)

*M*/100

*Q*

- (B)

*M*/10√

*Q*

- (C) √(

*M*/

*Q*)

- (D) √(

*M*/100

*Q*)

**10. If ‘**

*H’*is the overall height of a retaining wall retaining a surcharge, the width of the base slab usually provided, is- (A) 0.3

*H*

- (B) 0.4

*H*

- (C) 0.5

*H*

- (D) 0.7

*H*

**11. If**

*S*, is the average bond stress on a bar of diameter ‘_{b}*d’*subjected to maximum stress ‘*t’*, the length of the embedment ‘*l’*is given by- (A)

*l*=

*dt*/

*S*

_{b}- (B)

*l*=

*dt*/2

*S*

_{b}- (C)

*l*=

*dt*/3

*S*

_{b}- (D)

*l*=

*dt*/4

*S*

_{b}**12. If diameter of a reinforcement bar is**

*d*, the anchorage value of the hook is- (A) 4

*d*

- (B) 8

*d*

- (C) 12

*d*

- (D) 16

*d*

**13. As per I.S. 456 - 1978, the pH value of water shall be**

- (A) Less than 6

- (B) Equal to 6

- (C) Not less
than 6

- (D) Equal to 7

**14. For M 150 mix concrete, according to I.S. specifications, local bond stress, is**

- (A) 5 kg/cm

^{2}

- (B) 10 kg/cm

^{2}

- (C) 15 kg/cm

^{2}

- (D) 20 kg/cm

^{2}

**15. The minimum cube strength of concrete used for a pre-stressed member, is**

- (A) 50 kg/cm

^{2}

- (B) 150 kg/cm

^{2}

- (C) 250 kg/cm

^{2}

- (D) 350 kg/cm

^{2}

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