Course=B.Tech, Civil Engg

Subject=Structural Design-I

The minimum number of main steel bars provided in R.C.C.

Optional Answers

(a) rectangular columns is 4

(b) circular columns is 6

(c) octagonal columns is 8

(d) all the above

Sollution

(d) all the above

An R.C.C. column is treated as long if its slenderness ratio is greater than

Optional Answers

(a) 12

(b) 15

(c) 10

(d) 8

Sollution

(a) 12

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

Optional Answers

(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 the above

Sollution

(d) least of the above

The transverse reinforcements provided at right angles to the main reinforcement

Optional Answers

(a) distribute the load

(b) resist the temperature stresses

(c) resist the shrinkage stress

(d) all the above.

Sollution

(d) all the above.

The amount of reinformcement for main bars in a slab, is based upon

Optional Answers

(a) minimum bending moment

(b) maximum bending moment

(c) maximum shear force

(d) minimum shear force.

Sollution

(b) maximum bending moment

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

Optional Answers

(a) 0.10%

(b) 0.12%

(c) 0.15%

(d) 0.18%

(e) 0.20%

Sollution

(b) 0.12%

An R.C.C. roof slab is designed as a two way slab if

Optional Answers

(a) it supports live loads in both directions

(b) the ratio of spans in two directions is less than 2

(c) the slab is continuous over two supports

(d) the slab is discontinuous at edges.

Sollution

(b) the ratio of spans in two directions is less than 2

Minimum spacing between horizontal parallel reinforcement of different sizes, should not be less than

Optional Answers

(a) one diameter of thinner bar

(b) one diameter of thicker bar

(c) sum of the diameters of ihinner and thicker bars

(d) twice the diameter of thinner bar

(e) none of these.

Sollution

(b) one diameter of thicker bar

The minimum clear cover for R.C.C. columns shall be

Optional Answers

(a) greater of 40 mm or diameter

(b) smaller of 40 mm or diameter

(c) greater of 25 mm or diameter

(d) smaller of 25 mm or diameter

Sollution

(a) greater of 40 mm or diameter

A T-beam behaves as a rectangular beam of a width equal to its flange if its neutral axis

Optional Answers

(a) remains within the flange

(b) remains below the slab

(c) coincides the geometrical centre of the beam

(d) none of these

Sollution

(a) remains within the flange

The advantage of reinforced concrete, is due to

Optional Answers

(a) monolithic character

(b) fire-resisting and durability

(c) economy because of less maintenance cost

(d) moulding in any desired shape

(e) All the above.

Sollution

(e) All the above.

The shear reinforcement in R.C.C. is provided to resist

Optional Answers

(a) vertical shear

(b) horizontal shear

(c) diagonal compression

(d) diagonal tension.

Sollution

(a) vertical shear

(d) diagonal tension.

Distribution reinforcement in a simply supported slab, is provided to distribute

Optional Answers

(a) load

(b) temperature stress

(c) shrinkage stress

(d) all the above

Sollution

(d) all the above

The maximum ratio of span to depth of a cantilever slab, is

Optional Answers

(a) 8

(b) 10

(c) 12

(d) 14

(e) 16

Sollution

(c) 12

If the diameter of longitudinal bars of a square column is 16 mm, the diameter of lateral ties should not be less than

Optional Answers

(a) 4mm

(b) 5mm

(c) 6mm

(d) 8mm

(e) 10mm

Sollution

(c) 6mm

The steel generally used in R.C.C. work, is

Optional Answers

(a) stainless

(b) mildsteel

(c) high carbon steel

(d) high tension steel.

Sollution

(b) mildsteel

Pick up the correct statement from the following:

Optional Answers

(a) Lateral reinforcement in R.C.C. columns is provided to prevent the longitudinal reinforcement from buckling

(b) Lateral reinforcement prevents the shearing of concrete on diagonal plane

(c) Lateral reinforcement stops breaking away of concrete cover, due to buckling

(d) Lateral reinforcement in R.C.C. columns, is kept not less than 5 mm diameter

(e) All the above.

Sollution

(e) All the above.

The allowable tensile stress in mild steel stirrups, reinforced cement concrete, is

Optional Answers

(a) 1400 kg/cm2

(b) 190 kg/cm2

(c) 260 kg/cm2

(d) 230 kg/cm2

Sollution

(a) 1400 kg/cm2

In a slab, the pitch of the main reinforcement should not exceed its effective depth

Optional Answers

(a) three times

(b) four times

(c) five times

(d) two times.

Sollution

(a) three times

The modular ratio m of a concrete whose permissible compressive stress is C, may be obtained from the equation.

Optional Answers

(a) m = 700/3C

(b) m = 1400/3C

(c) m = 2800/3C

(d) m = 3500/3C

(e) m = 2300/3C

Sollution

(c) m = 2800/3C

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