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paper of B.Tech, Civil Engg Structural Design-I Manipal University Jaipur

# Course=B.Tech, Civil EnggSubject=Structural Design-I

## Question no-1The minimum number of main steel bars provided in R.C.C.

(a)                  rectangular columns is 4

(b)                  circular columns is 6

(c)                  octagonal columns is 8

(d)                  all the above

Sollution

(d)                  all the above

## Question no-2An R.C.C. column is treated as long if its slenderness ratio is greater than

(a)                  12

(b)                  15

(c)                  10

(d)                  8

Sollution

(a)                  12

## Question no-3The 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 the above

Sollution

(d)                  least of the above

## Question no-4The transverse reinforcements provided at right angles to the main reinforcement

(b)                  resist the temperature stresses

(c)                  resist the shrinkage stress

(d)                  all the above.

Sollution

(d)                  all the above.

## Question no-5The amount of reinformcement for main bars in a slab, is based upon

(a)                  minimum bending moment

(b)                  maximum bending moment

(c)                  maximum shear force

(d)                  minimum shear force.

Sollution

(b)                  maximum bending moment

## Question no-6The percentage of minimum reinforcement (HYSD) of the gross sectional area in slabs, is

(a)                  0.10%

(b)                  0.12%

(c)                  0.15%

(d)                  0.18%

(e)                  0.20%

Sollution

(b)                  0.12%

## Question no-7An R.C.C. roof slab is designed as a two way slab if

(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

## Question no-8Minimum spacing between horizontal parallel reinforcement of different sizes, should not be less than

(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

## Question no-9The minimum clear cover for R.C.C. columns shall be

(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

## Question no-10A 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

Sollution

(a)                  remains within the flange

## Question no-11The advantage of reinforced concrete, is due to

(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.

## Question no-12The shear reinforcement in R.C.C. is provided to resist

(a)                  vertical shear

(b)                  horizontal shear

(c)                  diagonal compression

(d)                  diagonal tension.

Sollution

(a)                  vertical shear

(d)                  diagonal tension.

## Question no-13Distribution reinforcement in a simply supported slab, is provided to distribute

(b)                  temperature stress

(c)                  shrinkage stress

(d)                  all the above

Sollution

(d)                  all the above

## Question no-14The maximum ratio of span to depth of a cantilever slab, is

(a)                  8

(b)                  10

(c)                  12

(d)                  14

(e)                  16

Sollution

(c)                  12

## Question no-15If the diameter of longitudinal bars of a square column is 16 mm, the diameter of lateral ties should not be less than

(a)                  4mm

(b)                  5mm

(c)                  6mm

(d)                  8mm

(e)                  10mm

Sollution

(c)                  6mm

## Question no-16The steel generally used in R.C.C. work, is

(a)                  stainless

(b)                  mildsteel

(c)                  high carbon steel

(d)                  high tension steel.

Sollution

(b)                  mildsteel

## Question no-17Pick up the correct statement from the following:

(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.

## Question no-18The allowable tensile stress in mild steel stirrups, reinforced cement concrete, is

(a)                  1400 kg/cm2

(b)                  190 kg/cm2

(c)                  260 kg/cm2

(d)                  230 kg/cm2

Sollution

(a)                  1400 kg/cm2

## Question no-19In a slab, the pitch of the main reinforcement should not exceed its effective depth

(a)                  three times

(b)                  four times

(c)                  five times

(d)                  two times.

Sollution

(a)                  three times

## Question no-20The modular ratio m of a concrete whose permissible compressive stress is C, may be obtained from the equation.

(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 