CONCRETE TECHNOLOGY AND DESIGN OF CONCRETE STRUCTURES QUIZ

If the size of panel in a flat slab is 6m x 6m, then as per Indian Standard Code, the widths of column strip and middle strip are

1.5 m and 3.0 m

1.5 m and 1.5 m

3.0 m and 1.5 m

3.0 m and 3.0 m

TRUE ANSWER : ?
YOUR ANSWER : ?

Prestress loss due to friction occurs

only in post-tensioned beams

only in pretensioned beams

in both post-tensioned and preten-sioned beams

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following has high tensile strength ?

heat treated rolled wires

cold drawn wires

all have same tensile strength

plain hot rolled wires

TRUE ANSWER : ?
YOUR ANSWER : ?

Sinking of an intermediate support of a continuous beami) reduces the negative moment at supportii) increases the negative moment at supportiii) reduces the positive moment at center of spaniv) increases the positive moment at center of span The correct answer is

(i) and (iv)

(i) and (iii)

(ii) and (iv)

(ii) and (iii)

TRUE ANSWER : ?
YOUR ANSWER : ?

The maximum value of hoop compression in a dome is given by (where, w = load per unit area of surface of dome R = radius of curvature d = thickness of dome)

2wR/d

wR / 4d

wR/d

wR/2d

TRUE ANSWER : ?
YOUR ANSWER : ?

Cube strength of controlled concrete to be used for pretensioned and post-tensioned work respectively should not be less than

53 MPa and 42 MPa

42 MPa and 53 MPa

35 MPa and 42 MPa

42 MPa and 35 MPa

TRUE ANSWER : ?
YOUR ANSWER : ?

In the design of a front counterfort in a counterfort retaining wall, the main reinforcement is provided oni) bottom face near counterfortii) top face near counterfortiii) bottom face near centre of spaniv) top face near centre of span The correct answer is

both (i) and (iv)

both (ii) and (iii)

only (i)

only (ii)

TRUE ANSWER : ?
YOUR ANSWER : ?

In symmetrically reinforced sections, shrinkage stresses in concrete and steel are respectively

both compressive

compressive and tensile

both tensile

tensile and compressive

TRUE ANSWER : ?
YOUR ANSWER : ?

1% of voids in a concrete mix would reduce its strength by about

20%

15%

5%

10 %

TRUE ANSWER : ?
YOUR ANSWER : ?

In counterfort retaining walls, the main reinforcement in the stem at support is

Not provided

Provided only on front face

Provided only on inner face

Provided both on inner and front faces

TRUE ANSWER : ?
YOUR ANSWER : ?

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