CONCRETE TECHNOLOGY AND DESIGN OF CONCRETE STRUCTURES QUIZ

For concreting of heavily reinforced sections without vibration, the workability of concrete expressed as compacting factor should be

Above 0.92

0.75 - 0.80

0.75 - 0.80

0.85 - 0.92

TRUE ANSWER : ?
YOUR ANSWER : ?

In a counterfort retaining wall, the main reinforcement in the stem at mid span is provided on

None of these

inner face only

both front face and inner face

front face only

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Bulking of sand is maximum if moisture content is about

5%

7%

4%

6%

TRUE ANSWER : ?
YOUR ANSWER : ?

The percentage of voids in cement is approximately

40%

70%

60%

50%

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For a longitudinal reinforcing bar in a column, the minimum cover shall neither be less than the diameter of bar nor less than

40 mm

60 mm

45mm

50 mm

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

Not provided

Provided both on inner and front faces

Provided only on inner face

Provided only on front face

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Examine the following statements :<br/>i) Factor of safety for steel should be based on its yield stress,<br/>ii) Factor of safety for steel should be based on its ultimate stress,<br/>iii) Factor of safety for concrete should be based on its yield stress,<br/>iv) Factor of safety for concrete should be based on its ultimate stress.<br/>The correct statements are

(i) and (iv)

(ii) and (iv)

(i) and (iii)

(ii) and (iii)

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A continuous beam is deemed to be a deep beam when the ratio of effective span to overall depth (1/D) is less than

3.5

2.5

4.5

5.5

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Normally prestressing wires are arranged in the

anywhere

upper part of the beam

lower part of the beam

center

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The limits of percentage p of the longitudinal reinforce-ment in a column is given by

0.8% to 4%

0.15% to 2%

0.8% to 6%

0.8% to 8%

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