A pre-stressed concrete member is preferred because___________________?

The load stress of a section can be reduced by______________?

A. Decreasing the lever arm

B. Increasing the total perimeter of bars

C. Replacing larger bars by greater number of small bars

D. Replacing smaller bars by greater number of greater bars

The maximum ratio of span to depth of a slab simply supported and spanning in one direction, is______________?

A. 35

B. 25

C. 30

D. 20

the column head support a flat slab, is generally kept The diameter of_____________?

A. 0.25 times the span length

B. 0.25 times the diameter of the column

C. 4.0 cm larger than the diameter of the column

D. 5.0 cm larger than the diameter of the column

The floor slab of a building is supported on reinforced cement floor beams. The ratio of the end and intermediate spans is kept______________?

A. 0.7

B. 0.8

C. 0.9

D. 0.6

In case the factor of safety against sliding is less than 1.5, a portion of slab is constructed downwards at the end of the heel slab, which is known as___________________?

A. A key

B. A cut-off wall

C. A rib

D. All the above