#### R C C Structures Design

1

The weight of reinforced concrete, is generally taken as

A. 2200 kg/m^3
B. 2300 kg/m^3
C. 2400 kg/m^3
D. 2500 kg/m^3
E. 2800 kg/m^3

2

If the bearing capacity of soil is 10 tonnes/cm2 and the projection of plain concrete footing from walls, is a cm, the depth D of footing is

A. D = 0.0775 a
B. D = 0.775 a
C. D = 0.775sqrt(a)
D.  D = 0.775 a^2

3

If T and R are the tread and rise of a stair which carries a load w per square metre on slope, the corresponding load per square metre of the horizontal area, is

A. (W(R + T))/(T)
B. (Wsqrt(R^2 + T^2))/(T)
C. (Wsqrt((R + T)))/(T)
D. (WR)/(T)
E. W - T/R

4

P is the prestressed force applied to tendon of a rectangular prestressed beam whose area of cross section is A and sectional modulus is Z. The minimum stress f on the beam subjected to a maximum bending moment M is

A. f = P/A - Z/M
B. f = A/P - M/Z
C. f = P/A - M/Z
D. f = P/A - (M)/(6Z)
E. f = P/A - (M)/(3Z)

5

If L is the effective span of a R.C.C. beam which is subjected to maximum shear q_(max)      at the ends, the distance from either end over which stirrups for the shear, are provided, is

A. L/2(1 - 3/q_(max))
B. L/3(1 - 5/q_(max))
C. L/2(1 - 5/q_(max))
D. L/2(1 - 2/q_(max))