A. 5 cm
B. 10 cm
C. 15 cm
D. 20 cm
Related Mcqs:
- If the maximum dip of a parabolic tendon carrying tension P is h and the effective length of the pre-stressed beam is L, the upward uniform pressure will be________________?
A. 8hp/ l
B. 8hp/l²
C. 8hl/p
D. 8hl/p² - A pre-stressed rectangular beam which carries two concentrated loads W at L/3 from either end, is provided with a bent tendon with tension P such that central one-third portion of the tendon remains parallel to the longitudinal axis, the maximum dip h is_____________________?
A. WL/P
B. WL/2P
C. WL/3P
D. WL/4P - is the pre- stressed force applied to tendon of a rectangular pre-stressed beam whose area of cross section is and sectional modulus is . The minimum stress on the beam subjected to a maximum bending moment 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) - is the pre-stressed force applied to the tendon of a rectangular pre-stressed beam whose area of cross section is and sectional modulus is . The maximum stress in the beam, subjected to a maximum bending moment , 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) - In a pre-stressed beam carrying an external load W with a bent tendon is having angle of -stressed load P. The net downward load at the centre is_________________?
A. W – 2P
B. W – P
C. W – P
D. W – 2P - If is the sectional area of a pre-stressed rectangular beam provided with a tendon pre -stressed by a force through its centroidal longitudinal axis, the compressive stress in concrete, is_______________?
A. P/A
B. A/P
C. P/2A
D. 2A/P - If the loading on a pre-stressed rectangular beam, is uniformly distributed, the tendon to be provided should be_______________?
A. Straight below centroidal axis
B. Parabolic with convexity downward
C. Parabolic with convexity upward
D. Straight above centroidal axis - If a bent tendon is required to balance a concentrated load W at the centre of the span L, the central dip h must be at least________________?
A. WL /P
B. WL/2P
C. WL/3P
D. WL/4P - If K is a constant depending upon the ratio of the width of the slab to its effective span l, x is the distance of the concentrated load from the nearer support, bw is the width of the area of contact of the concentrated load measured parallel to the supported edge, the effective width of the slab be is_______________?
A. K/x (1 + x/d) + bw
B. Kx (1 – x/l) + bw
C. Kx (1 + x/l) + bw
D. All the above - For the design of a simply supported T-beam the ratio of the effective span to the overall depth of the beam is limited to______________?
A. 10
B. 15
C. 25
D. 20
