problem#1-c Circle the correct answer: 1- In beams the maximum clear distance be

Question

problem#1-c
Circle the correct answer:
1- In beams the maximum clear distance between reinforcing bars is:
a)one inch.
b)one inch or the bar diameter whichever is larger.
c)no special value
d)two bar diameter.
2- The primary reason for not desiging rienforced concrete buildings using very strong concrete (above 6,000 psi) is:
a) very expensive.
b) very difficult to make suh concrete.
c) ductility is reduced as the strength increases.
d) modulus of elasticity increases as the strength increases.
3-The reason doubly rienforced beams are used instead of singly rienforced beam is mainly to obtain a:
a) lower creep, shrinkage, and deflection properties.
b) smaller cross-section .
c) higer strength capability .
d) all of the above.
4- T-beams are most common in long spans since they are better than rectangular beams as they have:
a) larger effective depth d.
b) larger area of compression concrete.
c) larger area of tension steel.
d) more economical.
5- The Witney rectangular stress represent an:
a) Actual compression stress of concrete.
b) Approximate, close to the actual stress values.
c) Approximate, similar total load and center of action of the load

Explanation / Answer

1) b 2) a 3) d 4) b 5) a

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