Consider the following statements regarding use of mechanical vibrator : 1. It can be used for small as well as large volumes of concrete. 2. The mix can have high value of slump. 3. Density of concrete can be high. The advantages of a mechanical vibrator include :
Two long columns C1 and C2 are made of the same materials. Column C1 has both the ends hinged while column C2 has one end hinged and other end fixed. What is the ratio of the critical load for C1 to that of C2 according to the Euler's formula ?