engineering recuitment ISRO Scientist Mechanical Mock Test Design of Machine Elements Brakes Types of Brakes
In a band and block brake, the ratio of tensions on tight side and slack side of the band is ________.
(where μ = coefficient of friction between the block and drum, θ = Semi-angle of each block subtending at the centre of drum and n = Number of blocks.)
1
\(\frac{{{T_2}}}{{{T_1}}} = {\left[ {\frac{{(1 + \mu \tan \theta )}}{{(1 - \mu \tan \theta )}}} \right]^n}\)
2
\(\frac{{{T_2}}}{{{T_1}}} = \mu .\theta .n\)
3
\(\frac{{{T_1}}}{{{T_2}}} = {\left[ {\frac{{(1 + \mu \tan \theta )}}{{(1 - \mu \tan \theta )}}} \right]^n}\)
4
\(\frac{{{T_2}}}{{{T_1}}} = {\left[ {\frac{{(1 + \mu \tan \theta )}}{{(1 - \mu \tan \theta )}}} \right]^{1/n}}\)