10. The value of coefficient of friction expected in case of brake lining of steel wheel drum is
A. 0.4 to 0.5
B. 0.8 to 0.95
C. 0.1 to 0.3
D. 0.1
10. The value of coefficient of friction expected in case of brake lining of steel wheel drum is
A. 0.4 to 0.5
B. 0.8 to 0.95
C. 0.1 to 0.3
D. 0.1