engineering recuitment BEL Probationary Engineers Mock Test 2025 Design of Machine Elements Shafts Keys and Couplings Coupling
In an unprotected type of flange coupling, the outer diameter of the hub is ______.
1
1.5 times the diameter of the inner hub
2
3 tomes the diameter of the inner hub
3
1.75 times the diameter of the inner hub
4
twice the diameter of the inner hub