engineering recuitment NCL Assistant Foreman (Trainee) Mock Test 2024 Design of Machine Elements Belt Drive
What is the velocity ratio for creep in the belt drive system with σ1 being the stress on the tight side, σ2 being the stress on the slack side and E is Young’s modulus of elasticity of the belt material?
1
\(\frac{{{N_2}}}{{{N_1}}} = \frac{{{d_1}}}{{{d_2}}} \times \frac{{E - \sqrt {{\sigma _2}} }}{{E - \sqrt {{\sigma _1}} }}\)
2
\(\frac{{{N_2}}}{{{N_1}}} = \frac{{{d_1}}}{{{d_2}}} \times \frac{{E + \sqrt {{\sigma _2}} }}{{E - \sqrt {{\sigma _1}} }}\)
3
\(\frac{{{N_2}}}{{{N_1}}} = \frac{{{d_1}}}{{{d_2}}} \times \frac{{E + \sqrt {{\sigma _2}} }}{{E + \sqrt {{\sigma _1}} }}\)
4
\(\frac{{{N_2}}}{{{N_1}}} = \frac{{{d_1}}}{{{d_2}}} \times \frac{{E - \sqrt {{\sigma _2}} }}{{E + \sqrt {{\sigma _1}} }}\)