Consider a series structure with n independent components. each one has a time to failure which is weibull distributed with similar shape parameter a and different scale parameter λi, (i=1, n). find the reliability function of the system based on α and λ.

During a steady flow process, the change of energy with respect to time is zero. a)- true b)- false

Aquick transition of the operating speed of a shaft from its critical speed will whirl amplitude. (a) increase (b) limit (c) not affect (d) zero

Find the minimum film thickness for a journal bearing with the data below. shaft diameter, d-50 mm, clearance ratio, cdratio? 0.001, shaft speed, n 2000 rpm; bearing length. i 200 mm; eccentricity ration, ? -0.55. ( note, cdratio-ca/d) the minimum film thickness is um