3.6/ A landing gear system has repetitive stresses placed on it twice a day as a result of landings. The probability of a failure during landing is 0.0028. Determine the reli- ability of the landing gear system over a 30-day contingency operation. What is the probability of a failure occurring between days 10 and 20 of the operation?

QUESTION 1 A suitable factor of safety to apply when selecting the cable for a factory hoist is: 05 O1.2 0.2 O 25 QUESTION 2 A winch drum of diameter 199mm turning at 14rpm lifts a load of 5.5kN. What is the winch output power? Give your answer in W to 1 decimal place without units eg 102.3 NOT 102345239 W QUESTION 3 The figure below shows two proposed designs of drums to solve the same load and line speed lifting arrangement. What is the biggest advantage with design A: A The torque on the drum shaft will be lower O The rope speed will be lower The bending moment in the drum shaft will be lower O The weight of the drum material will be less 刚 B

Calculation of Limits using ANSI B4.1 Standard Tables, when one of the design Features Exists. When calculating the limit tolerances for features that mate with purchased parts, the purchased part size must be known. This may be obtained be requesting a drawing from a vendor or, a caliper or micrometer can be used to obtain an accurate size. A shaft diameter of 1.2500" is to be pressed into a part using a FN3 interference (force) fit. Limits of size for the shaft diameter are 1.2500" and 1.2495". Determine the Limits of the hole diameter. Show all work.

A ball bearing, rotating at 1200 revolutions per minute, operates at a radial equivalent load of 29% of its dynamic load rating. What is the expected lifetime in hours at a reliability level of 90%? Please round your answer to the nearest hour. Type your answer...