1. Problem 50% A flanged bolt coupling consist of six 10 mm. diameter steel bolts on a bolt circle 300 mm. in diameter, and four 10 mm. steel bolts on a bolt concentric bolt circle of 200 mm. in...

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Extracted text: 1. Problem 50% A flanged bolt coupling consist of six 10 mm. diameter steel bolts on a bolt circle 300 mm. in diameter, and four 10 mm. steel bolts on a bolt concentric bolt circle of 200 mm. in diameter. (a) Determine the torque applied (N-m) if the shearing stress is 60MPA in the bolts. (b) If the torque capacity increased to 8 kN-m, determine the number of bolts of 10 mm. diameter on the 300 mm. bolt circle of the coupling. 2. Problem 50% A solid shaft 100 mm. in diameter is to be replaced with a hollow shaft equally strong and made of the same material. The outside diameter of the hollow shaft is 127 mm. The allowable shearing stress is 41.40 MPa. Determine; (a) the inside diameter (mm.) of the hollow shaft. (b) the thickness (mm.) of the hollow shaft.