Problem 1. Select a proper key from the table below. The shaft has a diameter of 45 mm and transfers a torque of 189,5 Nm. The hub has length of 57 mm. The key is made from steel with σ = 235 MPa, the shaft is made from steel with σy = 355 MPa, and the hub is made from steel with σy = 275 MPa. The safety factor is 1,5. Shaft d On IP1 and бдс 1016- 87 b h Key 1, h14 s or r over till h9 10 12 4 12 17 5 17 22 6 22 30 8 30 38 10 145670 h11 from to from to 8 45 0,16 0,25 10 56 14 70 0,25 0,4 8 38 44 12 44 50 14 50 58 16 10 58 65 18 11 65 75 20 12 75 85 22 14 90724 112234 18 90 22 110 28 140 36 160 0,4 0,6 45 180 50 200 56 220 63 250 0,6 0,8 85 95 25 70 280 95 110 28 16 80 320

Select a proper key from the table below. The shaft has a diameter of 70mm and transfers a torque of 350 Nm. The hub has length of 55 mm. The key is madefrom steel with σy = 235 MPa, the shaft is made from steel with σy = 355 MPa, andthe hub is made from steel with σy = 275 MPa. The safety factor is 2,5.

A steel shaft of 2.5 inch diameter rotates at 500 rev/min and transmits 120 hp through a gear. Select an appropriate square key for the gear, while the key material having yield strength of 60 kpsi. Assume a factor of safety of 2.0.. Draw sketch and show all calculations.

Description Plot Equation (1-4) as a graph (es vs T) for a range of temperatures from -305C to 405C and a range of pressures from 0 to 70 mb. The area below the curve represents the unsaturated air condition. Using this graph, answer the following: (a) Select two saturated and two unsaturated samples of air from the dataset of pressure and temperature given below: Pressure (m b): {10, 20, 30} Temperature (5C): {10, 20, 30} (b) Let A and B be two air samples, where A: (T = 30! C, P = 20 m b) and B: (T = 30! C, P = 40 m b). For each sample, determine the following: (i) Saturation vapor pressure (ii) Dew point (iii) Relative humidity (C) Suppose both samples A and B were cooled to 20! C. What would be their relative humidity? What would be their dew point temperature? Equation (1-4)