2. (a) Calculate the actual temperature of exhaust gas from a diesel engine if the measuring thermocouple reads 500oC and the exhaust pipe is 350oC. The emissivity of thermocouple is 0.7 and the convective heat transfer coefficient of the flow over thermocouple is 200 w/m2-oC. (b) Assume a shield is used to reduce the error. If the shield temperature is about 460oC, calculate the error in output temperature. (Problem 9.39 and 9.41on page 335)

Ajournal bearing has a journal diameter of 3.250 in with a unilateral tolerance of 20.003 in. the bushing bore has a diameter of 3.256 in and a unilateral tolerance of 0.004 in. the bushing is 2.8 in long and supports a 700-lbf load. the journal speed is 900 rev/min. find the minimum oil film thickness and the maximum film pressure for both sae 20 and sae 20w-30 lubricants, for the tightest assembly if the operating film temperature is 160°f. a computer code is appropriate for solving this problem.