Engineering, 20.09.2019 22:00 bm42400
Athin electrical heater is wrapped around the outer surface of a long cylindrical tube whose inner surface is maintained at a temperature of 6°c. the tube wall has inner and outer radii of 24 and 78 mm, respectively, and a thermal conductivity of 10 w/m · k. the thermal contact resistance between the heater and the outer surface of the tube (per unit length of the tube) is r ′ t , c = 0.01 m ⋅ k / w . the outer surface of the heater is exposed to a fluid with t[infinity] = −10°c and a convection coefficient of h = 100 w/m2 · k. determine the heater power per unit length of tube required to maintain the heater at to = 25°c.
Answers: 3
Engineering, 03.07.2019 14:10
If the thermal strain developed in polyimide film during deposition is given as 0.0044. assume room temperature is kept at 17.3 c, and thermal coefficient of expansion for the film and the substrate are 54 x 10^-6c^-1 and 3.3 x 10^-6c^-1respectively. calculate the deposition temperature.
Answers: 3
Engineering, 04.07.2019 18:10
Adouble-strand no. 60 roller chain is used to transmit power between a 13-tooth driving sprocket rotating at 300 rev/min and a 52-tooth driven sprocket. a) what is the allowable horsepower of this drive? b) estimate the center-to-center distance if the chain length is 82 pitches. c) estimate the torque and bending force on the driving shaft by the chain if the actual horsepower transmitted is 30 percent less than the corrected (allowable) power.
Answers: 3
Engineering, 04.07.2019 18:10
Afull journal bearing has a journal diameter of 27 mm, with a unilateral tolerance of -0.028 mm. the bushing bore has a diameter of 27.028 mm and a unilateral tolerance of 0.04 mm. the l/d ratio is 0.5. the load is 1.3 kn and the journal runs at 1200 rev/min. if the average viscosity is 50 mpa-s, find the minimum film thickness, the power loss, and the side flow for the minimum clearance assembly.
Answers: 1
Engineering, 04.07.2019 18:10
Machinery that is a key part of the process and without which the plant or process cannot function is classifed as: (clo4) a)-critical machinery b)-essential machinery c)-general purpose machinery d)-none of the specified options.
Answers: 1
Athin electrical heater is wrapped around the outer surface of a long cylindrical tube whose inner s...
Mathematics, 22.01.2020 04:31
Mathematics, 22.01.2020 04:31
Social Studies, 22.01.2020 04:31
Biology, 22.01.2020 04:31
Mathematics, 22.01.2020 04:31
Physics, 22.01.2020 04:31
Chemistry, 22.01.2020 04:31
Biology, 22.01.2020 04:31
Biology, 22.01.2020 04:31
Arts, 22.01.2020 04:31
History, 22.01.2020 04:31
Mathematics, 22.01.2020 04:31