Engineering, 04.05.2021 01:10 aidenmanpig
Question 4
A steel rod of 20 mm diameter passes centrally through a copper tube of 50 mm external diameter
and 40 mm internal diameter. The tube is closed at each end by rigid plates of negligible thickness.
The nuts are tightened lightly home on the projecting parts of the rod. If the temperature of the
assembly is raised by 50°C, calculate the stresses developed in copper and steel. Take E for steel
and copper as 200 GN/m² and 100 GN/m² and α for steel and copper as 12x 10-6
per °C and 18 x
10-6
per °C
Answers: 3
Engineering, 03.07.2019 14:10, bryneosburn
Line joining liquid phase with liquid and solid phase mixture is known as: a) liquidus b) solidus c) tie line d) none of the mentioned
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Engineering, 04.07.2019 18:10, sarahgrindstaff123
Afluid flows with a velocity field given by v=(x/t)i.. determine the local and convective accelerations when x=3 and t=1.
Answers: 2
Engineering, 04.07.2019 18:10, DestyHilBan1183
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, lowkeyqueenk
Apipe with an outside diameter of 15 cm is exposed to an ambient air and surrounding temperature of -20°c. the pipe has an outer surface temperature of 65°c and an emissivity of 0.85. if the rate of heat loss from the pipe surface is 0.95 kw per meter of length, the external convective heat transfer coefficient (h) is: (a) 12.5 w/m"k (b) 18.6 w/mk (c) 23.7 w/mk (d) 27.9 w/mk (e) 33.5 w/mk
Answers: 1
Question 4
A steel rod of 20 mm diameter passes centrally through a copper tube of 50 mm external...
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