lượng hơi nước có lưu lượng 100kg/s ở áp suất p1=20bar nhiệt độ đầu t1=400. giãn nở đoạn nhiệt trong tuabin đến độ khô x2=0.95. Xác đinh áp suất cuối, thể tích cuối và công kĩ thuật của quá trình

The y form of iron is known as: a) ferrite b) cementite c) perlite d) austenite

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.

Water at 55c flows across a flat plate whose surface temperature is held constant at 95c. if the temperature gradient at the plate's surface for a given value of x is 18 c/mm, find a) local heat transfer coefficient. b) heat flux