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engineering
mechanical engineering
january 2020
05

Mechanical Engineering Questions and Answers January 05, 2020

Expert-verified solutions to help you succeed

A square-thread power screw has a major diameter of 32 mm and a pitch of 4 mm with double threads. The given data for the power screw include, f=0.07, dc=40mm, and F=8.4kN per screw. 1. Find the thread depth, thread width, pitch diameter, minor diameter, and lead. 2. Find the torque required to raise and lower the load. 3. Find the body stresses,

Water ( C p = 1.0 Btu/lbm F) is to be heated by solar-heated hot air ( C p = 0.24 Btu/lbm F) in a double-pipe counter-flow heat exchanger. Air enters the heat exchanger at 190F at a rate of 0.7 lbm/s and leaves at 135F. Water enters at 70F at a rate of 0.35 lbm/s. The overall heat transfer coefficient based on the inner side of the tube is given

What is the heat capacity rate? What can you say about the temperature changes of the hot and cold fluids in a heat exchanger if both fluids have the same capacity rate? What does a heat capacity of infinity for a fluid in a heat exchanger mean?

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