Plz answer, I will give brainliest if correct! A certain lever has a mechanical advantage of 3. What class(es) of lever could it be?

A. Third-class only
B. First-class or third-class
C. Second-class or third-class
D. First-class or second-class

Water at 70°f and streams enter the mixing chamber at the same mass flow rate, determine the temperature and the quality of the exiting stream. 0 psia is heated in a chamber by mixing it with saturated water vapor at 20 psia. if both streams enters the mixing chamber at the same mass flow rate, determine the temperature and the quality of the existing system.

Give heat transfer applications for the following, (i) gas turbines (propulsion) ) gas turbines (power generation). (iii) steam turbines. (iv) combined heat and power (chp). (v) automotive engines

The higher the astm grain-size number, the coarser the grain is. a)-true b)-false