A cast steel pinion (0o = 120MNm-2, 2) rotating at 315 rpm drives a cast steel gear of a different grade (0o = 135 MNm-2
2) at a velocity ratio
of 3.0 to 1. The pinion has 24 teeth, a module of 6 mm and the pressure angle is 200.

Given all the previous calculations, is the dynamic load less
than the allowable endurance load?

True
Or
False

Two flowing streams of argon gas are adiabatically mixed to form a single flow/stream. one stream is 1.5 kg/s at 400 kpa and 200 c while the second stream is 2kg/s at 500 kpa and 100 ? . it is stated that the exit state of the mixed single flow of argon gas is 150 c and 300 kpa. assuming there is no work output or input during the mixing process, does this process violate either the first or the second law or both? explain and state all your assumptions.

The temperature of air decreases as it is compressed by an adiabatic compressor. a)- true b)- false

During a steady flow process, the change of energy with respect to time is zero. a)- true b)- false