Answer the following questions for a simple gear pair of two spur gears (hob cut) with pitch diameters of 2.5" and 5". use a pressure angle of 25o and coarse pitch. the largest standard tooth size, in terms of diametral pitch, is answer teeth/inch. the minimum number of teeth for the pinion is answer teeth. the minimum number of teeth for the gear is answer teeth.

Acompressor receives the shaft work to decrease the pressure of the fluid. a)- true b)- false

An ideal otto cycle with air as the working fluid has a compression ratio of 8. the minimum and maximum temperatures in the cycle are 300 k and 1340 k. use constant specific heats at room temperature to determine (a) the amount of heat transferred to the air during the heat- addition kj/kg, (b) the thermal efficiency, and (c) the thermal efficiency of a carnot cycle ope limits. process, in rating between the same temperature

Water vapor initially at 10 bar and 400 °c is contained within a piston-cylinder assembly. the water lost heat to the surrounding according to isochoric (iso-volumetric) process until its temperature is 150 °c. the water is then condensed isothermally to saturated liquid. for the water as a system, calculate the work in kj/kg