Consider a simple Brayton/gas cycle using air as the working fluid; has a pressure ratio of 12; has a maximum cycle temperature of 600 degrees C; and operates the compressor inlet at 90 kPa and 15 degrees C. Compressor and turbine isentropic efficiency is 90 percent. Use Cp as 1.005 kJ/kg. K. Find net work done by this cycle, ignoring heat addition. Write your answer below.

Which of the following is an easy way to remember the modified “x” tire rotation? a. nondrive wheels straight, cross the drive wheels b. drive wheels straight, cross the nondrive wheels c. drive wheels crossed, nondrive wheels straight d. drive wheels crossed, nondrive wheels crossed

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

Aquick transition of the operating speed of a shaft from its critical speed will whirl amplitude. (a) increase (b) limit (c) not affect (d) zero