Classify the systems as linear or nonlinear systems, and time-varying or time-invariant systems, where x(t) and y(t) represent the input and output, respectively: [a] y(t) = 0.2x(t - 1) [b] y(t) = tx(t) [c] y(t) = x(t) + t [d] y(t) = x(t) + 1 [e] y(t) = x(t) cos (t)

Shafts are machine elements that are used to a) carry axial loads b) direct shear loads c) transmit power d) rotate at constant speed e) none of the above circular and square shafts subjected to the same torque under the same circum behave a) the same way b) almost the same way

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

Inspection for bearing condition will include: (clo4) a)-color b)-smell c)-size d)-none of the above