Q1) An engineer is considering the 4 machines below for laboratory railway track testing. Using present worth analysis, which machine should be selected? MARR is 8% per year.
Estimates Machine A Machine B Machine C Machine D
Initial cost, $ -144,000 -130,000 -155,000 -94,000
AOC, $/year -10,000 -11,100 -15,000 -1,000
Salvage value, $ 2,500 0 5,000 4,400
Life, years 3 6 3 6

Which of the following refers to refers to how well the control system responds to sudden changes in the system. a)-transient regulation b)- distributed regulation c)-constant regulation d)-steady-state regulation

Which of the following controllers anticipates the future from the slope of errors over time? a)-proportional b)-on/off c)-integral d)-derivative.

Atank with constant volume contains 2.27 kg of a mixture of water phases (liquid-vapor). in the initial state the temperature and the quality are 127 °c and 0.6, respectively. the mixture is heated until the temperature of 160 oc is reached. illustrate the process in a t-v diagram. then, determine (1) the mass of the vapor in kg at the initial state, (2) the final pressure in kpa.