Why must air tanks be drained

Refrigerant-134a is throttled from the saturated liquid state at 800 kPa to a pressure of 140 kPa. Determine the temperature drop during this process and the final specific volume of the refrigerant.

Which of the following statements is true about alcoholism A. Dependency on alcohol leads to alcoholism B. Alcohol dependency can be psychological only C. Alcohol dependency can be physical only D. Teens cannot become alcoholics

An exercise room has six weight-lifting machines that have no motors and seven treadmills, each equipped with a 2.5-hp (shaft output) motor. The motors operate at an average load factor of 0.7, at which their efficiency is 0.77.

Your uncle has given you a newmonitor for your computer. When you attempt to connect it, you notice that none of the ports on the back of your computer is able to accept the connector at the end of the monitor's cable. What are your next steps?

Which of the following is not an oxidizer? a) - H2O2 b) - CH c) - N2O4 d) - LO2

given two continuous time signals x (t) and h (t), if their convultion is denoted by y (t), then the convultion of x (t-1) and h (t+1) is

Old cars used to have a purely mechanical device called a carburetor to draw fuel into the engine for combustion. (Modern cars accomplish this with electronic fuel injection systems.

A gardener is using a 60N wheelbrow to carry 250Nb bag. The force exerted to each handle by gardener is 42 N, The force and the moment at the wheels are respectivelty: a. Fy=-226 N, M=25 N. m b. Fy=84 N, M=0 c. FX=100 N, M = 226 N. m d.

A painting crew reported that a job is 35 completed. What fraction of the job remains to be done?

Regulation 433.3.3 gives six examples where th are permitted for safety reasons. Can you fill in the missing words? Exciter Drop zone for rotating machines. Supply circuits of lifting Dron zone