Improper type of oil or lack of lubrication system maintenance can cause damage to a displacement on demand system.
Answer the following statement true (T) or false (F)
True
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The primary purpose of a valve is.
a. Direct the flow of fluid. b. Block in and isolate equipment. c. Stop the flow of fluid. d. Start the flow of fluid.
Shears work like powerful ____.
A. tweezers B. saws C. knives D. scissors
Histograms or frequency plots
a. are graphical tools used to understand variability. b. are constructed with a block of data separated into five to twelve bars or sections from low number to high number. c. have a vertical axis that is the frequency and the horizontal axis is the scale of characteristics. d. are finished charts that resemble a bell if the data is in control. e. all the above
Mark these statements as being True or False for a binary mixture of substances A and B.
_____(a) The density of a mixture is always equal to the sum of the densities of its constituents. _____(b) The ratio of the density of component A to the density of component B is equal to the mass fraction of component A. _____(c) If the mass fraction of component A is greater than 0.5, then at least half of the moles of the mixture are component A. _____(d) If the molar masses of A and B are equal to each other, then the mass fraction of A will be equal to the mole fraction of A. _____(e) If the mass fractions of A and B are both 0.5, then the molar mass of the mixture is simply the arithmetic average of the molar masses of A and B.