While discussing brake fluids, Technician A says hygroscopic brake fluid absorbs moisture from the air. Technician B says DOT 3 brake fluid has a higher boiling point than DOT 4 fluid. Who is correct?

A. A only
B. B only
C. both A and B
D. neither A nor B


Answer: A

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If the overall mixture is 20% by mole R-245fa, will the mixture exist in one phase or multiple phases in equilibrium at 240 K and 0.1 bar according to the model? If the mixture does exist in multiple phases, what is the composition of the equilibrium phases?

Consider a model that predicts the behavior of the R-245fa (1) + isopentane (2) system at two pressures shown in the figure.

A. 1 liquid phase
B. 1 liquid phase (x1 = 0.03) and 1 vapor phase (y1 = 0.37)
C. 2 liquid phases (x1? = 0.22; x1? = 0.92) and 1 vapor phase (y1 = 0.64)
D. 2 liquid phases (x1? = 0.22; x1? = 0.92)
E. 2 vapor phases

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Much of what we eat or wear today is the result of Neolithic domestication of animals and plants in:

a. Northern Asia c. Central America b. the Fertile Crescent d. Australia

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____ is defined as the underground conductors between the utility electric supply system and the service point.

A. Service lateral B. Primary branch C. Ancillary service D. Connection branch

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Describe how Deming's plan-do-check-act cycle might be applied in improving a construction company's procedures for scheduling subcontractors' work on a construction project

What will be an ideal response?

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