A micron gauge is used to measure ____.

A. atmospheric pressures at high altitudes
B. atmospheric pressures at sea level
C. absolute pressures below 1 mm Hg
D. high pressure in a refrigeration system


Answer: C

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____ are used to help seat tire beads and to carry out sheet metal work.

a. Rubber hammers b. Screwdrivers c. Steel hammers d. Pliers

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About what percentage of American households have at least one companion animal?

a. 10 percent c. 50 percent b. 80 percent d. 60 percent

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There are generally three types of positive displacement pumps that are in use today: the vane pump, the ____ pump, and the piston pump.

A. centrifugal B. impeller C. gear D. radial axis

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A discrete-time signal x [n] with fundamental period N0 = 4 has a DFT X[k] .


(a) Find X[?5] .

(b) Find X[22] .

(c) Find x[0] .

(d) Find x[3] .

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