What do we call the naturally occurring mixture of hydrocarbon gasses buried deep within the earth?
What will be an ideal response?
Natural gas.
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Name the primary difference between a pump and a compressor.
a. Compressors use steam turbines vs. electric motors b. Pumps transfer fluids, compressors transfer gases. c. Pumps are smaller than compressors. d. Compressors transfer gases, pumps transfer liquids.
The tendons used for prestressing a PT concrete slab-on-ground generally consist of
A) two-strand tendons, each strand made of seven wires. B) a single 1/2-in.-diameter, seven-wire strand. C) a single 1/2-in.-diameter, nine-wire strand. D) three -strand tendons, each strand made of seven wires. E) none of the above.
The measured inductance of a power line 110 kilometers long is found to be 295 millihenery. What is the inductance of the line per kilometer? Express the answer to the nearer hundredth millihenery.
Fill in the blank(s) with the appropriate word(s).
When the DC excitation increases to cause an over-excited synchronous motor, a __________ is developed.
A. lagging power factor B. leading power factor C. unity power factor D. none of the above