How can water-tubing fouling be prevented in tube-and-shell water-cooled condenser systems?
A) Through annual draining and replacement of the water in the condenser and annual chemical treatment of the water
B) Through a monthly external scrubbing with bleach
C) Through annual chemical treatment of the water
D) Through annual draining of the water, removing access plates, and running brushes through the water tubes
D
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Vertical slipforming is used primarily for structures with a height greater than _____.
a. 100 feet b. 80 feet c. 50 feet d. 40 feet
The results of a compaction test on samples of soil that are to be used for an embankment on a highway project are listed below. Determine the maximum dry unit weight of compaction and the optimum moisture content.
What will be an ideal response?
The strength of the magnetic field is ____ the number of turns in the coil and the amount of current flowing through it.
A. double B. half C. directly proportional to D. inversely proportional to
If the field coil of a shunt DC motor opens, the speed of the shaft will __________.
A. slow down B. speed up C. stay the same