Water with a pH much lower than 7.0 is ____ and can produce corrosive effects on metal equipment and pipes
A) acidic
B) alkaline
C) neutral
D) flavored
A
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Most of the power for operating agricultural machinery is supplied by ____________________
Fill in the blank(s) with the appropriate word(s).
It is possible for zinc crystals to undergo very large plastic strains at temperatures below room temperature. This is not true in polycrystalline zinc, which normally shows a very low ductility at sub?ambient temperatures. Give an explanation for this face based on the mechanical properties of zinc.
What will be an ideal response?
Answer the following statement(s) true (T) or false (F)
A PEM fuel cell needs to operate at very high temperatures.
In a water-cooled condenser, what do an increase in head pressure and a decrease in temperature difference across the condenser indicate?
A) Low-pH water B) Low water flow C) Scaling on tubing D) Undersized condenser