Controlling algae or slime in open recirculating systems involves using chemical treatments and _____
a. cleaning the equipment thoroughly at regular intervals
b. injecting scavenger microorganisms into the makeup water
c. keeping the temperature of the water in the sump below 60°F
d. restricting the air current path to the cooling tower periodically
a
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The voltage needed to produce 1.5 amps of current in a 75 ? resistor is:?
A. ?0.0089 V B. ?0.02 V C. ?50 V D. ?112.5 V
Two-way joist slabs are commonly known as _____.
a. cross-rib slabs b. waffle slabs c. ribbed slabs d. indented slabs
It is taking more and more people to produce the agriculture commodities that the nation's population requires than in the past
Indicate whether the statement is true or false
What is the principle cause of battery water loss?
A. Spillage from the vent caps B. Leakage through the battery case C. Conversion of water to sulfuric acid D. Evaporation due to heat of the charging current