Bleed-off is a method used to _____
a. correct the pH of a cooling water tower
b. winterize a cooling tower
c. add water to a cooling tower
d. control cooling tower scaling mineral concentration
d
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Organically grown food represents _____ percent of our food supply
A) not less than 9 B) nearly 15 C) about 4 D) more than 32
According to John Humphrey Noyes, founder of the utopian Oneida Community, the key to happiness is
A. acceptance of a sinful mankind. B. the suppression of selfishness. C. the abandonment of "free love" orcomplex marriages. D. liberal political reform. E. None of these choices are correct.
The standard frequency of alternating current in the United States is _____
a. 50Hz b. 60Hz c. 120Hz d. 360Hz
With the compressor off, a technician compares the pressure of an air-cooled condenser with the pressure given on the PT chart for that refrigerant and temperature. The system pressure is considerably higher than the pressure indicated on the PT chart for that refrigerant and temperature. This indicates that:
A) The system has been undercharged. B) The system has been slightly overcharged. C) The system has been properly evacuated and charged. D) The system has noncondensable gases in it.