Only two substances should be in the refrigeration system for proper operation. They are ____________________ and oil.
Fill in the blank(s) with the appropriate word(s).
refrigerant
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A penstock supply pipe has straight segments of 8 ft. 4 in., 15 ft. 7 in., 23 ft. 5 in., and 16 ft. 9 in. The total length of straight pipe needed for this penstock is:?
A. ?62 ft. B. ?63 ft. C. ?63 ft. 9 in. D. ?64 ft. 1 in.
Which of the following is a similarity between FCAW and GMAW?
A. Both use CC welding power supplies. B. Both use CP welding power supplies. C. Both use the same welding power supply as stick welding. D. Both must use constant welding current power supplies.
Animal digestive and detoxification abilities:
A) are heritable characteristics. B) vary among individual animals. C) can be improved by use of pharmaceutical products to aid digestion. D) None of the above E) All of the above
What is an advantage of a crossflow tower?
A) A cross flow tower can be configured for a lower height. B) Cross flow cooling towers can employ ECM blower motors. C) Cross flow cooling towers have variable-pitch air inlet vanes to provide more efficient airflow through the tower. D) The discharge air can be ducted into conditioned space in the winter to provide free heat and humidification.