The sequence of starting up, operating, and shutting down microprocessor-controlled centrifugal chillers and screw chillers _____.
a. requires a great deal of manual control
b. is very different for the two types
c. requires that the refrigerant charge be removed and replaced
d. is highly automated and similar
d. is highly automated and similar
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Which of the following is true with regard to steel erection?
a. Respirators are never needed when welding. b. A hot work permit may be required when welding. c. Welding epoxy-coated surfaces is safer than welding bare metal. d. Eye protection is not necessary when wearing a welding helmet
Crowns are usually built during the construction of the _____.
a. trenches b. runoff barriers c. subgrade d. final bedding
Maximum voltage is generated by rotating wire when the conductor is moving _____.
a. across the field at 90° b. with the field at 0° and 180° c. across the field at a 45° angle d. against the field at 180
Just as development of automobiles negated the need for buggy makers, the use of computers has changed the staffing needs of businesses
Indicate whether the statement is true or false