In which type of system is the formation of scale normally not a problem?
a. Open recirculating
b. Closed chilled-water
c. Steam boiler
d. Cooling tower
b. Closed chilled-water
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A 3.5 ton heat pump system is used for a ?2,149.7 sq. ft. house. What is the ratio of sq. ft. to ton of heat pump?
Fill in the blank(s) with the appropriate word(s).
An almost square style letter known as ____ lettering is very widely used because it is legible and the individual letters are simple enough to be made quickly and accurately.
A. Gothic B. Greek C. Latin D. Roman
The memory operation which presents data on the memory outputs after entering a new address is called
A) a write cycle. B) a read cycle. C) a refresh cycle. D) chip select.
If a duty cycle includes significant plugging or jogging, select an _____.
a. AC-1 rated motor control device b. AC-2 rated motor control device c. AC-3 rated motor control device d. AC-4 rated motor control device