Which of the following factors affect the cooling tower performance?
A. Humidity
B. Wind speed
C. Wind direction
D. All of the above
A. Incorrect. Humidity, wind speed, and wind direction all affect the cooling tower performance.
B. Incorrect. Humidity, wind speed, and wind direction all affect the cooling tower performance.
C. Incorrect. Humidity, wind speed, and wind direction all affect the cooling tower performance.
D. Correct. Humidity, wind speed, and wind direction all affect the cooling tower performance.
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Answer the following statement(s) true (T) or false (F)
1. Ladder logic is a good choice for a programming language because it closely resembles the way circuits are hard-wired. 2. The EXAMINE OFF instruction is only logically true when the device referenced is ON, or open. 3. When the N.C. symbol is programmed in a ladder diagram, any address that is actually ON becomes logically true and power can flow. 4. The number of times an input device can be addressed and used in a programmed circuit is limited to eight. 5. There are many more applications and circuits that normally require two- or three-pole devices that now only require single-pole devices when programmed for a PLC.
_____ is the largest heron in North America
a. Little blue heron b. Snow heron c. Cattle heron d. Great blue heron
The accompanying figure illustrates ____ forging.
A. machined B. stamped C. drop D. hot
A TRIAC is equivalent to two SCRs connected in ____________________, back to back.
Fill in the blank(s) with the appropriate word(s).