What type of flame is produced when about 50 percent of the required combustion air is mixed with natural
gas prior to ignition?
a. A cool flame
b. A yellow flame
c. A hard flame
d. A blue flame
d
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The examination symbol consists of two parts: an arrow and tail.
Answer the following statement true (T) or false (F)
If a roof has an area of 3,000 square feet and a designed water depth of 6 inches, the number of gallons of water it can hold is _____.
a. 9,550 b. 10,700 c. 11,250 d. 14,875
American membership in the North Atlantic Treaty Organization did all of the following for the country EXCEPT
A. strengthen the containment of the Soviet Union. B. help reintegrate Germany into the European family. C. reduce our defense expenditures, since we would get help from other countries. D. reassure Europeans that the United States would not abandon them. E. strike a major blow to American isolationists.
Rotary compressors are commonly used in:
A) Commercial refrigeration systems. B) Chillers. C) Window units. D) Large central split systems.