The flow resistance through the heat exchanger of an oil furnace is frequently increased because of:
A) Internal collapse of the heat exchanger. B) Loose heat exchanger cross-baffle members.
C) Water accumulation. D) Soot accumulation.
D
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¿Qué es un economizador?
a. Una válvula de combustible b. Un mezclador de aire c. Un precalentador para agua de alimentación de calderas d. Un recalentador para vapor
Trades & Technology
It has been said that "the historian who searches for examples of intelligent and tolerant statesmanship in the period 1850-1854 seeks almost in vain." Citing the "statesmanship" of men like Clay, Douglas, Webster, Calhoun, Pierce, and Fillmore, demonstrate that this argument is or is not supportable.
What will be an ideal response?
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Inspecting ladders before every use may prevent a fall.