Practice questions on April 2, 2017; replies will earn 2–6 points (**no scoring after it is displayed, thank you for your replies)

2017-04-02View Original

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Multiple-choice question: Among the following options, (　B　) will cause smoke to emanate from the chimney and an excessively high furnace temperature. A. Drop in fuel gas pressure B. Gas carrying oil C. Steam carrying water D. Fuel oil carrying water

Reply #22017-04-02

Among the following options, (　Candlelight tears; if you want to view the hidden content of this post, please reply B, Gas with oil) will cause the chimney to smoke and the furnace temperature to become extremely high. A. Drop in fuel gas pressure B. Gas carrying oil C. Steam carrying water D. Fuel oil carrying water

Reply #32017-04-02

** B and D: caused by incomplete combustion or combustion delay

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Practice questions on April 2, 2017; replies will earn 2–6 points (**no scoring after it is displayed, thank you for your replies)

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