[Oil Transport Quiz with Prizes] 104

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Multiple-choice question. 5 questions per day; 2 wealth points for answering one question correctly, and an additional 10 wealth points if all questions are answered correctly. To prevent some members from copying other members’ answers, please hide your posts when answering questions. To hide the method, click here: Hide Method. Answer using the same IP; only the first post is valid. Also, be careful when posting – edits are invalid! 1. For drying a box-type heating furnace, once the temperature inside the furnace reaches ( )°C, it is maintained at that level for one day in order to remove any free moisture present in the refractory materials. (A)50 (B)130 (C)210 (D)320 2. When heating a box-type furnace, the furnace temperature is raised to ( )°C and held at that level for one day in order to remove the crystalline water from the refractory materials. (A)50 (B)130 (C)210 (D)320 3. The reason that can cause thick black smoke to emerge from a heating furnace’s chimney is ( ). (A) Positive pressure combustion occurs (B) Secondary combustion takes place (C) The fuel quality is poor (D) The furnace shuts down suddenly. 4. What can cause backfiring in a heating furnace burner? ( ) (A) Coking of the burner bricks (B) Incomplete combustion (C) Interruption in fuel oil supply (D) Flame licking the furnace tubes. 5. The cause that can lead to the vaporization of crude oil in a heating furnace is ( ). (A) Excessive nebulization dose (B) Positive pressure combustion in the furnace (C) Too low crude oil flow rate (D) Excessively high flue gas temperature. Answer key: B D B A C