Question

Which of the following given below as the affect on amount natural draught?

(a) Boiler operation

(b) Size of the furnace

(c) Grade of the fuel

(d) Dust content in the fuel is used

The question was asked during an interview for a job.

This intriguing question originated from Draught System topic in section Steam Generators & Accessories of Energy Engineering

Answer 1

The correct answer is (a) Boiler operation

To elaborate: The draught produced in the chimney is due to the temperature difference of the hot flue gases. In addition to this, height of the above the furnaces grate, whether conditions and boiler operations also have considerable effect on the amount of natural draught.