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Chapter 8

Fuels and Combustion

QuestionAnswer
The lowest temperature at which the vapor of fuel oil ignites when exposed to an open flame is its ? point a. flash b. fire c. pour d. viscosity a. flash
Air supplied to the burner that is more than the theoretical amount needed to burn a fuel is ? air a. control b. excess c. secondary d. primary b. excess
When the temperature of fuel oil increases, its viscosity ? a. remains the same b. increases c. decreases d. is not affected by the temperature c. decreases
The lowest temperature at which fuel oil will flow is its ? point a. flash b. fire c. pour d. viscosity b. fire
Fuel oil with a low flash point would be ? a. easy to pour b. used only in high pressure plants c. used in either high or low pressure plants d. dangerous to use d. dangerous to use
A ? fire extinguisher is the correct type to use on fuel oil fires a. foam or dry chemical b. soda water c. carbon tetrachloride d. feedwater a. foam or dry chemical
Air used to atomize fuel oil is ? air a. control b. excess c. secondary d. primary d. primary
Air that controls how completely a fuel is burned is ? air a. control b. forced draft c. secondary d. primary c. secondary
? combustion is when all the fuel is burned using the minimum amount of excess air a. complete b. incomplete c. perfect d. theoretical a. complete
air contains approximately ? % oxygen a. 5 b. 21 c. 50 d. 79 b. 21
Soot and smoke are the result of ? combustion a. incomplete b. complete c. perfect d. theoretical a. incomplete
The lowest temperature at which fuel oil will burn continuously when exposed to an open flame is its ? point a. flash b. fire c. pour d. viscosity a. flash
? must be heated to reach the required temperature for combustion a. Number 2 fuel oil b. Number 6 fuel oil c. Coal d. Natural gas b. number 6 fuel oil
? will support combustion but is itself combustible a. nitrogen b. sulfur c. oxygen d. hydrogen c. oxygen
Created by: zmos89
 

 



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