Deficiency of combustion air during combustion of a gaseous fuel______ – McqOptions

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1.	Deficiency of combustion air during combustion of a gaseous fuel_____________________?
A.	Lengthens the flame
B.	Causes heat loss of fuel by its partial combustion
C.	Both A. & B.
D.	Shortens the flame
Answer» D. Shortens the flame

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