__________ the exhaust gas is an indication of the incomplete combusti

1.	__________ the exhaust gas is an indication of the incomplete combustion of fuel.
A.	Low temperature of
B.	High temperature of
C.	High % of CO in
D.	High % of CO2 in
Answer» D. High % of CO2 in

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__________ the exhaust gas is an indication of the incomplete combustion of fuel.

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