The amount of tetraethyl lead added to improve the octane number of motor gasoline is around ______________ c.c per gallon of petrol?
Correct answer: A. 3
- A. 3
- B. 300
- C. 3000
- D. 1000
Explanation
Historically, tetraethyl lead was added at roughly 1 to 4 cc per US gallon, so about 3 cc per gallon is the appropriate value. The larger figures are impossible as practical fuel-additive dosages.
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