<span>Both Technician A and Technician B are correct. The answer is letter B. Technician A's statement "</span>engine described uses a fuel mixture of eight parts air to one part fuel" is correct because it shows the relationship between air and the fuel ratio. A compression ratio is the ratio of the cylinder volume and the combustion chamber volume when the piston is at the bottom and the combustion chamber volume when it is at the top. Technician B is also correct because for a DOHC cam (double overhead cam) means that there are two valves present at the entrance and exit of gases.
