Technician A says gasoline that is used in year-round warm climates has the same volatility as a fuel blended for use in colder winter climates. Technician B says a fuel with too high of a volatility in warm climates can cause vapor lock.
A) Technician A
B) Technician B
C) Both A and B
D) Neither A nor B

Question

Quizplus · Accepted Answer

Technician A is incorrect because fuel blended for use in colder winter climates typically has a higher volatility to aid in cold starting. On the other hand, fuel blended for use in warmer climates typically has a lower volatility to minimize evaporative emissions. Therefore, gasoline used in year-round warm climates has a lower volatility compared to fuel blended for winter use. 
Technician B is correct because fuel with high volatility in warm climates can cause vapor lock, which occurs when the fuel cannot flow smoothly from the tank to the engine due to the formation of bubbles in the fuel line. This is why fuel with lower volatility is recommended for use in warmer climates to reduce the risk of vapor lock.

Technician a Says Gasoline That Is Used in Year-Round Warm