Vintage engines have a fuel injection system that mixes fuel and air in response to the amount of air that flows through it.
Answer the following statement true (T) or false (F)
False
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For a bicycle path with an average speed of 20 mi/h, a maximum superelevation of 2%, and a total change in grade of 10%, determine the minimum radius of horizontal curvature and the minimum length of the vertical curve.
What will be an ideal response?
Technician A says that a transfer case may use GL-4 gear lube such as SAE 80W-90. Technician B says that a transfer case may use automatic transmission fluid (ATF) such as Dexron III. Which technician is correct?
A) Technician A only B) Technician B only C) Both technicians A and B D) Neither technician A nor B
Technician A says that a MAF sensor actually measures the density and amount of air flowing into the engine. Technician B says a that hot wire MAF sensor uses the electronics in the sensor itself to heat a wire 70°C above the temperature of the air entering the engine. Who is right?
A) Technician A only B) Technician B only C) Both technicians A and B D) Neither technician A nor B
If a PWM signal is high for 5 ms and low for 10 ms during a single period, what is the duty cycle of the signal?
A. 300% B. 200% C. (1/2) * 100% D. (1/3) * 100% E. (1/4) * 100%