2.15: Fuel/Air Mixture

Question 1

During the run-up at a high-elevation airport, a pilot notes a slight engine roughness that is not affected by the magneto check but grows worse during the carburetor heat check. Under these circumstances, what would be the most logical initial action?

Answer 1

Check the results obtained with a leaner setting of the mixture.

Question 2

The basic purpose of adjusting the fuel/air mixture at altitude is to

Answer 2

decrease the fuel flow in order to compensate for decreased air density.

Question 3

While cruising at 9,500 feet MSL, the fuel/air mixture is properly adjusted. What will occur is a descent to 4,500 feet MSL is made with readjusting the mixture?

Answer 3

The fuel/air mixture may become excessively lean.

Question 4

Fuel/air mixture is the ratio between the

Answer 4

weight of fuel and weight of air entering the cylinder.