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 ft MSL, the fuel/air mixture is properly adjusted. What will occur if a descent to 4,500 ft MSL is made without readjusting the mixture

Answer 3

the fuel/air mixture may become excessively lean

Question 4

fuel/air ratio is the ratio between the

Answer 4

weight of fuel and weight of air entering the cylinder