MEA 148 Understanding Ratios and Proportions in Aviation

What is the compression ratio in an internal combustion engine?

• The ratio of the volume of the cylinder when the piston is at the bottom to the volume when the piston is at the top.

• The ratio of the speed of the engine to the speed of the vehicle.

• The ratio of the fuel used to the distance travelled.

• The ratio of the air intake to the exhaust output.

What is the aspect ratio of a wing?

• The ratio of the wing's length to its width.

• The ratio of the wing's area to the aircraft's weight.

• The ratio of the wing's lift to its drag.

• The ratio of the wing's thickness to its length.

Which of the following is a characteristic of high aspect ratio wings?

• They consume more fuel.

• They are more manoeuvrable.

• They have less drag and consume less fuel.

• They are shorter and wider.

What is the constant of proportionality in a direct proportion?

• The sum of the two variables.

• The product of the two variables.

• The ratio of one variable to the other.

• The difference between the two variables.

In the context of springs, what does the spring constant of proportionality represent?

• The amount of force required to compress the spring by one metre.

• The amount of energy stored in the spring.

• The maximum length the spring can be stretched.

• The weight the spring can support without deforming.

What is a gear ratio?

• The ratio of the number of teeth on two meshing gears.

• The ratio of the speed of the input gear to the output gear.

• The ratio of the diameter of the input gear to the output gear.

• The ratio of the torque of the input gear to the output gear.

Which of the following is true for low aspect ratio wings?

• They are more efficient at high speeds.

• They are less manoeuvrable.

• They have more drag and consume more fuel.

• They are longer and narrower.

What does the term "wing platform" refer to in aviation?

• The shape and layout of the wing as viewed from above.

• The material used to construct the wing.

• The angle at which the wing is attached to the fuselage.

• The weight distribution across the wing.

In an inverse proportion, if one variable increases, what happens to the other variable?

• It increases.

• It decreases.

• It remains constant.

• It doubles.

Which of the following ratios is crucial for determining the performance of an aircraft?

• The ratio of the pilot's weight to the aircraft's weight.

• The ratio of the aircraft's speed to the wind speed.

• The ratio of the lift generated by the wings to the aircraft's weight.

• The ratio of the fuel capacity to the number of passengers.