A&P Aircraft Weight & Balance

Question 1

What is the datum in aircraft weight and balance?

Accepted Answer

An imaginary vertical plane from which horizontal distances are measured

Answer

The datum is an imaginary vertical reference plane chosen by the manufacturer from which all horizontal arm distances are measured to calculate moments.

Question 2

What term describes the product of a weight multiplied by its arm?

Accepted Answer

Moment

Answer

Moment is the product of weight (in pounds) multiplied by the arm (distance from the datum in inches), expressed in pound-inches.

Question 3

Which document provides the approved CG range and weight limits for a specific certificated aircraft?

Accepted Answer

Type Certificate Data Sheet (TCDS)

Answer

The Type Certificate Data Sheet (TCDS), issued by the FAA, specifies the datum location, approved CG range, and maximum weight limits for each certificated aircraft model.

Question 4

What is included in the standard empty weight of an aircraft?

Accepted Answer

Airframe, engines, all permanently installed equipment, unusable fuel, and undrainable oil

Answer

Standard empty weight includes the airframe, engines, all permanently installed equipment, unusable fuel, and undrainable oil, but excludes usable fuel and payload.

Question 5

How is useful load defined?

Accepted Answer

The difference between maximum certificated gross weight and empty weight

Answer

Useful load is the difference between the maximum certificated gross weight and the empty weight, and includes crew, passengers, cargo, and usable fuel.

A&P - Certified Aircraft Mechanic Practice Test

A&P - Certified Aircraft Mechanic Practice Test

A&P Aircraft Weight & Balance