AMT Aircraft Weight and Balance 2

Question 1

An aircraft has an empty weight of 1,650 lbs with a CG at 87.0 inches. After adding equipment weighing 30 lbs at 130 inches, what is the new CG?

Accepted Answer

87.8 inches

Answer

New moment = (1,650 × 87) + (30 × 130) = 143,550 + 3,900 = 147,450; new weight = 1,680; CG = 147,450 ÷ 1,680 ≈ 87.8 inches.

Question 2

What is the term for the distance between the datum and the CG of an item?

Accepted Answer

Moment arm

Answer

The moment arm is the horizontal distance from the datum to the center of gravity of an item, used to calculate its moment.

Question 3

Which document establishes the forward and aft CG limits for a certificated aircraft?

Accepted Answer

Type Certificate Data Sheet (TCDS)

Answer

The Type Certificate Data Sheet (TCDS) issued by the FAA defines the approved CG range and weight limits for certificated aircraft.

Question 4

When an aircraft's CG is too far AFT, the most likely hazard is:

Accepted Answer

Reduced longitudinal stability and possible unrecoverable stall

Answer

An aft CG reduces longitudinal stability, which can make pitch control difficult and may result in an unrecoverable stall or spin.

Question 5

A useful load includes which of the following?

Accepted Answer

Crew, fuel, passengers, and cargo

Answer

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

(AMT) Aviation Maintenance Technician Practice Test