W&B Prelim Quiz 2

A mechanic needs to calculate the moment of an aircraft component being installed. If the component weighs 50 pounds and is installed 40 inches aft of the datum, what is the moment?

• 2,000 lb-in

• 200 lb-in

• 1,000 lb-in

• 4,000 lb-in

The aircraft’s center of gravity is currently at 40 inches aft of the datum. If a 100-pound passenger moves from 50 inches to 30 inches aft of the datum, how will the CG shift?

• The CG will move aft.

• The CG will remain the same.

• The aircraft will become heavier.

• The CG will move forward.

A technician needs to ensure the aircraft is within weight and balance limits. The aircraft has a total moment of 120,000 lb-in and a total weight of 3,000 lbs. What is the center of gravity?

• 20 inches aft of the datum

• 40 inches aft of the datum

• 30 inches aft of the datum

• 50 inches aft of the datum

An aircraft has a total weight of 2,500 lbs and a total moment of 100,000 lb-in. What is the aircraft’s center of gravity (CG)?

• 25 inches

• 30 inches

• 40 inches

• 50 inches

A pilot loads a 200-pound passenger at an arm of 60 inches aft of the datum. What is the moment added to the aircraft?

• 12,000 lb-in

• 6,000 lb-in

• 3,000 lb-in

• 10,000 lb-in

A cargo shift is needed to move the CG forward by 2 inches. If a 180-pound bag is currently at 50 inches, where should it be moved to achieve this shift?

• 30 inches

• 40 inches

• 60 inches

• 20 inches

A 250-pound passenger moves from 40 inches aft of the datum to 20 inches. What is the total change in moment?

• 5,000 lb-in

• 2,500 lb-in

• 7,500 lb-in

• 10,000 lb-in

A baggage compartment at 70 inches aft is overloaded. The extra 50 lbs must be moved forward. If the new location is 30 inches aft, how much will the moment decrease?

• 1,500 lb-in

• 2,000 lb-in

• 3,000 lb-in

• 2,500 lb-in

A 300-pound weight is placed at an arm of 20 inches. To balance this with another weight at an arm of 50 inches, how heavy must the second weight be?

• 120 lbs

• 300 lbs

• 200 lbs

• 1200 lb

A cargo is loaded at 40 inches producing a moment of 16,000 lb-in. What is the weight of the cargo?

• 400 lbs

• 600 lbs

• 200 lbs

• 800 lbs