CFI Weight and Balance

Question 1 of 44

1. Question

The center of gravity of an aircraft is computed along the

lateral axis.
vertical axis.
longitudinal axis.

Question 2 of 44

2. Question

The center of gravity of an aircraft can be determined by

dividing total arm by total moment.
dividing total moment by total weight.
multiplying total arm by total weight.

Question 3 of 44

3. Question

As the CG location is changed, recovery from a stall becomes progressively

less difficult as the CG moves rearward.
more difficult as the CG moves rearward.
more difficult as the CG moves either forward or rearward.

Question 4 of 44

4. Question

When an aircraft’s forward CG limit is exceeded, it will affect the flight characteristics of the aircraft by producing

improved performance since it reduces the induced drag.
higher stalling speeds and more longitudinal stability.
very light elevator control forces which make it easy to inadvertently overstress the aircraft.

Question 5 of 44

5. Question

An aircraft is loaded with the CG at the aft limit. What are the performance characteristics compared with the CG at the forward limit?

The aft CG provides the highest stall speed and cruising speed.
The aft CG provides the lowest stalling speed, the highest cruising speed, and least stability.
Cruising speed is lower because of more induced drag created by the elevator or stabilizer being required to provide more lift with an aft CG.

Question 6 of 44

6. Question

An aircraft is loaded with the CG aft of the aft limit. What effect will this have on controllability?

Stall and spin recovery may be difficult or impossible.
A stall will occur at a lower airspeed, but recovery will be easier because of reduced wing loading.
A stall will occur at a higher indicated airspeed due to the greater downloading on the elevator.

Question 7 of 44

7. Question

What is the effect of center of gravity on the spin characteristics of an aircraft?

A flat spin may develop if the CG is too far aft.
If the CG is too far forward, spin entry will be difficult.
If the CG is too far aft, spins can become high speed spirals.

Question 8 of 44

8. Question

What is the effect of center of gravity on the spin characteristics of a fixed-wing aircraft? If the CG is too far

aft, a flat spin may develop.
forward, spin entry will be difficult.
aft, spins can become high-speed spirals.

Question 9 of 44

9. Question

The stalling speed of an aircraft will be highest when the aircraft is loaded with a

high gross weight and aft CG.
low gross weight and forward CG.
high gross weight and forward CG.

Question 10 of 44

10. Question

As the CG moves aft, an aircraft becomes

less stable and less controllable
less stable, yet easier to control.
more stable and controllable as long as the aft CG is not exceeded.

Question 11 of 44

11. Question

If the CG of an aircraft is moved from the aft limit to beyond the forward limit, how will it affect the cruising and stalling speed?

Increase both the cruising speed and stalling speed.
Decrease both the cruising speed and stalling speed.
Decrease the cruising speed and increase the stalling speed

Question 12 of 44

12. Question

What is characteristic of the indicated airspeed if the CG is at the most forward allowable position and constant power and altitude are maintained?

There is no relationship between CG location and indicated airspeed.
Indicated airspeed will be less than it would be with the CG in the most rearward allowable position.
Indicated airspeed will be greater than it would be with the CG in the most rearward allowable position.

Question 13 of 44

13. Question

To maintain level flight in an airplane which is loaded with the CG at the forward limit, an additional download must be imposed on the horizontal stabilizer. This in turn produces

an additional load which the wing must support.
a lesser load that must be supported by the wing.
a decrease in drag and results in a faster airspeed.

Question 14 of 44

14. Question

Under which condition is a forward CG most critical?

On takeoff.
On landing.
When in an unusual attitude.

Question 15 of 44

15. Question

If the nosewheel of an airplane moves aft during gear retraction, how would this aft movement affect the CG location of that airplane? It would

cause the CG location to move aft.
have no effect on the CG location.
cause the CG location to move forward.

Question 16 of 44

16. Question

If the landing gear on an airplane moves forward during retraction, the total moment wil

increase.
decrease.
remain the same

Question 17 of 44

17. Question

Based on this information, the CG would be located how far aft of datum?

Weight A 120 lb at 15″ aft of datum
Weight B 200 lb at 117″ aft of datum
Weight C 75 lb at 195″ aft of datum

100.8 inches.
109.0 inches.
121.7 inches.

Question 18 of 44

18. Question

Based on this information, the CG would be located how far aft of datum?
Weight D 160 lb at 45″ aft of datum
Weight E 170 lb at 145″ aft of datum
Weight F 105 lb at 185″ aft of datum

86.0 inches aft of datum.
117.8 inches aft of datum.
125.0 inches aft of datum

Question 19 of 44

19. Question

Based on this information, the CG would be located how far aft of datum?

Weight X 130 lb at 17″ aft of datum
Weight Y 110 lb at 11O” aft of datum
Weight Z 75 lb at 21O” aft of datum

89.1 inches.
95.4 inches.
106.9 inches.

Question 20 of 44

20. Question

Refer to the diagram below. How should the 1,000-pound weight A be shifted to balance the plank on the fulcrum? Weight B is 500 pounds.

12.5 inches to the right.
37.5 inches to the right.
37.5 inches to the left.

Question 21 of 44

21. Question

Refer to the diagram below. All three weights are 10 pounds. How should weight C be shifted to balance the plank on the CG?

36 inches to the left.
36 inches to the right.
64 inches to the right

Question 22 of 44

22. Question

Refer to the diagram below. Weight A is 200 pounds and weight B is 250 pounds. How much weight should weight C equal to balance the plank on the fulcrum?

56 pounds.
586 pounds.
443 pounds.

Question 23 of 44

23. Question

Refer to the diagram below. Weight A is 500 pounds and weight B is 250 pounds. How much does weight C weigh?

625 pounds.
250 pounds.
31,250 pounds.

Question 24 of 44

24. Question

Refer to the diagram below. If 50 pounds of weight is located at point X and 100 pounds at point Z, how much weight must be located at point Y to balance the plank?

30 pounds.
50 pounds.
300 pounds.

Question 25 of 44

25. Question

Refer to the diagram below. If 50-pound weights are located at points X, Y, and Z, how would point Z have to be shifted to balance the plank?

25 inches to the left.
2.5 inches to the left.
2.5 inches to the right.

Question 26 of 44

26. Question

Refer to the diagram below. How should the 500-pound weight B be shifted to balance the plank on the fulcrum? Weight A is 1,000 pounds.

75 inches to the left.
75 inches to the right.
100 inches to the right.

Question 27 of 44

27. Question

Refer to the diagram below. If 50 pounds of weight is located at point X and 100 pounds at point Y, how much weight must be located at point Z to balance the plank?

150 pounds.
100 pounds.
50 pounds.

Question 28 of 44

28. Question

Refer to the diagram below. Determine the condition of the airplane.

Pilot and copilot    375 pounds
Passengers – aft position 245 pounds
Baggage    65 pounds
Fuel    70 gallons

185 pounds under allowable gross weight, CG is located within limits.
162 pounds under allowable gross weight, CG is located within limits.
162 pounds under allowable gross weight, CG is located aft of the aft limit.

Question 29 of 44

29. Question

Refer to the diagram below. Determine the condition of the airplane.

Pilot and copilot 400 lb.
Passengers – aft position 240 lb.
Baggage 20 lb.
Fuel 75 gallons

157 pounds under allowable gross weight; CG is located within limits.
180 pounds under allowable gross weight; CG is located within limits.
180 pounds under allowable gross weight, but CG is located aft of the aft limit.

Question 30 of 44

30. Question

Refer to the diagram below. (Chart moments are divided by 100 but not labeled.) What effect does a 35-gallon fuel burn have on the weight and balance if the airplane weighed 2,890 pounds and the MOM/100 was 2,452 at takeoff?

Weight is reduced by 210 pounds and the CG moves aft.
Weight is reduced by 270 pounds and the CG is unaffected.
Weight is reduced to 2,680 pounds and the CG moves forward.

Question 31 of 44

31. Question

Refer to the diagram below. Determine the condition of the airplane.

Pilot and copilot 316 lb.
Passengers
Fwd position 130 lb.
Aft position 147 lb.
Baggage 50 lb.
Fuel 75 gallons

197 pounds under allowable gross weight; CG 83.6 inches aft of datum.
163 pounds under allowable gross weight; CG 82 inches aft of datum.
197 pounds under allowable gross weight; CG 84.6 inches aft of datum.

Question 32 of 44

32. Question

Determine the condition of the airplane.

Pilot    160 lb. 26 inch arm
Passenger 120 lb. 26 inch arm
Baggage 80 lb. 62 inch am
Fuel 24 gallons    7 inch arm
Aircraft empty weight= 730.5 lb.
Empty CG= 17 inches
MAC=    59 inches
MGTOW = 1,320 lb.

The aircraft is slightly over MGTOW with the CG aft of the aft limit of 37% MAC.
The aircraft is under MGTOW with the CG at 35.2% MAC.
The CG is forward of the aft limit of 37% and the aircraft is 100 pounds under MGTOW.

Question 33 of 44

33. Question

With respect to using the weight information given in a typical aircraft owner’s manual for computing gross weight, it is important to know that if items have been installed in the aircraft in addition to the original equipment, the

allowable useful load is decreased.
allowable useful load remains unchanged.
maximum allowable gross weight is increased.

Question 34 of 44

34. Question

What is the maximum weight that could be added at Station 130.0 without exceeding the aft CG limit?

Total weight    2,900 lb
CG location Station    115.0
Aft CG limit Station    116.0

14 pounds.
140 pounds.
207 pounds.

Question 35 of 44

35. Question

What is the maximum weight that could be added at Station 150.0 without exceeding the aft CG limit?

Aircraft weight 5,000 lb.
CG location Station 80.0
Aft CG limit Station 80.5

70.0 pounds.
69.5 pounds.
35.9 pounds.

Question 36 of 44

36. Question

How much weight could be added at Station 160 without exceeding the aft CG limit?

Total weight 8,300 lb
CG location Station 90.0
Aft CG limit Station 90.5

59.7 pounds.
16.5 pounds.
13.9 pounds.

Question 37 of 44

37. Question

How much weight could be added at Station 120 without exceeding the aft CG limit?

Total weight 9,500 lb
CG location Station 90.0
Aft CG limit Station 90.5

61.0 pounds.
110.5 pounds.
161.0 pounds.

Question 38 of 44

38. Question

What is the location of the CG if 90 pounds are removed from Station 140?

Total weight 6,230 lb.
CG location Station 79

79.9
78.1
77.9

Question 39 of 44

39. Question

What is the location of the CG if 60 pounds are removed from Station 70?

Total weight 8,420 lb.
CG location Station 85

85.1
84.9
84.1

Question 40 of 44

40. Question

What is the location of the CG if 146 pounds are removed from Station 150.

Total weight 7,152 lb.
CG Location Station 82

83.4
81.3
80.6

Question 41 of 44

41. Question

What would be the new CG location if 135 pounds of weight were added at Station 109.0?

Total weight 2,340 lb.
CG location Station 103.

Station 103.3.
Station 104.2.
Station 109.3.

Question 42 of 44

42. Question

How much weight must be shifted from Station 150.0 to Station 30.0 to move the CG to exactly the aft CG limit

Total weight 7,500 lb.
CG location Station 80.5
Aft CG Limit Station 79.5

68.9 pounds.
65.8 pounds.
62.5 pounds.

Question 43 of 44

43. Question

Could 100 pounds of weight be shifted from Station 130.0 to Station 30.0 without exceeding the forward CG limit?

Total weight 2,800 lb.
CG location Station 120.0
Forward CG limit Station 117.0

No; the new CG would be located at Station 116.89.
No; the new CG would be located at Station 116.42.
Yes; the new CG would be located at Station 117.89.

Question 44 of 44

44. Question

Could 100 pounds of weight be shifted from Station 30.0 to Station 120.0 without exceeding the aft CG limit?

Total weight    4,750 lb.
CG location    Station 115.8
Aft CG limit    Station 118.0

Yes; the CG would remain at Station 115.8.
No; the new CG would be located at Station 118.15.
Yes; the new CG would be located at Station 117.69