WEIGHT AND BALANCE

Question 1

When computing weight and balance, an airplane is considered to be in balance when

Answer 1

the average moment arm of the loaded airplane falls within its CG range

Question 2

What tasks are completed prior to weighing an aircraft to determine its empty weight?

Answer 2

Remove all items except those on the aircraft equipment list; drain fuel and fill hydraulic reservoir

Question 3

What is meant by the term “residual fuel”?

Answer 3

The fuel remaining in the tanks, lines, and engine after draining

Question 4

The useful load of an aircraft consists of the

Answer 4

crew, usable fuel, passengers, and cargo

Question 5

Which of the following can provide the empty weight of an aircraft if the aircraft’s weight and balance records become lost, destroyed, or otherwise inaccurate?

Answer 5

Reweighing the aircraft

Question 6

Where do you look to determine the operating CG range when calculating a new aircraft weight and balance document?

Answer 6

It is found in the TCDS

Question 7

In the theory of weight and balance, what is the name of the distance from the fulcrum to an object?

Answer 7

Lever arm

Question 8

In the process of weighing an airplane toward obtaining the CF, the arms from the weighing points always extend

Answer 8

parallel to the centerline of the airplane

Question 9

Which would have an effect on aircraft CG results when conducting a weight and balance check:

Answer 9

Leaving the downlocks installed

Question 10

When an aircraft is positioned for weighing on scales located under each landing gear wheel, which of the following may cause erroneous scale readings?

Answer 10

Parking brakes set

Question 11

(1) Private aircraft are required by regulations to be weighed periodically
(2) Private aircraft are required to be weighed after making any alteration

Answer 11

NONE

Question 12

What FAA-approved document gives the leveling means to be used when weighing an aircraft?

Answer 12

TCDS

Question 13

Use of which of the following generally yields the highest degree of aircraft leveling accuracy?

Answer 13

Spirit level

Question 14

To obtain useful weight data for purposes of determining CG, it is necessary that an aircraft be weight

Answer 14

in a level flight attitude

Question 15

What type of measurement is used to designate the arm in weight and balance computation?

Answer 15

Distance

Question 16

What determines whether the value of a moment is preceded by a plus or a minus sign in aircraft weight and balance?

Answer 16

The result of a weight being added or removed and its location relative to the datum

Question 17

The maximum weight of an aircraft is the

Answer 17

empty weight plus useful load

Question 18

Which statement is true regarding helicopter weight and balance?

Answer 18

Weight and balance procedures for airplanes generally also apply to helicopters

Question 19

What should be clearly indicated on the aircraft weighing form?

Answer 19

Weighing points

Question 20

If the reference datum line is placed at the nose of an airplane rather than at the firewall or some other location aft of the nose

Answer 20

all measurement arms will be in positive numbers

Question 21

Maximum zero fuel weight is the

Answer 21

maximum permissible weight of a loaded aircraft (passengers, crew, and cargo) without fuel

Question 22

If it is necessary to weigh an aircraft with full fuel tanks, all fuel weight must be subtracted from the scale readings

Answer 22

except unusable fuel

Question 23

The empty weight of an airplane is determined by

Answer 23

ubtracting the tare weight from the scale reading and adding the weight of each weighing point

Question 24

When dealing with weight and balance of an aircraft, the term “maximum weight” is interpreted to mean the maximum

Answer 24

authorized weight of the aircraft and its contents

Question 25

Most modern aircraft are designed so that if all seats are occupied, full baggage weight is carried, and all tanks are full, what will be the weight condition of the aircraft

Answer 25

It will be in excess of maximum takeoff weight

Question 26

The major source of weight change for most aircraft as they age is caused by

Answer 26

repairs and alterations

Question 27

The useful load of an aircraft is the difference between

Answer 27

the maximum takeoff weight and basic empty weight

Question 28

When determining the empty weight of an aircraft, certificated under current airworthiness standards, the oil contained in the supply is considered

Answer 28

part of the empty weight

Question 29

Improper loading of a helicopter which results in exceeding either the fore or aft CG limits is hazardous due to the

Answer 29

reduction or loss of effective cyclic pitch control

Question 30

The maximum weight as used in weight and balance control of a given aircraft can normally be found

Answer 30

in the Aircraft Specification or TCDS

Question 31

An aircraft with an empty weight of 2100lbs and an empty weight CG of +32.5 was altered as follows:

1) 2x 18 lbs @ +73 seats removed
2) 17 lbs @ + 77 structural modifications installed
3) 25 lbs @ + 74.5 seat and safety belt installed
4) 35 lbs @ +95 radio installed

Answer 31

2141 lbs @ +33.68

Question 32

The CG range in single rotor helicopters is

Answer 32

more restricted than for airplanes

Question 33

The amount of fuel used for computing empty weight and corresponding CG is

Answer 33

unusable fuel

Question 34

An aircraft as loaded weighs 4954 @ +30.5. The CG range is +32 to 42.1. Find the minimum weight of the ballast necessary to bring the CG within the CG range. The ballast arm is 162

Answer 34

57.16 lbs

Question 35

As weighed, the total empty weight of an aircraft is 5862 lbs with a moment of 885,957. However when the aircraft was weight, 20 lbs of potable water were on board +84 and 23 lbs of hydraulic fluid are in a tank located at +101. What is the empty weight CG of the aircraft?

Answer 35

151.365

Question 36

Two boxes which weight 10 lbs and 5 lbs are placed in an airplane so that their distance aft from the CG are 4’ and 2’ respectively. How far forward of the CG should a 3rd box weighing 20 lbs be placed so that the CG will not be changed?

Answer 36

2.5’

Question 37

If a 40 lbs generator applies +1400 inch pounds to a reference axis, the generator is located

Answer 37

+35 from the axis

Question 38

In a balance computation of an aircraft from which an item located aft of the datum was removed, use

Answer 38

-weight * +arm = -moment

Question 39

All other things being equal, if an item of useful load located aft of an aircraft’s CG is removed, the aircraft’s CG change will be

Answer 39

forward in proportion to the weight of the item and its location in the aircraft

Question 40

When making a rearward weight and balance check to determine that the CG will not exceed the rearward limit during extreme conditions, items of useful load which should be computed at their minimum weights are those located forward of the

Answer 40

rearward CG limit

Question 41

When, or under what condition(s) are adverse loading checks conducted?

Answer 41

Anytime a repair or alteration causes EWCG to fall outside the CG range

Question 42

When accomplishing loading computations for a small aircraft, necessary information obtained from the weight and balance records would include

Answer 42

current empty weight and empty weight CG

Question 43

If the EWCG of an airplane lies within the empty weight CG limits,

Answer 43

it is not necessary to calculate CG extremes

Question 44

When computing the maximum forward loaded CG of an aircraft, minimum weights, arms, and moments should be used for items of useful load that are located aft of the

Answer 44

forward CG limit

Question 45

An aircraft’s LEMAC and TEMAC are defined in terms of distance

Answer 45

from the datum

Question 46

If an aircraft CG is found to be at 24% of MAC, that 24% is an expression of the

Answer 46

average distance from the LEMAC to the wing center of lift