Aircraft Weight & Balance Practice Test

These questions are part of the practice quiz. Start practicing

• Is the baseline takeoff CG within a notional envelope of 60 to 78 inches?
• In weight and balance theory, what is the name of the distance from the fulcrum to an object?
• What is an 'arm' in weight and balance calculations?
• What is the practical effect of placing a ballast load aft (larger arm) on CG?
• What is the moment for a weight of 375 lb at 40 inches from the datum?
• An aircraft with an empty weight of 1,800 pounds and an empty weight CG of +31.5 was altered as follows: 1) two 15-pound seats removed at +72; 2) structural modifications +14 at +76; 3) seat and safety belt 20 pounds at +73.5; 4) radio equipment 30 pounds at +30. What is the new empty weight CG?
• What is the weighted-average distance of the two initial weights (10 pounds at 4 feet aft and 5 pounds at 2 feet aft) from the CG?
• Two boxes weighing 10 pounds and 5 pounds are placed in an airplane so that their distances aft from the CG are 4 feet and 2 feet respectively. How far forward of the CG should a third box weighing 20 pounds be placed so that the CG will not be changed?
• In a balance computation of an aircraft from which an item located aft of the datum was removed, use....
• What is the 'moment' in a weight and balance worksheet?
• What is the Zero Fuel Weight (ZFW) for the baseline configuration (BEW plus payload)?
• Which loading approach best centers CG around the center of gravity?
• Which statement best defines the maximum weight in weight-and-balance terms?
• To compute the maximum forward loaded CG, minimum weights, arms, and moments should be used for items of useful load that are located aft of the forward CG limit.
• 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....
• If you double the load arm while keeping weight the same, what happens to CG?
• Moving 40 lb baggage from 120 inches to 60 inches changes CG by approximately how much?
• In which attitude should an aircraft be weighed to obtain useful weight data for determining the CG?
• Given the data, what is the combined net weight on the two main gears?
• What is the net weight at tail gear in pounds?
• Which statement correctly describes ballast movement and its effect on CG?
• In aircraft weight and balance, how is the center of gravity (CG) defined?
• In weight and balance terminology, LEMAC and TEMAC are defined in terms of distance from what reference point?
• In CG weighing, the arms extend parallel to which feature of the aircraft?
• What is the total weight change from the four modifications?
• If an aircraft CG is found to be at 24 percent of MAC, that 24 percent is an expression of the distance from which reference?
• Which reference point does a CG location expressed as a percentage of MAC relate to when measuring distance?
• If ballast is added at 60 inches and is 120 lb instead of 60 lb, what is the CG?
• Given weight 1,840 lb and moment 136,080 in-lb, what is the CG approximately?
• Which statement best describes how the CG is affected when a weight located aft of CG is removed?
• What does Basic Empty Weight (BEW) represent in weight and balance calculations?
• When weighing an aircraft with full fuel tanks, which fuel weight is not subtracted from the scale readings?
• If the 10-pound and 5-pound weights are moved farther aft from the CG, the center of gravity would move in which direction?
• If the empty weight is 5,862 pounds and 20 pounds of potable water and 23 pounds of hydraulic fluid are on board, what is the total weight of the aircraft?
• Why is it important to know the CG limits (forward and aft) for flight planning?
• How would you present a weight and balance calculation if you have multiple stations with different arms?
• Which statement correctly describes ballast and CG movement?
• The major source of weight change for most aircraft as they age is caused by which factor?
• If you are given a CG at 77.6 in and the aft limit is 78 in, how far can you move the CG aft before reaching the limit?
• Unusable fuel, in some data sets, may be included in BEW or listed separately for balance calculations.
• The amount of fuel used for computing empty weight and corresponding CG is....
• What is a CG envelope?
• Where do you look to determine the operating CG range when calculating a new aircraft weight and balance document?
• Which FAA-approved document gives the leveling means to be used when weighing an aircraft?
• What is the typical unit for CG location in weight and balance problems?
• What should be clearly indicated on the aircraft weighing form?
• How does burning fuel located at 96 inches arm affect CG?
• Which data components are essential to compute center of gravity?
• An aircraft loaded weighs 4,954 pounds at a CG of +30.5 inches. The CG range is +32.0 to +42.1 inches. Ballast at +162 inches is used to bring the CG within range. What is the minimum ballast weight required?
• In weight and balance practice, which unit is commonly used to express the CG location along the datum?
• 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, what happens to all measurement arms?
• In our baseline data, what is the arm for the fuel weight?
• If the datum is placed at the nose rather than the firewall, what is the effect on the sign of all measurement arms?
• Which unit is used to express the CG location in the example?
• If CG is outside the forward limit, what is the general corrective action?
• Which of the following is a typical component that contributes to the useful load?
• The maximum weight as used in weight and balance control of a given aircraft can normally be found
• In the baseline data, what would be the weight and moment if no fuel is carried?
• If 60 gallons of fuel are burned (360 lb) from the baseline configuration, what is the new weight and CG?
• Which of the following can provide the empty weight of an aircraft if the weight and balance records become lost or inaccurate?
• Which expression correctly defines useful load?
• What is the total moment when the empty-weight moment is 885,957 in-lb and the added water/hydraulic moments total 4,003 in-lb?
• By how many inches forward did the CG move when the 20 pounds of potable water and 23 pounds of hydraulic fluid were added, compared to the empty-CG position?
• Regarding the statements about private aircraft weighing, which is/are true? (1) Private aircraft are weighed periodically. (2) Private aircraft are weighed after alterations.
• When making a rearward weight and balance check to determine that the CG will not exceed the rearward limit during extreme conditions, the items of useful load which should be computed at their minimum weights are those located forward of the
• How do you interpret a CG value that is exactly at the forward limit?
• An empty aircraft is weighed with the main gear net weight of 3,540 pounds at an arm of 195.5 inches and the nose gear net weight of 2,322 pounds at an arm of 83.5 inches. The datum line is forward of the nose. What is the empty CG in inches?
• Which statement defines datum in CG problems?
• An aircraft had an empty weight of 998 pounds with an empty weight CG of 13.48 inches. After replacing the engine as described, the new empty weight CG is which value?
• If 40 lb of baggage is moved from 120 inches to 60 inches, with weight remaining 2,200 lb, what is the new CG?
• What is the most common reason to use ballast in weight and balance?
• How would you describe “payload” in weight and balance?
• Which expression correctly defines CG?
• In the same four-step example, what is the weight of the radio equipment installed?
• What is the takeoff weight with full fuel for the baseline configuration?
• What is the new empty weight CG after the listed alterations?
• What is a typical weight per gallon used for aviation fuel in balance problems?
• If all seats are occupied, full baggage weight is carried, and all fuel tanks are full, what will be the weight condition of the aircraft?
• How is the moment for a given weight and its location determined?
• If ballast is moved toward the forward stations, what happens to the CG?
• Do weight and balance procedures for airplanes generally apply to helicopters?
• Which elements are directly used to determine moments in CG calculations?
• An aircraft with an empty weight of 1,500 pounds and an empty weight CG of +28.4 was altered by removing two 12-pound seats located at +68.5, adding 28 pounds at +73, installing a 30-pound seat at +70.5, and 25 pounds of radio at +85. What is the new empty weight CG?
• What is the purpose of a CG envelope in flight operations?
• What is the datum in weight and balance terms?
• If a payload of 150 lb is moved from arm 70 in to 90 in, the change in total moment is what?
• When dealing with weight and balance, the term 'maximum weight' is interpreted to mean which of the following?
• In the four-step loading example, which modification contributed the largest increase in total moment?
• What practical steps would you take to adjust the CG during preflight planning?
• What is the payload in the baseline configuration (pilot, passenger, and baggage)?
• In a balance calculation, removing an aft located item uses which expression?
• An aircraft had an empty weight of 2,886 pounds with a moment of 101,673.78 before several alterations were made. The alterations included: removing two passenger seats (15 pounds each) at +71; installing a cabinet (97 pounds) at +71; installing a seat and safety belt (20 pounds) at +71; and installing radio equipment (30 pounds) at +94. The alterations caused the new empty weight CG to move
• What is the total weight of all three landing-gear components (right main, left main, and tail) based on the figures provided?
• If CG is outside the aft limit, what is the general corrective action?
• Which boundary defines the forward limit for loading calculations?
• What is the relationship between MTOW and CG checks?
• To ensure CG remains within envelope during flight, what practice helps?
• Which formula relates center of gravity to weight and moment?
• Which statement is true about CG and weight?
• What is the CG range used in many weight and balance problems, expressed in inches?
• How do you compute the center of gravity (CG) from weight and moment?
• When are adverse loading checks conducted?
• Which statement correctly defines Zero Fuel Weight (ZFW)?
• What type of measurement is used to designate the arm in weight and balance computation?
• If you have a forward shift in weight, what general trend do you expect in the CG value?
• How can you determine if a particular load configuration is acceptable?
• If ballast of 60 lb is added at 60 inches, what is the new CG?
• The useful load of an aircraft is the difference between which two weights?
• Which tasks are completed prior to weighing an aircraft to determine its empty weight?
• What is the CG when a ballast of 120 lb is placed at 60 inches?
• Improper loading of a helicopter which results in exceeding fore or aft CG limits is hazardous due to the....
• Hydraulic fluid weighing 23 pounds located at +101 inches from the datum contributes how many inch-pounds of moment?
• When accomplishing loading computations for a small aircraft, necessary information obtained from the weight and balance records would include which of the following?
• What is the new empty weight after the four modifications?
• When computing weight and balance, an airplane is considered to be in balance when
• What is the general purpose of a weight and balance worksheet?
• After including the potable water and hydraulic fluids, the center of gravity of the aircraft is located at approximately how many inches from the datum?
• A weight of 480 lb located 50 inches from the datum has a moment of how many inch-pounds?
• In weight and balance, which unit is used for weight?
• In the baseline configuration, which option correctly states the Basic Empty Weight and its CG position?
• If an additional 40 lb bag is moved from 120 inches to 60 inches (weight still 2,220 lb), what is the CG?
• Which factor does not directly influence CG position?
• Maximum zero fuel weight is the maximum permissible weight of a loaded aircraft (passengers, crew, and cargo) without fuel. What does it represent?
• What is meant by the term 'residual fuel'?
• What is the total useful load in the baseline configuration (payload plus usable fuel)?
• What is a practical method to verify CG calculations on a worksheet?
• What elements are documented on a weight and balance worksheet?
• Baseline weight with full fuel is:
• If the total weight increases but total moment stays the same, what happens to CG?
• A weight of 600 lb located at 50 inches has a moment of 30,000 in-lb. Which option shows this correct moment?
• Which feature is included as part of the empty weight in the computation for a certificated aircraft?
• datum is forward of the main gear center point 30.24 inches. Actual distance between tail gear and main gear center points 360.26 inches. Net weight at right main gear 9,980 pounds. Net weight at left main gear 9,770 pounds. Net weight at tail gear 1,970 pounds. What is the empty weight CG of the aircraft described above?
• When an aircraft is positioned for weighing on scales located under each landing gear wheel, which of the following may cause erroneous scale readings?
• In the data, the numbers +352 and +380 appear next to weights. What do these numbers represent?
• How do you interpret a CG value that is exactly at the aft limit?
• What is the usable fuel weight when 40 gallons are on board?
• How do you express the CG in inches for most baseline problems?
• Which document contains the official limits for an aircraft's weight and balance, including maximum weight?
• Combined moment from the potable water and hydraulic fluid is which value in inch-pounds?
• Which of the following is not a factor in CG calculations: weight, arm, moment, or color of aircraft?
• The CG range in single-rotor helicopters is
• What determines whether the moment value is preceded by a plus or minus sign in aircraft weight and balance calculations?
• Ramp weight vs takeoff weight definitions.
• Where is the datum line located relative to the nose in the example?
• Find the empty weight CG location for the following tricycle-gear aircraft: Each main wheel weighs 753 pounds, nosewheel weighs 22 pounds, distance between nosewheel and main wheels is 87.5 inches, nosewheel location is +9.875 inches from datum, with 1 gallon of hydraulic fluid at -21.0 inches included in the weight scale.
• Potable water weighing 20 pounds located at +84 inches from the datum contributes how many inch-pounds of moment?
• If the empty weight CG lies within the empty weight CG limits, which statement is true?
• What is the moment contributed by the 10-pound weight located 4 feet aft of the CG, expressed in ft-lb?
• If ballast is added at the forward station, the CG will:
• In the baseline data, the weight equals BEW plus payload.
• What is the total added weight from the potable water and hydraulic fluid?
• If you are given a CG at 77.6 in and the forward limit is 60 in, how much forward movement is needed to reach the forward limit?
• If you move the entire payload from the rear seat (arm 84 in) to the front seat (arm 60 in) without changing total weight, what happens to CG?
• LEMAC and TEMAC are defined in terms of distance from which reference point?
• If a 40-pound generator applies +1400 inch-pounds to a reference axis, the generator is located how far from the axis?
• If the CG is 62 inches in a typical problem, is it within the typical range?
• The maximum weight of an aircraft is defined as which of the following?
• Which of the following is not part of verifying a load configuration for CG and weight?
• Which instrument generally yields the highest degree of aircraft leveling accuracy?
• What is the total moment for the baseline configuration with full fuel?
• As weighed, the empty weight of an aircraft is 5,862 pounds with a moment of 885,957. If 20 pounds of potable water are on board at +84 and 23 pounds of hydraulic fluid are in a tank at +101, what is the empty weight CG of the aircraft?
• Residual fuel is defined as the fuel remaining in which parts after draining?
• If you distribute weight toward the mid-arms, what happens to CG position?
• The useful load of an aircraft consists of which of the following components?
• In a scenario with an aircraft having an empty weight of 2100 pounds and an empty weight CG of +32.5 inches, what is the empty weight CG before modifications?
• What is the baseline takeoff center of gravity (inches from datum) with full fuel?
• In the process of weighing toward obtaining the CG, the arms from the weighing points always extend which way?
• Which statement best describes an envelope of CG and weight?
• To keep CG near the center of the envelope, which loading strategy might you use?
• If fuel is burned from forward compartments, CG tends to move toward which direction?
• What is the difference between “ramp weight” and the “takeoff weight”?
• Which statement best describes baseline weight in a CG problem?
• When determining the empty weight of an aircraft certificated under current airworthiness standards (14 CFR Part 23), the oil contained in the supply tank is considered....
• What does 'unusable fuel' refer to, and how is it treated in some data sets?
• How is the empty weight of an aircraft determined?
• If 20 lb is added at 60 inches while weight becomes 2,220 lb, what is the new CG?
• The following alteration was performed on an aircraft: A model B engine weighing 175 pounds was replaced by a model D engine weighing 185 pounds at a -62.00-inch station. The aircraft weight and balance records show the previous empty weight to be 998 pounds and an empty weight CG of 13.48 inches. What is the new empty weight CG?