Weight and Balance Equiment

What is a likely impact of weighing an aircraft with flaps deployed and spoilers extended?

CG may shift inaccurately, compromising the result

What consequence might arise if the datum location is misunderstood during CG calculations?

Moment values will be incorrectly computed

Why is chalk line used in conjunction with a plumb bob during weighing prep?

To mark distances from datum to wheels or jacks

Which example best illustrates proper ballast use during weighing?

Installing weight aft to bring CG within limits

What is the role of strain gauges in load cell scales?

Convert mechanical pressure into electronic weight signals

What is the main function of the ZERO key on a digital platform scale display?

Normalize all scale channels before weighing

Why are moment calculations critical in CG determination?

They integrate arm distance to identify CG position

Why must the aircraft be weighed in a clean and dry condition?

To eliminate unaccounted fluid or debris weight

Why is residual fuel included in empty weight but usable fuel is not?

Residual fuel contributes to minimum operating mass

Why is it critical to ensure proper leveling of the aircraft before weighing, particularly when using platform scales?

Improper leveling directly alters moment arm calculations and CG accuracy

How is the CG formula CG = D - (F × L / W) interpreted for a tricycle gear aircraft with forward datum?

CG is calculated behind main gear regardless of datum

In what situation would you refer to the EWCG range listed on the Type Certificate Data Sheet (TCDS)?

When determining CG compliance without loading check

Which scenario would most likely invalidate a weighing session despite proper scale are calibration and apparent aircraft leveling?

Conducting the weighing procedure outdoors on a breezy day

Which of the following would require recalculating weight and balance data?

Installing avionics in the tail section

How does the CG range typically change as aircraft weight increases?

It narrows due to structural and aerodynamic limitations

When subtracting usable fuel weight to determine empty weight, what is the most accurate method to ensure proper fuel density is used?

Using a hydrometer to measure actual fuel density

In what situation would aircraft weighing be permitted with full fuel tanks?

If usable fuel is mathematically subtracted after using a hydrometer

Why is it unsafe to perform a weighing operation while someone is inside the aircraft?

Human weight distorts CG and gross weight readings

What makes top-of-jack load cells more suitable for precise aircraft leveling compared to platform scales?

They allow leveling adjustments through jack height control

What risk is introduced by failing to use jack safety collars during aircraft jacking?

Sudden jack collapse or tilt

What is the correct procedure for handling oil in an aircraft certified under CAR Part 3?

Drain oil completely or subtract known oil weight

How do you level an aircraft longitudinally on platform scales?

Inflate or deflate tires to adjust pitch

What information from the TCDS is vital during EWCG evaluation?

CG limits and datum location

What does it imply if CG is calculated as a negative number in an aft datum configuration?

CG is forward of the datum

What best describes the advantage of using a spirit level over a plumb bob in fixed-wing aircraft leveling?

It provides accurate longitudinal and lateral leveling simultaneously