Airplane Stuff
What is the piston displacement of a master cylinder with a 1.5-inch diameter bore and a
piston stroke of 4 inches?
7.0686 cubic inches
An aircraft had an empty weight of 2,186 pounds with a moment of 101673.78 before several
alteraƟons were made. The alterations included:
1. Removing two passenger seats (15 pounds each) at +71;
2. Installing a cabinet (97 pounds) at +81;
3. Installing a seat and safety belt (20 pounds) at +71; and
4. Installing radio equipment (40 pounds) at +94.
The alterations caused the new empty weight CG to move
+ 2.16 inches from the original empty weight CG
Rationale: ITEM WEIGHT ARM MOMENT
Aircraft 2,186 46.51 101,673.78
Seats (remove) 30(-) 71 2,130(-)
Cabinet 97 81 7,857
Seat 20 71 1,420
Radio 40 94 3,760
TOTAL 2,313 48.67 112,580.78
48.67 – 46.51 = 2.16 (aft from original CG)
If the volume of a confined gas is doubled (without the addition of more gas), the pressure
will (assume temperature remains constant):
be reduced to one-half its original value
What does Maximum Zero Fuel Weight (MZFW) exclude?
usable fuel
The forward, side to side, and reward moƟon of a helicopter is controlled by:
The cyclic
What pressure is generated when 150 lbs of force is applied to a 0.5 in² piston?
300 psi
A six-cylinder engine with a bore of 3.5 inches, a cylinder height of 7 inches and a stroke of
4.5 inches will have a total piston displacement of:
259.77 cubic inches
During a heavy maintenance check, you suspect there is a deep internal crack in a wing
spar. Which inspecƟon method should be used to confirm this?
Ultrasonic Imaging
A blueprint shows a hole of 0.17187 to be drilled. Which fraction size drill bit is most
nearly equal?
11/64
Which of the following generally yields the highest degree of aircraft leveling accuracy?
Spirit levels
How far can an airplane glide from an altitude of 8,000 feet if it has a glide ratio of 8?
64000 ft
A sweptback winged aircraFT’s LEMAC and TEMAC is defined as a distance:
From the datum
LEMAC is the leading edge of the mean aerodynamic chord, TEMAC is
the trailing edge of the mean aerodynamic chord. These are locaTIONs measured
from the datum and expressed in station numbers.
How limited can a helicopter CG range be and what limits apply?
3 inches; both longitudinal and lateral
Which inspection method for deep flaws shows internal flaws without damaging the part?
Film Radiography
What is Mr. C's favorite saying?
DO WHAT YOUR CAREER CAN HANDLE!!
How many gallons of fuel will be contained in a rectangular-shaped tank which measures
2 feet in width, 3 feet in length, and 1 foot 8 inches in depth? (7.5 gal = 1 cu Ō)
75
Which of the following corresponds with the standards of weight for the calculation of
aircraft weight and balance?
Avgas=6# per gal, Jet A= 6.7# per gal, lube oil=7.5# per gal
What is the effect of Bernoulli's Principle in lift generation?
Lower pressure above the wing.
What formula is used to calculate the moment of an object in weight and balance
calculations?
Moment = Weight × Arm
A pilot pulls the nose up steeply during climb. The aircraft begins to buffet and lose lift.
What is most likely happening?
A stally stall stall
An aircraŌ as loaded weighs 4,954 pounds at a CG of +30.5 inches. The CG range is +32.0
inches to +42.1 inches. Find the minimum weight of the ballast necessary to bring the CG
within the CG range. The ballast arm is +172 inches.
53.08 pounds
ou are preparing a fuel load plan for an aircraŌ with a scheduled layover. The aircraŌ
burns fuel at a constant rate of 900 gallons per hour. The first leg of the flight is 3 hours,
followed by a 1.5-hour final leg. To avoid refueling during the layover, how much fuel
should be loaded before departure?
4050
What tool should be used to measure the depth of a groove in an engine casing to ensure
proper fitment of a seal?
DEPTH MICROMETER
Why might an inside caliper be used during engine overhaul?
To check bore diameter
Why must excess heat be managed in aircraft electrical systems?
to prevent electrical fires