A&P General (AMG) practice questions with answers

Answer: D) About 5 hours

• AIncorrect. The rating supports a 5-ampere load much longer.
• BIncorrect. Capacity is divided by the load, not multiplied.
• CIncorrect. Subtracting the load from the rating is not valid.
• DCorrect. 25 ampere-hours ÷ 5 amperes = about 5 hours.

Answer: B) 60 ohms

• AIncorrect. That is the parallel combination.
• BCorrect. Series resistances add: 10 + 20 + 30 = 60 Ω.
• CIncorrect. That is the average, not the total.
• DIncorrect. Series resistances add, not multiply.

Answer: B) The section location

• AIncorrect. Hidden edges use short dashes.
• BCorrect. It marks where the part is imagined cut to make a sectional view.
• CIncorrect. Dimension lines show measurements.
• DIncorrect. Center lines do that.

Answer: A) A shortened section

• ACorrect. Break lines show that a long, uniform section has been shortened.
• BIncorrect. It is a drawing convention.
• CIncorrect. Hidden lines show that.
• DIncorrect. Weld symbols show that.

Answer: D) About 82.3 inches

• AIncorrect. 95 inches is only the fuel's arm.
• BIncorrect. That averages the three arms without weighting them.
• CIncorrect. 80 inches is only the empty-weight CG.
• DCorrect. Moments total 157,250 in-lb; 157,250 ÷ 1,910 ≈ 82.3 inches.

Answer: D) Fluid lines below the wiring

• AIncorrect. Separation and routing reduce fire and short risks.
• BIncorrect. A leak would then drip onto the wiring.
• CIncorrect. Wiring should not be clamped directly to fluid lines.
• DCorrect. Routing lines below wiring keeps any leak from dripping onto wires.

Answer: B) High-strength alloy core with thin layers of pure aluminum bonded on

Alclad is a high-strength aluminum alloy sheet clad with thin surface layers of pure aluminum, which resist corrosion. Anodizing, chromate conversion coatings and heat-treat tempers are different things.

• AIncorrect. Anodizing is an electrolytic process that builds an oxide film on the surface. It does not bond a separate metal layer to the sheet.
• BCorrect. In Alclad, thin layers of pure aluminum are bonded to the surfaces of a high-strength alloy core. The pure aluminum resists corrosion and protects the core.
• CIncorrect. A chromate conversion coating, such as Alodine, is a chemical surface film. It is not a metallurgically bonded layer of pure aluminum.
• DIncorrect. This describes a heat-treat temper condition (for example, -T6), not cladding. Alclad and bare sheet can both come in heat-treated tempers.

Answer: B) Blue

Avgas grades are identified by dye color: 80 is red, 100 is green and 100LL is blue. Jet fuel is clear to straw colored.

• AIncorrect. Green is the dye for grade 100 (formerly 100/130) avgas, which has a higher lead content than 100LL.
• BCorrect. Grade 100LL (low lead) aviation gasoline is dyed blue for identification.
• CIncorrect. Red is the dye for grade 80 (formerly 80/87) avgas.
• DIncorrect. Kerosene-type jet fuel (Jet A, Jet A-1) is undyed and looks clear to straw colored. A sample this color from a 100LL tank points to jet fuel contamination or misfueling.

Answer: C) When the tires are cool, before flight

• AIncorrect. Tires should be checked often, such as daily.
• BIncorrect. Hot tires show higher pressure.
• CCorrect. Hot tires read high and give misleading pressures.
• DIncorrect. Regular checks are needed.

Answer: A) Treat the area with a chromic acid or chemical conversion solution, then restore the protective paint as soon as the surface dries

After corrosion is removed from magnesium, the area gets a chromic acid or chemical conversion treatment, and the protective finish is restored as soon as it dries, because bare magnesium corrodes rapidly.

• ACorrect. Bare magnesium corrodes quickly. A chemical conversion treatment, followed promptly by the original protective finish, restores corrosion protection.
• BIncorrect. Steel particles become embedded in the magnesium and cause galvanic corrosion, and wax is not an acceptable replacement for the protective finish.
• CIncorrect. The natural oxide film on magnesium does not protect it. Bare magnesium keeps corroding quickly, so the finish must be restored promptly.
• DIncorrect. Neutralizing alone gives no lasting protection. Magnesium always needs a conversion coating and a protective finish.

Answer: D) Positive 24

• AIncorrect. Nonzero numbers multiplied together are not zero.
• BIncorrect. That is the sum, not the product.
• CIncorrect. That is a difference of magnitudes, not a product.
• DCorrect. Multiplying two negative numbers gives a positive result.

Answer: B) 30 days

• AIncorrect. The deadline is shorter.
• BCorrect. The FAA must be notified in writing within 30 days of the change.
• CIncorrect. The rule allows 30 days.
• DIncorrect. Notice is required.

Answer: C) It increases with depth

• AIncorrect. Pressure rises with depth.
• BIncorrect. Deeper fluid has more fluid above it.
• CCorrect. Pressure depends on the weight of fluid above.
• DIncorrect. Pressure is highest at the bottom.

Answer: C) By the size of a ball indentation under load

• AIncorrect. That is tap testing.
• BIncorrect. Color is not a hardness test.
• CCorrect. A larger indentation means a softer material.
• DIncorrect. Conductivity testing is different.

Answer: A) Getting adequate recovery sleep

• ACorrect. Only sleep pays back accumulated sleep debt.
• BIncorrect. Caffeine masks fatigue temporarily.
• CIncorrect. That worsens fatigue.
• DIncorrect. Light helps briefly but doesn't fix sleep debt.