What is the standard atmospheric pressure at sea level, in inches of mercury?
ACS code: AM.G.PH.K1
Correct answer: 29.92 inHg
Rationale: ICAO standard sea-level pressure is 29.92 inHg (1013.25 hPa).
FAA General Written Test Prep
Free sample questions from the FAA Aviation Mechanic General knowledge test, each with a worked rationale and its ACS code.
- AM.G.PH.K1Tap an answer
What is the standard atmospheric pressure at sea level, in inches of mercury?
- AM.G.EL.K1Tap an answer
By Ohm's law, what voltage drives 2 amperes through a 6-ohm resistance?
- AM.G.WB.K1Tap an answer
An aircraft's center of gravity is the point at which the aircraft would:
- AM.I.ATap an answer
According to Ohm's law, what current flows in a circuit having a 12-volt source connected across a 6-ohm resistance?
- AM.I.ATap an answer
In a series circuit containing three resistors, how does the current compare at different points in the circuit?
By Ohm's law, what voltage drives 2 amperes through a 6-ohm resistance?
ACS code: AM.G.EL.K1
Correct answer: 12 volts
Rationale: E = I × R = 2 A × 6 Ω = 12 V.
An aircraft's center of gravity is the point at which the aircraft would:
ACS code: AM.G.WB.K1
Correct answer: balance if suspended
Rationale: The CG is the point about which the aircraft would balance if suspended.
According to Ohm's law, what current flows in a circuit having a 12-volt source connected across a 6-ohm resistance?
ACS code: AM.I.A
Correct answer: 2 amperes.
Rationale: Ohm's law states I = E/R. Dividing the 12-volt source by the 6-ohm resistance gives 12 / 6 = 2 amperes. The 18-ampere choice incorrectly adds voltage and resistance, and 72 amperes incorrectly multiplies them.
In a series circuit containing three resistors, how does the current compare at different points in the circuit?
ACS code: AM.I.A
Correct answer: It is the same through every resistor.
Rationale: A series circuit provides only one path for current flow, so the same current passes through every component. Voltage divides across the resistors in proportion to their values, but the current is identical at all points, as described for series circuits in the handbook.
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