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Rags and paper left in induction intakes

Aviation Mechanic Powerplant (AMP) practice question 2 of 13 on Reciprocating Engine Induction and Cooling Systems. ACS element AM.III.J.R2 · difficulty: standard. Want to answer it in a timed quiz? Use the Aviation Mechanic Powerplant (AMP) practice mode.

Question bank updated 2026-09-22

QUESTIONWhy must pieces of rag and paper be kept out of the air intakes and ducts during induction system maintenance?

  1. AThey can absorb fuel and start an intake fire
  2. BThey can soak up the oil film on the filter
  3. CThey can restrict the airflow to the engine
Show the answer and explanation

Correct answer: C. They can restrict the airflow to the engine

  • A — incorrect The stated hazard is restricted airflow, not ignition of the debris.
  • B — incorrect The oil film is a filter servicing matter; loose debris in the intake is a restriction problem.
  • C — correct The induction system must be kept clean at all times, since pieces of rags or paper can restrict the airflow if allowed to enter the air intakes or ducts.

BACKGROUND

The induction system should be checked for cracks and leaks during all regularly scheduled engine inspections, and the units of the system should be checked for security of mounting. The system must be kept clean at all times, since pieces of rags or paper can restrict the airflow if they are allowed to enter the air intakes or ducts. Loose bolts and nuts can cause serious damage if they pass into the engine. On systems with a carburetor air filter, the filter is checked regularly and cleaned or replaced when dirty. If the induction system air filter becomes excessively dirty, it causes a loss of power or the engine will not start.

STUDY TIP

Treat every rag, cap, and fastener as a countable item during induction work, and account for all of them before closing the system.

KEY POINTS

  • Rags and paper in the intakes or ducts restrict airflow to the engine.
  • Loose bolts and nuts can cause serious damage if they pass into the engine.
  • An excessively dirty air filter causes power loss or a no-start condition.

SOURCES

  • amp-powerplant/ch03.txt "Induction System Inspection & Maintenance"
Practice the Aviation Mechanic Powerplant (AMP) test →Timed 100-question exam, by ACS area, or review your misses. Free.
MORE ON RECIPROCATING ENGINE INDUCTION AND COOLING SYSTEMS

SkyDrill is not affiliated with the FAA. This is an original practice item based on FAA-H-8083-32B Aviation Maintenance Technician Handbook – Powerplant, and 14 CFR part 43. Regulations and handbooks are revised; confirm details against the current edition.