Test on Aircraft Ignition Systems
Aircraft Ignition Systems Explained: A Student's Guide
Test: Aircraft Ignition Systems
20 questions
Question 1: In a high-tension ignition system, high-tension transformers are located on the heads of each cylinder.
A. Ano
B. Ne
Explanation: In a low-tension ignition system, low voltage is distributed to high-tension transformers that are located on the heads of each cylinder. A high-tension magneto produces high voltage within the magneto coil itself.
Question 2: A high-tension magneto produces low voltage in its coil.
A. Ano
B. Ne
Explanation: A high-tension magneto produces high voltage in the magneto coil.
Question 3: A vernier coupling is used on base-mounted magnetos to allow the magneto to engine timing to be varied in increments of less than one degree.
A. Ano
B. Ne
Explanation: Magnetos that are base mounted must have a vernier coupling between the magneto drive and the engine. This vernier coupling allows the magneto to engine timing to be varied in increments of less than one degree.
Question 4: In engines with staggered ignition timing, the spark plug nearest the exhaust valve fires before the spark plug on the intake side.
A. Ano
B. Ne
Explanation: Engines in which the exhaust gas scavenging from the cylinders is uneven use staggered ignition timing. The spark plug nearest the exhaust valve, where the air-fuel mixture is diluted, fires before the spark plug on the intake side.
Question 5: The primary purpose of staggered timing in aircraft engines is to ensure that the spark plugs fire simultaneously.
A. Ano
B. Ne
Explanation: Staggered timing is used so that the flame front caused by the two spark plugs will meet in the center of the piston, leading to more even combustion, rather than firing simultaneously.