AVM Ignition Systems Test 1
questions & correct answers
The magnetic circuit of a magneto consists of a permanent multi-pole rotating magnet. the core
is made of - correct answer ✔✔ Soft Iron
How is the strength of a magneto magnet checked - correct answer ✔✔ Hold the points open
and check the output of the primary coil with an ac ammeter while operating the magneto at a
specified speed.
The E-gap angle is usually defined as the number of degrees between the neutral position of the
rotating magnet and the position - correct answer ✔✔ Where the contact points close
The greatest density of flux lines in the magnetic circuit of a rotating magnet-type magneto
occurs when the magnet is in what position - correct answer ✔✔ Full alignment with the field
shoe faces
What will be the results of increasing the gap of breaker points in a magneto - correct answer
✔✔ Advance the spark and decrease its intensity
When internally timing a magneto, the breaker points begin to open when the rotating magnet
is - correct answer ✔✔ A few degrees past the neutral position
Magneto timing drift is caused by erosion of the breaker points and - correct answer ✔✔ Wear
of the cam followers
What is the electrical location of the primary capacitor in a high-tension magneto - correct
answer ✔✔ In parallel with the breaker points
, In a high-tension ignition system, the current in the magneto secondary winding is - correct
answer ✔✔ Induced when the primary circuit is interrupted
What is the radial location of the two north poles of a four-pole rotating magnet in a high
tension magneto - correct answer ✔✔ 180 degrees apart
Magneto pole shoes are generally made of - correct answer ✔✔ laminations of high-grade soft
iron.
What components make up the magnetic system of a magneto? - correct answer ✔✔ Rotating
magnet, the pole shoes, the pole shoe extensions, and the coil core
In an aircraft ignition system, one of the functions of the capacitor is to - correct answer ✔✔
Facilitate a more rapid collapse of the magnetic field in the primary coil
When will the voltage in the secondary winding of a magneto, installed on a normally operating
engine, be at its highest value? - correct answer ✔✔ Just prior to spark plug firing
When the switch is off in a battery ignition system, the primary circuit is - correct answer ✔✔
Opened
As an aircraft engine speed is increased, the voltage induced in the primary coil of the magneto
- correct answer ✔✔ Increases
When internally timing a magneto, the breaker points begin to open when - correct answer ✔✔
The magnet poles are a few degrees beyond the neutral position
questions & correct answers
The magnetic circuit of a magneto consists of a permanent multi-pole rotating magnet. the core
is made of - correct answer ✔✔ Soft Iron
How is the strength of a magneto magnet checked - correct answer ✔✔ Hold the points open
and check the output of the primary coil with an ac ammeter while operating the magneto at a
specified speed.
The E-gap angle is usually defined as the number of degrees between the neutral position of the
rotating magnet and the position - correct answer ✔✔ Where the contact points close
The greatest density of flux lines in the magnetic circuit of a rotating magnet-type magneto
occurs when the magnet is in what position - correct answer ✔✔ Full alignment with the field
shoe faces
What will be the results of increasing the gap of breaker points in a magneto - correct answer
✔✔ Advance the spark and decrease its intensity
When internally timing a magneto, the breaker points begin to open when the rotating magnet
is - correct answer ✔✔ A few degrees past the neutral position
Magneto timing drift is caused by erosion of the breaker points and - correct answer ✔✔ Wear
of the cam followers
What is the electrical location of the primary capacitor in a high-tension magneto - correct
answer ✔✔ In parallel with the breaker points
, In a high-tension ignition system, the current in the magneto secondary winding is - correct
answer ✔✔ Induced when the primary circuit is interrupted
What is the radial location of the two north poles of a four-pole rotating magnet in a high
tension magneto - correct answer ✔✔ 180 degrees apart
Magneto pole shoes are generally made of - correct answer ✔✔ laminations of high-grade soft
iron.
What components make up the magnetic system of a magneto? - correct answer ✔✔ Rotating
magnet, the pole shoes, the pole shoe extensions, and the coil core
In an aircraft ignition system, one of the functions of the capacitor is to - correct answer ✔✔
Facilitate a more rapid collapse of the magnetic field in the primary coil
When will the voltage in the secondary winding of a magneto, installed on a normally operating
engine, be at its highest value? - correct answer ✔✔ Just prior to spark plug firing
When the switch is off in a battery ignition system, the primary circuit is - correct answer ✔✔
Opened
As an aircraft engine speed is increased, the voltage induced in the primary coil of the magneto
- correct answer ✔✔ Increases
When internally timing a magneto, the breaker points begin to open when - correct answer ✔✔
The magnet poles are a few degrees beyond the neutral position
