Ignition System Section E

T or F Aircraft engines are required to have dual ignition?

True

A magneto is actually self-contained _______ current generator

Alternating

Currently manufactured, certificated, reciprocating engines will use the _____ tension magneto ignition

High

What kind of magneto ignition system was developed to prevent high voltage breakdown in the distributor when the aircraft is flying at high altitudes?

low-tension

Dual magnetos contain two separate and independent systems but share the following components:

Housing
Rotating Magnet
Cam

The four basic systems in a rotating-magnet magneto are:

Mechanical
Magnetic
Primary electrical
Secondary electrical

An 18-cylinder radial engine using a low-tension magneto ignition system will have _____ high-tension transformers.

36

Two methods of mounting a magneto to an aircraft engine are by:

Base mount
Flange mount

The pole shoes in a magneto are made of _______ ________

laminated steel

When the magnet is in its full-register position, the ______ number of lines of magnetic flux are passing through the coil core.

maximum

The greatest change in the number of lines of magnetic flux in the coil core takes place when the magnet is in its ______ position

neutral

The magnetic field produced by current flowing in the primary coil _____ the magnetic field that caused it to flow

opposes

Because of the magnetic field produced by the primary current, the greatest change in the total magnetic flux occurs _____ the magnet passes its neutral position

after

The breaker points in a magneto are closed when the rotating magnet is in its _____ position

full-register

The point at which the breaker points open is called the ____ angle

E-gap

Two functions of a capacitor in a modern magneto are:
A. To minimize _________. for this function the capacitor is in parallel with the breaker points.
B. To minimize _______ _______. For this function the capacitor is in series between the brake points and the ignition switch.

point arcing
electromagnetic radiation

The high-tension magneto uses a _______ distributor.

built-in

Which winding in a magneto coil has the greater number of turns, the primary or secondary winding?

Secondary

The distributor in a magneto is in the _______ electrical circuit

secondary

The vast majority of four- and six cylinder horizontally opposed engines use a/an _______ to produce a hot and late spark for starting.

impulse coupling

Magnetos have the problem of not producing a hot enough spark when they turn too ______

slow

Four methods of providing a hot spark for starting an aircraft engine are:

Booster magneto
Induction vibrator
Shower of sparks system
Impulse coupling

The Bendix ______ is a modern version of the induction vibrator.

Shower of sparks

The extra set of breaker points used used with the "shower of spark" system are referred to as the ____ points

retard

On an engine equipped with the "shower "shower of sparks" system, the _____ magneto is of standard construction.

right

An engine equipped with the "shower of sparks" system will use only the ______ magneto for starting

left

The "shower of sparks" will jump across the spark plug only as long as which condition exist? (A,B or C)
A. the retard points are open
B. the advance points are open
C. Both

C

The rotating magnet in a Stick Electro magneto is in its _____ position when the timing pin can slip through the hole in the housing and the rotating magnet shaft.

E-gap

You can be sure that breaker points will close at the correct position of the rotating magnet if their ______ _______ is correct.

maximum opening

Magneto-to-engine timing is accomplished using the firing position of cylinder number ______ as the reference

1

The impulse coupling _________ be engaged when timing the magneto to the engine

should not

A ________ _________ is used to show exactly the time at which the breaker points open.

timing light

Close timing of a base-mounted magneto to an aircraft engine is permitted by using a _______ ______

vernier coupling

Wear of the breaker points will cause the timing of a magneto to drift ________

early

35.) the engine analyzer is an adaption of the laboratory _____________

Oscilloscope

36 Ignition leads are usually made of _______ ________ or __________ __________ wire, enclosed in a rubber silicon insulation

stranded copper, stainless steel

37 modern ignition harnesses are available with terminal endsto fit either the standard __________ shielded spark plug or the ________ all-weather spark plug

5/8-24, 3/4-20

38 The __________ caused by shielding of ignition leads causes excessive electrode erosion around the ignition leads

capacitance

39 The _________ in a spark plug is installed to minimize electrode electrode erosion caused by using shielded ignition leads

resistor

40 the length of the shell threads on a spark plug is called the __________ of the spark plug

reach

41 a short reach spark plug has______ -inch of threads on its shell, and a long reach plug has __________ -inch of threads

1/2. 13/16

42 a spark plug that has a long nose core insulator is a _____ spark plug

hot

43 a _______ spark plug should be used in high compression engine

cold

44 an engine operating with a too _____ idle mixture will cause the spark plugs to have black sooty deposits in their firing end cavity

rich

45 hard bead like deposits found in the firing end of the spark plug indicate that the plug has been subject to ______ _______

lead fouling

46 lead fouling may occur on a spark plug that is too ______ for the engine operating conditions

cold

47 Two sources of oil that can cause the spark plug fouling are:
a.)____________
b.)____________

A. Broken piston ring
B. Worn valve guides

48 a spark plug should not be allowed to wear away more than ________ of its electrode dimension before it is discarded.

1/2

49 severe erosion on both the center electrode and the ground electrode may indicate _______ __________ ________ problems

fuel metering

50 lead deposits in the firing end cavity of a spark plug should be removed with a ___________ cleaning tool

vibrator

51 it ____ recommended that the spark plug gap be widened if it has been inadvertently closed too much

is not

52 the spark plug that is removed from the cylinder number 1, bottom, should be replaced in cylinder number ______ , ________, if the firing order is 1-6-3-2-5-4

6, top

53 thread lubricant should be placed on the ______ thread from the end of the shell when installing a spark plug in an engine

second

54 the lead terminal of a spark plug harness should be wiped with a cloth dampened with __________ or ________ before it is installed in the spark plug

acetone, M.E.K.