Exam (elaborations)
Ignition system Questions and Answers 2024
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Exam of 7 pages for the course Pa emission at Pa emission (Ignition system)
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Ignition systemThe ________ connect the coil to the distributor cap center terminal and the distributor
cap side terminals to the terminals on the top of the spark plugs. - answer High tension
leads
A ________ shows all the cylinders firing in sequence. - answer Parade pattern
Finding breakdowns in coil insulation requires the coil to be activated and the available
voltage to be measured on a(n) ________ and compared to specifications. – answer O-
scope
Tech A says that a lambda greater than 1 means the engine is running rich. Tech B
says that the amount of oxygen in the exhaust indicates how rich or lean the mixture is.
Who is correct? - answerTech B
Because the value of the self-induced voltage in the ________ is also influenced by the
rate of collapse of the magnetic field, which is determined by the rate of change of the
current flow through the coil, it is essential that the ______ be switched off as quickly as
possible. - answerPrimary winding;primary current
As the stationary winding of induction-type systems is influenced by the magnetic field,
a ________ is induced in the winding each time the ________ changes. -
answerVoltage, magnetic field
Tech A states that modern vehicles make use of a distributor to create the spark. Tech
B states that modern vehicles no longer use a distributor. Who is correct? - answerTech
B
The power train control module (PCM) must control a high-current fuel pump. The best
actuator to use would be a: - answerRelay
Ignition systems operate according to the laws of induction observed by: -
answerFaraday
Tech A says that the positive side of the coil primary circuit is switched. Tech B says
that the negative side of the coil primary circuit is switched. Who is correct? -
answerTech B
If the reach is too ________, the piston may strike the spark plug while moving up. -
answerLong
, Tech A says that spark ignition typically occurs before TDC. Tech B says that spark
ignition typically occurs after TDC. Who is correct? - answerTech A
Which component of the contact breaker point ignition system provides the driver
control over system operation? - answerThe ignition switch
Tech A says that spark plug heat range is how much heat spark plugs can physically
handle. Tech B says using the wrong heat range plug can result in spark plug damage.
Who is correct? - answerNOT both
The ________ steps up the low voltage in the primary circuit to the high voltage in the
secondary circuit. - answerInduction coil
The condition in which the magnetic field is completely built is called coil ________.
Select one: - answerSaturation
Older ignition systems used a mechanical advance that was typically controlled by: -
answerNOT breaker plates
If there is no power to the ________ side and/or no switching at the ________ side, the
ignition coil or primary wiring may be defective. - answerPositive:negative
In electronic ignition systems, a(n) __________ uses a power transistor to turn the
primary circuit on and off. - answerIgnition module
Tech A says that coil-on-plug ignition systems use one coil to fire two cylinders. Tech B
says that you should twist spark plug boots before removing them. Who is correct? -
answerTech B
Manufacturers design their ignition systems to have an amount of ________ above the
________ so that misfire is prevented.
Select one: - answerReserve voltage; required voltage
If an engine cranks but will not start, the crankshaft and camshaft positions should be
tested before performing a spark test. - answerFalse
A(n) ________ system was a mechanical ignition system with a switch, called contact
breaker points. - answerContact breaker point ignition
A low firing line indicates low resistance, a short in the circuit, or low compression. -
answerTrue
Spark plugs either use a ________ design or a washer type of gasket to form a seal
between the spark plug and the cylinder head. - answerTaper
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