What is the purpose of the ignition system? Explain how the chemical energy of the battery ultimately becomes mechanical energy of motion to move the vehicle.
Question 22
22.
What are the main differences in distributor ignition engines and electronic ignition engines?
What component in the ignition system steps up voltage?
battery
b. powertrain control module (computer)
c. ignition coil
d. spark plug
What type of grease is used in spark plug boot ends to inhibit corrosion?
dielectric
b. chassis
c. anti-seize
d. white lithium
Most automobiles have a ______ volt DC battery.
2
6
12
d.120
In a distributor ignition system, what rotates under the distributor cap to send the high voltage to each spark plug wire?
rotator
rotor
ring
rasp
Some electronic ignition systems eliminate the use of spark plug wires. What do they use to do this?
distributor cap
distributor rotor
coil-on-plug
ignition coils
What would be a reasonable gap setting for a spark plug?
0.0040” (0.1016 mm)
0.040” (1.016 mm)
0.400” (10.16 mm)
4.000” (101.6 mm)
What would be a reasonable voltage at the tip of a spark plug?
5 volts
12 volts
12,000 volts
150,000 volts
What keeps track of piston and valve positions in the engine to efficiently time the spark?
knock sensor
crankshaft and camshaft sensors
ignition module
ignition coil
Which of the following is NOT used to keep the crankshaft and camshaft synchronized?
timing clock
timing gears
timing belt
timing chain
What would be a common timing belt replacement interval?
every 1,000 miles
every 10,000 miles
every 100,000 miles
every 1,000,000 miles
What type of engine could result in a bent valve and piston damage from a timing component breaking?
an interference engine
a non-interference engine
an inline 4 cylinder engine
a turbocharged engine
Which of the following would NOT impact the life of a timing belt?
extreme temperatures
stop and go traffic
worn tensioner
worn timing chain
It is usually recommended to replace the whole timing belt system at the service interval. Which of the following is NOT one of those components commonly replaced at this interval?
a. timing belt
b. camshaft sensor
c. idler
d. tensioner
In a coil, the ____________ winding is low voltage.
a. primary
b. secondary
c. third
d. fourth
What is sometimes used on the threads of the spark plug?
a. dielectric grease
b. chassis grease
c. anti-seize compound
d. white lithium grease
Technician A says that most new cars have electronic ignition systems. Technician B says that crankshaft and camshaft sensors are used with electronic ignition systems. Who is correct?
a. Technician A
b. Technician B
c. Both Technician A and Technician B
d. Neither Technician A nor Technician B
Technician A says that most car batteries are 6 volts. Technician B says that about 50% of new cars have 6 volt systems while 50% have 12 volt systems. Who is correct?
a. Technician A
b. Technician B
c. Both Technician A and Technician B
d. Neither Technician A nor Technician B
Technician A says that all automobiles only have one ignition coil. Technician B says that some automobiles have one coil per cylinder. Who is correct?
a. Technician A
b. Technician B
c. Both Technician A and Technician B
d. Neither Technician A nor Technician B
Technician A says that diesel engines do not have spark plugs. Technician B says that diesel engines use two spark plugs for each cylinder due to the high energy content of the diesel fuel. Who is correct?
a. Technician A
b. Technician B
c. Both Technician A and Technician B
d. Neither Technician A nor Technician B
Technician A says that when changing the spark plug wires on a distributor ignition vehicle it is essential not to mix up the firing order. Technician B says that it is important to route the wires away from the exhaust manifold to prevent the wires from burning. Who is correct?