Auto & Shop InformationQuestion 109 of 120
A spark plug is used to:
a.ignite the fuel-air mixture
b.cool the engine
c.filter the oil
d.charge the battery
Explanation
In a gasoline engine, the spark plug produces an electric spark that ignites the compressed fuel-air mixture in the cylinder. This controlled ignition powers the piston stroke.
Practice all 120 questions free — no signup required.
Related questions on this topic
- Which engine component converts the up-and-down motion of the pistons into rotating motion?
- What is the main purpose of engine oil?
- Which tool is best for measuring the gap of a spark plug?
- The part of the car that keeps the engine from overheating by circulating coolant is the:
- A Phillips screwdriver is designed to fit a screw head shaped like a:
- Which part of a car stores electrical energy to start the engine?
Last reviewed: · editorial process
Sen Lin, PrepPass Founder · Verified against ASVAB (Armed Services Vocational Aptitude Battery) · How we review