An oxygen sensor is a component of what engine system?

Cooling system
Oil lubrication system
Exhaust system
Fuel system

An oxygen sensor is used to monitor unburned oxygen in the exhaust as the exhaust leaves the engine.

True or False: Because a diesel engine is a compression ignition engine, it is always a two-stroke design.

True
False

False. Diesel engines have been produced for decades in both 2-stroke and 4-stroke designs

Which of these components is not found in an automatic transmission?

Sun gear
Planetary gear
Spider Gear
Ring gear

Spider gears are found in differential units, not transmissions

True or False; In a vehicle suspension system, there is sprung weight and unsprung weight. Wheels and tires are considered unsprung weight.

True
False

The weight of wheels, tires, and brake assemblies is defined as “unsprung weight” as it is not cushioned by the suspension springs.