AFCT Auto and Shop Information: Automotive Systems 3

Question 1

What is the function of the oxygen sensor (O2 sensor) in a modern vehicle?

Accepted Answer

To monitor oxygen levels in the exhaust to help the engine computer adjust the air-fuel ratio

Answer

To measure the amount of oxygen in the fuel tank

Answer

To regulate the air conditioning system

Answer

To detect carbon monoxide inside the cabin

Question 2

What is the role of the differential in a rear-wheel-drive vehicle?

Accepted Answer

To allow the rear wheels to rotate at different speeds during turns

Answer

To shift between different gear ratios

Answer

To connect the engine to the transmission

Answer

To absorb road shock from uneven surfaces

Question 3

What happens when a vehicle's serpentine belt breaks while driving?

Accepted Answer

Multiple systems fail including the alternator, power steering pump, water pump, and AC compressor

Answer

Only the air conditioning stops working

Answer

The engine immediately shuts off

Answer

The transmission locks up

Question 4

What is the purpose of the mass airflow (MAF) sensor in a fuel-injected engine?

Accepted Answer

To measure the volume and density of air entering the engine

Answer

To measure the temperature of the fuel

Answer

To control the throttle position

Answer

To monitor exhaust backpressure

Question 5

What type of suspension system uses a single assembly containing the spring and shock absorber together?

Accepted Answer

MacPherson strut

Answer

Leaf spring suspension

Answer

Double wishbone suspension

Answer

Torsion bar suspension

Question 6

What is the function of the EGR (Exhaust Gas Recirculation) valve?

Accepted Answer

To recirculate a portion of exhaust gases back into the intake manifold to reduce nitrogen oxide emissions

Answer

To increase engine power output

Answer

To filter particulate matter from the exhaust

Answer

To regulate exhaust system backpressure for turbocharger performance