Functions of an Air Induction System

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What happens to the volume of air able to enter the cylinder as the engine operating speed increases?

It is increased

It fluctuates

It is reduced (correct)

It remains the same

How does air humidity affect the amount of air in the cylinder?

It varies

It increases

It decreases (correct)

It has no effect

What effect does hot air have on the number of air molecules available to enter the cylinder?

Temperature has no effect on air molecules

Air molecules become denser

More air molecules are available

Fewer air molecules are available (correct)

How does operating altitude impact the number of air molecules in a given volume of air?

It decreases Signup and view all the answers

What effect does poor sealing due to cylinder liners and piston ring condition have on low pressure creation in the engine?

Significant low pressure cannot be created Signup and view all the answers

How do dirty air filters and bent tubing affect airflow into the engine?

They restrict airflow Signup and view all the answers

What is the typical volumetric efficiency range for naturally aspirated engines?

75% to 85% Signup and view all the answers

How does forcing air into cylinders under pressure affect volumetric efficiency?

Increases to over 100% Signup and view all the answers

What is indicated if an engine and turbocharger arrangement show 110% volumetric efficiency?

High efficiency system Signup and view all the answers

What is the main purpose of an air induction system?

To clean the air supply Signup and view all the answers

Which component is NOT typically part of an air induction system?

Exhaust pipe Signup and view all the answers

What does the air induction system NOT provide for combustion purposes?

Hot air Signup and view all the answers

Which function is NOT performed by an air induction system?

Heating the air supply Signup and view all the answers

Which component is crucial for monitoring air inlet restriction in an air induction system?

Air shutdown device Signup and view all the answers

What does a dust ejection system in an air induction system primarily help with?

Eliminating dirt and particles from the filter Signup and view all the answers

In what scenario would extra airflow be required in an engine with an air induction system?

When operating at high altitudes Signup and view all the answers

How does an air induction system contribute to engine efficiency?

By providing optimal fuel-to-air ratio Signup and view all the answers

What component is essential for supplying a constant source of cool, clean air to the engine in an air induction system?

Air filter(s) Signup and view all the answers

Which component in an air induction system is responsible for preventing contaminants from entering the engine?

Pre-cleaner(s) Signup and view all the answers

What is the purpose of an air silencer in an air filtering device?

Eliminate or reduce unpleasant noises Signup and view all the answers

Why is it important for the air induction system to provide the necessary air for combustion?

To enable complete combustion of fuel Signup and view all the answers

How do newer engines compensate for a restricted air supply?

By reducing fuel delivery Signup and view all the answers

What is the main reason for cooling the inlet air in an engine?

To increase air density and engine performance Signup and view all the answers

Why are blowers typically used in supplying additional air for scavenging purposes in engines?

To remove burnt exhaust gases and supply fresh air Signup and view all the answers

What determines the amount of air drawn into a cylinder of a naturally aspirated engine?

Low pressure created by the piston and atmospheric pressure Signup and view all the answers

What is the volumetric efficiency range of a naturally aspirated engine in good mechanical condition?

~75% - 85% Signup and view all the answers