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Thermodynamic Cycles of Internal Combustion Engines

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Thermodynamic Cycles of Internal Combustion Engines

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Questions and Answers

Which category of thermodynamic cycles includes power cycles that produce a net power output?

Vapor cycles

Heat pump cycles

Gas cycles (correct)

Refrigeration cycles

What are the two principal types of internal combustion engines commonly used in automobiles?

Otto engines and Joule engines

Diesel engines and Gas turbines

Spark-ignition engines and Compression-ignition engines (correct)

Spark-ignition engines and Gas turbines

Which process can be applied instantaneously in internal combustion engine cycles if desired?

Expansion and compression

Reversible and adiabatic compressions

Reversible and adiabatic expansions

Heating of the working substance (correct)

What type of cycle do internal combustion engines and gas turbines undergo?

Gas power cycle Signup and view all the answers

Which of the following is NOT an example of a thermodynamic cycle mentioned in the text?

Rankine cycle Signup and view all the answers

What is used as the carrier for heat energy in thermodynamic cycles?

Working substance Signup and view all the answers

What are the properties that define the state of a working substance (WS)?

Pressure, volume, temperature, internal energy Signup and view all the answers

In a spark-ignition engine, what ignites the fuel-air mixture?

Spark plug Signup and view all the answers

What is the purpose of the compression stroke in a four-stroke combustion cycle?

To compress the fuel-air mixture Signup and view all the answers

What happens during the combustion stroke in the four-stroke cycle of an engine?

Fuel is ignited by a spark plug Signup and view all the answers

Why is a spark-ignition (SI) engine suitable for use in automobiles?

Because it is relatively light and lower in cost Signup and view all the answers

What assumption is made about the operation of an internal combustion engine based on the air-standard assumption?

It operates on an open cycle system Signup and view all the answers