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Fuel-Air Cycle Analysis Quiz

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Questions and Answers

How does the specific heat at constant pressure (cp) change with an increase in temperature?

It increases for all gases, except monoatomic gases (correct)

It increases for monoatomic gases, but decreases for other gases

It remains constant for all gases

It decreases for all gases, except monoatomic gases

What is the effect of dissociation at high temperatures on the maximum temperature obtained?

The maximum temperature is reduced by about 300 K (correct)

The maximum temperature is increased by about 1000 K

The maximum temperature is increased by about 300 K

The maximum temperature remains unchanged

How does the number of molecules present in the cylinder after combustion vary?

It depends only on the pressure and temperature

It depends only on the fuel/air ratio

It depends on the completeness of the reaction, but not on the composition of the fuel

It depends on the fuel/air ratio, pressure, temperature, and completeness of the reaction (correct)

How are the values of temperature and pressure at the end of compression affected by the variation of specific heat during the compression stroke?

Temperature increases and pressure decreases Signup and view all the answers

What is the relationship between specific heat at constant volume (cv) and specific heat at constant pressure (cp)?

cv is equal to cp minus a constant value Signup and view all the answers

What is the main purpose of the fuel-air cycle analysis?

To simplify the analysis of the actual engine cycle Signup and view all the answers

Why is the analysis of the fuel-air cycle considered very complicated?

Because it involves considering a mixture of air, fuel, and residual gases Signup and view all the answers

What can the fuel-air cycle predict closely in relation to air/fuel ratio?

The effect on engine design and material selection Signup and view all the answers

What is considered as the working fluid in the analysis of the fuel-air cycle?

Mixture of air, fuel, and residual gases Signup and view all the answers

What factors can be taken into consideration in fuel-air cycle calculations?

The actual composition of cylinder gases and combustion products Signup and view all the answers