Basics of Thermodynamic Air cycles

Otto cycle is also called as

• Constant temperature process

• Constant pressure process

• Constant volume process

• None of the above

The ideal thermodynamic cycle is called

• the Otto cycle

• the Carnot cycle

• the Rankine cycle

• the Diesel cycle

This type of cycle is used in four stroke compression ignition engines

• Carnot cycle
• Brayton cycle
• Rankine cycle
• Diesel cycle

The work available in a Carnot cycle is equal to 

• the area under the high temperature curve
• the area under the low temperature curve
• the area above the low temperature curve and below the high temperature curve

All processes in a Carnot cycle must be reversible. As a result, a Carnot engine must operate ... 

• at a low temperature
• very slowly
• at high temperature
• both forward and backward

The first law of thermodynamics states that the change in the internal energy of a system is equal to the difference in energy transferred to or from the system as heat and

• mass
• work done
• force
• pressure

Which best describes ENTROPY?

• Useful heat energy needed to drive an engine
• Heat that can be stored to be used at a later date
•   Random energy that escapes from the system
• A state of order in a physical system

Which statement is true about the ENTROPY?

• Entropy refers to DISORDER, the unusable energy that escapes a system.
• Entropy refers to the balance of temperature among two or more systems.
• Entropy refers to the average kinetic energy of the molecules.
• Entropy refers to the inability to destroy or create energy. 

As a system becomes more disordered, entropy

• remains the same
• increases
• decreases
• cannot be determined

The first law of thermodynamics is a restatement of the

• Zeroth law of thermodynamics
• law of heat addition
• principle of entropy
• conservation of energy