QUESTION 3 For a steady state system which one of the foilowing statements is in

Question

QUESTION 3 For a steady state system which one of the foilowing statements is incorect? As the area increases ether velocity or density or both has to decrease @ At constant area f velocity increases, density increases to0 a At constant velocity density changes nversely with cross sesetional area As the velocity goes up ether density or area or both has to go down As the density goes up either ve ocity or cross sectional area has to increase At constant density f velocity increases Area has to decrease QUESTION 4 There are four distinct events that occur in the Camor cycle The second process allows delivery of work, B The process is reversible The process is isothermal D The process is adiabatic The process is quasi-statistical Pressure we increase Volume wil increase QUESTION 5 Which one of the following is an implic ation of Camot cycle All natural processes are irreversible An natural processes are most efficient None of the natural processes is efficient Carrot engine is the least efficient engine Carnot engine has a 100% efficiency An (ngne with reversible and ireversible processes cannot exceed the efficiency of a Carnot engine All heat engines using reversible processes between same cold and same hot sources will have same efficiency QUESTION6 What kind of a system is a block moving under a force on a plane that has friction? o Reversible process O Reversible system O Reversible environment o Irreversible system DOLL

Explanation / Answer

3.

At constant area, if velocity increases density increases too.

mass flow rate is the product of density, velocity and cross section area. If one of the parameters is kept constant, the other parameters are inversely proportional to each other.

4.

the process is reversible. the process is adiabatic.

In carnot cycle, the work is done on the surroundings in a reversible adiabatic process.

5.

an engine with reversible and irreversible processes cannot exceed the efficiency of carnot engine.

This is due to the reason that the carnot cycle is a theoritical cycle. It doesn't consider the friction and other losses during a cycle.

6.

irreversible system.

Due to the friction, some amount of energy is lost in terms of heat.

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