What happens in a reversible adiabatic expansion process ?

Related Mcqs:

1. On a P-V diagram of an ideal gas, suppose a reversible adiabatic line intersects a reversible isothermal line at point A. Then at a point A, the slope of the reversible adiabatic line (∂P/∂V)s and the slope of the reversible isothermal line (∂P/∂V)T are related as (where, y = Cp/Cv) ?

   A. (∂P/∂V)S = (∂P/∂V)T B. (∂P/∂V)S = [(∂P/∂V)T]Y C. (∂P/∂V)S = y(∂P/∂V)T D. (∂P/∂V)S = 1/y(∂P/∂V)T...

2. What happens in a reversible adiabatic compression ?

   A. Heating occurs B. Cooling occurs C. Pressure is constant D. Temperature is constant...

3. A system undergoes a change from a given initial state to a given final state either by an irreversible process or by a reversible process, then (where, Δ S1 and Δ SR are the entropy changes of the system for the irreversible and reversible processes respectively) ?

   A. Δ S1 is always Δ SR C. Δ S1 is always > Δ SR D. Δ S1 is always = Δ SR...

4. The expression for the work done for a reversible polytropic process can be used to obtain the expression for work done for all processes, except reversible _____________ process?

   A. Isobaric B. Isothermal C. Adiabatic D. None of these...

5. Air enters an adiabatic compressor at 300K. The exit temperature for a compression ratio of 3, assuming air to be an ideal gas (Y = Cp/Cv = 7/5) and the process to be reversible, is___________________?

   A. 300 × (32/7) B. 300 × (33/5) C. 300 × (333/7) D. 300 × (35/7)...

6. Entropy change in case of reversible adiabatic process is________________?

   A. Minimum B. Zero C. Maximum D. Indeterminate...

7. Specific heat of a gas for a reversible adiabatic process is________________?

   A. Negative B. Zero C. Infinity D. None of these...

8. Which of the following is not correct for a reversible adiabatic process ?

   A. TVγ-1 = constant B. p1-γ.TY = constant C. PVγ = constant D. None of these...

9. When a gas is subjected to adiabatic expansion, it gets cooled due to__________________?

   A. Decrease in velocity B. Decrease in temperature C. Decrease in kinetic energy D. Energy spent in doing work...

10. During adiabatic expansion of gas___________________?

    A. Pressure remains constant B. Pressure is increased C. Temperature remains constant D. None of these...