In a reversible 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. 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

3. 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

4. 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)

5. Which of the following is not a reversible process ?

   A. Expansion of an ideal gas against constant pressure
   B. Atmospheric pressure vaporisation of water at 100°C
   C. Solution of NaCl in water at 50°C
   D. None of these

6. For an isothermal reversible compression of an ideal gas_______________?

   A. Only ΔE = 0
   B. Only ΔH =0
   C. ΔE = ΔH = 0
   D. dQ = dE

7. During a reversible isothermal expansion of an ideal gas, the entropy change is_________________?

   A. +ve
   B. 0
   C. -ve
   D. ∞

8. In the equation PVn = constant, if the value of n = y = Cp/Cv, then it represents a reversible ______________ process?

   A. Isothermal
   B. Adiabatic
   C. Isentropic
   D. Polytropic

9. What happens in a reversible adiabatic expansion process ?

   A. Heating takes place
   B. Cooling takes place
   C. Pressure is constant
   D. Temperature is constant

10. 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