Which one is true for a throttling process ?

Related Mcqs:

1. Joule-Thomson effect i.e., a throttling process is a constant _____________ process?

   A. Entropy
   B. Temperature
   C. Internal energy
   D. Enthalpy

2. Throttling process is a/an _____________ process?

   A. Reversible and isothermal
   B. Irreversible and constant enthalpy
   C. Reversible and constant entropy
   D. Reversible and constant enthalpy

3. Throttling (Joule-Thomson effect) process is a constant _____________ process?

   A. Enthalpy
   B. Entropy
   C. Pressure
   D. None of these

4. The adiabatic throttling process of a perfect gas is one of constant enthalpy_________________?

   A. In which there is a temperature drop
   B. Which is exemplified by a non-steady flow expansion
   C. Which can be performed in a pipe with a constriction
   D. In which there is an increase in temperature

5. The value of Joule-Thomson co-efficient, in case where cooling occurs after the throttling process is________________?

   A. 0
   B. ∞
   C. +ve
   D. -ve

6. All gases except ____________ shows a cooling effect during throttling process at atmospheric temperature and pressure?

   A. Oxygen
   B. Nitrogen
   C. Air
   D. Hydrogen

7. All gases during throttling process at atmospheric temperature and pressure show a cooling effect except__________________?

   A. CO2
   B. H2
   C. O2
   D. N2

8. All gases above its inversion temperature, in a throttling process will show__________________?

   A. A heating effect
   B. No change in temperature
   C. A cooling effect
   D. Either A. or (C)

9. After throttling, gas temperature___________________?

   A. Decreases
   B. Increases
   C. Remain same
   D. May increase or decrease; depends on the nature of the gas

10. ________________ decreases during adiabatic throttling of a perfect gas?

    A. Entropy
    B. Temperature
    C. Enthalpy
    D. Pressure