If a fluid expands suddenly into vacuum through an orifice of large dimension, then such a process is called___________________?

Related Mcqs:

1. If value of n is infinitely large in a polytropic process pV” = C, then the process is known as constant_____________________?

   A. volume
   B. pressure
   C. temperature
   D. enthalpy
   E. entropy

2. The condition of perfect vacuum, i.e., absolute zero pressure can be attained at ____________________?

   A. a temperature of – 273.16°C
   B. a temperature of 0°C
   C. a temperature of 273 °K
   D. a negative pressure and 0°C temperature
   E. can’t be attained

3. Work done in a free expansion process is___________________?

   A. + ve
   B. -ve
   C. zero
   D. maximum
   E. minimum

4. The value of n = 1 in the poly tropic process indicates it to be __________________?

   A. reversible process
   B. isothermal process
   C. adiabatic process
   D. irreversible process
   E. free expansion process

5. A heat exchange process in which the product of pressure and volume remains constant is known as_______________?

   A. heat exchange process
   B. throttling process
   C. isentropic process
   D. adiabatic process
   E. hyperbolic process

6. Isochoric process is one in which___________________?

   A. free expansion takes place
   B. very little mechanical work is done by the system
   C. no mechanical work is done by the system
   D. all parameters remain constant
   E. mass and energy transfer do not take place

7. In an isothermal process, the internal energy________________?

   A. increases
   B. decreases
   C. remains constant
   D. first increases and then decreases
   E. first decreases and then increases

8. For a thermodynamic process to be reversible, the temperature difference between hot body and working substance should be___________________?

   A. zero
   B. minimum
   D. maximum
   D. infinity
   E. there is no such criterion

9. If a gas vapour is allowed to expand through a very minute aperture, then such a process is known as__________________?

   A. free expansion
   B. hyperbolic expansion
   C. adiabatic expansion
   D. parabolic expansion
   E. throttling

10. Work done in an adiabatic process between a given pair of end states depends on__________________?

    A. the end states only
    B. particular adiabatic process
    C. the value of index n
    D. the value of heattransferred
    E. mass of the system