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

Related Mcqs:

1. A gas is compressed in a cylinder by a movable piston to a volume one-half its original volume. During the process 300 kJ heat left the gas and internal energy remained same. The work done on gas in Nm will be___________________?

   A. 300 Nm
   B. 300,000 Nm
   C. 30 Nm
   D. 3000 Nm
   E. 30,000 Nm

2. 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

3. An ideal gas as compared to a real gas at very high pressure occupies_________________?

   A. more volume
   B. less volume
   C. same volume
   D. unpredictable behaviour
   E. no such correlation

4. Universal gas constant is defined as equal to product of the molecular weight of the gas and_______________?

   A. specific heat at constant pressure
   B. specific heat at constant volume
   C. ratio of two specific heats
   D. gas constant
   E. unity.

5. Characteristic gas constant of a gas is equal to______________________?

   A. C/Cv
   B. Cv/Cp
   C. Cp – Cv
   D. Cp + Cv
   E. Cp x Cv

6. Which of the following can be regarded as gas so that gas laws could be applicable, within the commonly encountered temperature limits ?

   A. 02, N2, steam, C02
   B. Oz, N2, water vapour
   C. S02, NH3, C02, moisture
   D. 02, N2, H2, air
   E. steam vapours, H2, C02

7. Superheated vapour behaves___________________?

   A. exactly as gas
   B. as steam
   C. as ordinary vapour
   D. approximately as a gas
   E. as average of gas and vapour

8. In an isothermal process, the internal energy of gas molecules________________?

   A. increases
   B. decreases
   C. remains constant
   D. may increase/decrease depending on the properties of gas
   E. shows unpredictable behaviour

9. 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

10. Gas turbine cycle consists of___________________?

    A. two isothermals and two isentropics
    B. two isentropics and two constant volumes
    C. two isentropics, one constant volume and one constant pressure
    D. two isentropics and two constant pressures
    E. none of the above