A diathermic wall is one which____________________? - PakMcqs

Related Mcqs:

1. An open system is one in which____________________?

   A. mass does not cross boundaries of the system, though energy may do so B. neither mass nor energy crosses the boundaries of the system C. both energy and mass cross the boundaries of the system D. mass crosses the boundary but not the energy E. thermodynamic reactions do not occur...

2. An adiabatic wall is one which__________________?

   A. prevents thermal interaction B. permits thermal interaction C. encourages thermal interaction D. discourages thermal interaction E. dos not exist....

3. An isolated system is one in which_____________________?

   A. mass does not cross boundaries of the system, though energy may do so B. neither mass nor energy crosses the boundaries of the system C. both energy and mass cross the boundaries of the system D. mass crosses the boundary but not the energy E. thermodynamic reactions do not occur...

4. The basis for measuring thermodynamic property of temperature is given by___________________?

   A. zeroth law of thermodynamics B. first law of thermodynamics C. second law of thermodynamics D. third law of thermodynamics E. Avogadro’s hypothesis...

5. 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...

6. Otto cycle consists of following four processes____________________?

   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 pres-sures E. none of the above...

7. The efficiency of Diesei cycle with decrease in cut off_________________?

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

8. Carnot cycle efficiency depends upon________________?

   A. properties of the medium/substance used B. condition of engine C. working condition D. temperature range of operation E. effectiveness of insulating material around the engine...

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. The statement that molecular weights of all gases occupy the same volume is known as________________?

    A. Avogadro’s hypothesis B. Dalton’s law C. Gas law D. Law of thermodynamics E. Joule’s law...