An open system is one in which____________________?

Related Mcqs:

1. A diathermic wall is one which____________________?

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

2. 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

3. 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

4. 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

5. 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

6. 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

7. An engine operates between temperatures of 900°Kandr2 and another engine between T2 and 400°K For both to do equal work, value of T2 will be________________?

   A. 650°K
   B. 600°K
   C. 625°K
   D. 700°K
   E. 750°K

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

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

9. Extensive property of a system is one whose value______________________?

   A. depends on the mass of the system like volume
   B. does not depend on the mass of the system, like temperature, pressure, etc.
   C. is not dependent on the path followed but on the state
   D. is dependent on the path followed and not on the state
   E. is always constant

10. According to kinetic theory of gases, the absolute zero temperature is attained when___________________?

    A. volume of the gas is zero
    B. pressure of the gas is zero
    C. kinetic energy of the molecules is zero
    D. specific heat of gas is zero
    E. mass is zero