First law of thermodynamics furnishes the relationship between______________________?

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

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

A. justified
B. not possible
C. may be possible with lot of sophistications
D. cost will be very high
E. theroretically possible

A. Carnot cycle
B. Joule cycle
C. Rankine cycle
D. Otto cycle
E. Brayton cycle

A. free expansion or friction resisted expansion/compression process should not be encountered
B. when heat is being absorbed, temperature of hot source and working sub¬stance should be same
C. when beat is being rejected, temperature of cold source and working sub-stance should be same
D. all of the above
E. none of the above

A. heat can’t be transferred from low temperature source to high temperature source
B. heat can be transferred for low temperature to high temperature source by using refrigeration cycle.
C. heat can be transferred from low temperature to high temperature source if COP of process is more than unity
D. heat can’t be transferred from low temperature to high temperature source without the aid of external energy
E. all of the above