The door of a running refrigerator inside a room was left open____________________?

WhiCh of the following statements is correct ?
D. None of these

Water contained in a beaker can be made to boil by passing steam through it__________________?

A. At atmospheric pressure
B. At a pressure below the firuosphejric pressure
C. At a pressure greater than atmospheric pressure
D. Any pressure

The energy of molecular motion appears as________________?

A. Heat
B. Potential energy
C. Surface tension
D. Friction

The unit’of universal gas constant is___________________?

A. Watts/°k
B. Dynes/°c
C. Ergscm/°k
D. Erg/°k

I kgf/cm2 is equal to________________?

A. 760 mm hg
B. Zero mm hg
C. 735.6 mm hg
D. 1 mm hg

One barometric pressure or 1 atmospheric pressure is equal to___________________?

A. 1 kgf/cnr2
B. 1.033 kgf/cm2
C. 0 kgf/cm2
D. 1.0197 kgf/cm2

A perpetual motion machine is___________________?

A. A thermodynamic machine
B. A non-thermodynamic machine
C. A hypothetical machine
D. A hypothetical machine whose opera-tion would violate the laws of thermodynamics

According to Clausis statement of second law of thermodynamics___________________?

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

Which of the following is an irreversible cycle_____________________?

A. carnot
B. stirling
C. ericsson
D. all of the above

The efficiency of a Carnot engine depends on_______________________?

A. working substance
B. design of engine
C. size of engine
D. type of fuel fired