Thermodynamics - GATE practice papers - Mechanical for Q. 374
Q. What is the Perpetual Motion Machine of First Kind (PMM1)? (Marks: 02)- Published on 19 Oct 15a. a machine which produces mechanical work with consumption of some energy
b. a machine which produces mechanical work without consumption of some energy
c. a machine which generates heat energy with consumption of some external work
d. none of the above
ANSWER: a machine which produces mechanical work without consumption of some energy
PMM1 is a machine which violates first law of thermodynamics. It states that energy neither be created nor be destroyed. Thus PMM1 is a machine which produces mechanical work without consumption of some energy
