1. A heat engine has to exchange heat with ___ energy reservoir at ___ different temperatures to produce net work in a complete cycle?
a) one, one
b) one, two
c) two, two
d) none of the mentioned
Explanation: This is required to produce power.
2. The second law is not a deduction of the first law..
a) true
b) false
Explanation: The first law is a separate law of nature.
3. The continual operation of a machine that creates its own energy and thus violates the first law is called
a) PMM2
b) PMM1
c) PMM0
d) none of the mentioned
Explanation: This is a basic fact about PMM1.
4. Which of the following is true?
a) heat always from a high temperature body to a low temperature body
b) heat always from a low temperature body to a high temperature body
c) heat can flow from both low to high and high to low temperature body
d) none of the mentioned
Explanation: The reverse process never occurs spontaneously.
5. According to Clausius statement
a) it is impossible to construct a device than can transfer heat from a cooler body to a hotter body without any effect
b) it is impossible to construct a device than can transfer heat from a hotter body to a cooler body without any effect
c) it is possible to construct a device than can transfer heat from a cooler body to a hotter body without any effect
d) none of the mentioned
Explanation: To transfer heat from a cooler body to a hotter body, some work must be expended.
6. If the second law were not true
a) a ship could be driven by extracting heat from the ocean
b) run a power plant by extracting heat from the air
c) both of the mentioned
d) none of the mentioned
Explanation: Both of the above possibilities do not violate the first law but do violate the second law.
7. The operation of a machine that utilizes the internal energy of only one TER, thus violating second law is called
a) PMM0
b) PMM1
c) PMM2
d) none of the mentioned
Explanation: PMM2 violates the second law.
8. A reversible process is performed in such a way that
a) at the conclusion of process, both system and surroundings can be restored to their initial states without producing any change
b) it should not leave any trace to show that the process had ever occurred
c) it is carried out infinitely slowly
d) all of the mentioned
Explanation: These are some basic concepts of a reversible process.
9. Irreversibility of a process may be due to
a) lack of equilibrium during the process
b) involvement of dissipative effects
c) both of the mentioned
d) none of the mentioned
Explanation: These two are the major causes of irreversibility.
10. A reversible process coincides with a quasi-static process.
a) true
b) false
Explanation: A reversible process is carried out very slowly and every state it passes through is an equilibrium state.