# thermodynamics

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1. The constant pressure, constant volume and constant pvn processes are regarded as irreversible process.
True
2. Stirling and Ericsson cycles are

A.reversible cycles
B.irreversible cycles
C.semi-reversible cycles
D.quasi-static cycles
reversible cycles
3. When cut-off ratio is __________ the efficiency of Diesel cycle approaches to Otto cycle efficiency.
zero
4. A series of operations, which takes place in a certain order and restore the initial conditions at the end, is known as

A.reversible cycle

B.irreversible cycle

C.thermodynamic cycle

D.none of these
thermodynamic cycle
5. An isothermal process is governed by

A.Boyle's law

B.Charles' law

C.Gay-Lussac law

Boyle's law
6. The sum of internal energy (U) and the product of pressure and volume (p.v) is known as

A.workdone

B.entropy

C.enthalpy

D.none of these
enthalpy
7. The value of 1 mm of Hg is equal to

A.
1.333 N/m2

B.13.33 N/m2

C.133.3 N/m2

D.1333 N/m2
133.3 N/m2
8. One kg of carbon requires 4/3 kg of oxygen and produces __________ kg of carbon monoxide gas.

A.8/3

B.11/3

C.11/7

D.7/3
7/3
9. The behaviour of a perfect gas, undergoing any change in the variables which control physical properties, is governed by

A.Boyle's law
B.Charles' law
C.Gay-Lussac law
D.all of these
all of these
10. The universal gas constant of a gas is the product of molecular mass of the gas and the gas constant.

A.Correct

B.Incorrect
Correct

### Card Set Information

 Author: wajed ID: 266603 Filename: thermodynamics Updated: 2014-03-16 08:32:28 Tags: thermal Folders: science Description: MCQ Show Answers:

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