Engineering thermodynamics mcq part 5

Engineering thermodynamics mcq part 5

01. Which of the following gas has the highest calorific value?

Coal gas.

02. Equal volumes of all gases, at the same temperature and pressure, contains equal number of molecules.

This declaration is called Avogadro's law.

03. The soft coke is obtained when carbonization of coal is carried out at.

500°C to 700°C.

04. A process, in which the gas is heated or expanded in such a way that the product of its pressure and volume remains constant, is called.

hyperbolic process.

Explanations: -

Hyperbolic Process- in this process where the gas is heated or else expanded in such a way that the product of its pressure and volume remains constant.

05. The behavior of super-heated vapor is similar to that of.

perfect gas.

06. Which of the following is a reversible non-flow process?

Isochoric process.

Isobaric process.

Hyperbolic process.

all of these.

07. The amount of heat generated per kg of fuel is known as.

calorific value.

08. The hyperbolic process is governed by.

Boyle's law.

09. A closed system is one in which heat and work crosses the boundary of the system but the mass of the working substance does not crosses the boundary of the system.

So remember into closed system the mass of the working substance does not crosses the boundary.

10. The entropy of water at 0°C is assumed to be.

0(zero).

11. During which of the following process does heat rejection takes place in Carnot cycle?

Isothermal compression.

   

12. When two bodies are in thermal equilibrium with a third body, they are also in thermal equilibrium with each other. This statement is called.

Zeroth law of thermodynamics.

13. The area under the temperature entropy curve (T s curve) of any thermodynamic process represents

A.heat absorbed

B.heat rejected

C.either (a) or (b)

14. The free expansion process is a constant enthalpy process.

So remember into free expansion is a constant enthalpy process.

15. Ericsson cycle consists of.

two constant pressure and two isothermal processes.

16. The isothermal and isentropic processes are.

reversible non-flow processes.

17. The blast furnace gas is a.

by product in the production of pig iron in the blast furnace.

18. The dual combustion cycle consists of.

one constant pressure, two constant volume and two isentropic processes.

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