Engineering Thermodynamics Questions And Answers - Set 22 - ObjectiveBooks

Engineering Thermodynamics Questions And Answers - Set 22

Practice Test: Question Set - 22


1. Mond gas is obtained by
    (A) Partial combustion of coal, coke, anthracite coal or charcoal in a mixed air steam blast
    (B) Carbonization of bituminous coal
    (C) Passing steam over incandescent coke
    (D) Passing air and a large amount of steam over waste coal at about 650°C

2. Which of the following gas has a minimum molecular mass?
    (A) Oxygen
    (B) Nitrogen
    (C) Hydrogen
    (D) Methane

3. The efficiency of Diesel cycle increases with
    (A) Decrease in cut-off
    (B) Increase in cut-off
    (C) Constant cut-off
    (D) None of these

4. An adiabatic process is one in which
    (A) No heat enters or leaves the gas
    (B) The temperature of the gas changes
    (C) The change in internal energy is equal to the mechanical work-done
    (D) All of the above

5. The distillation carried out in such a way that the liquid with the lowest boiling point is first evaporated and re-condensed, then the liquid with the next higher boiling point is then evaporated and re-condensed, and so on until all the available liquid fuels are separately recovered in the sequence of their boiling points. Such a process is called
    (A) Cracking
    (B) Carbonization
    (C) Fractional distillation
    (D) Full distillation

6. A process, in which the temperature of the working substance remains constant during its expansion or compression, is called
    (A) Isothermal process
    (B) Hyperbolic process
    (C) Adiabatic process
    (D) Polytropic process

7. When two bodies are in thermal equilibrium with a third body, they are also in thermal equilibrium with each other. This statement is called
    (A) Zeroth law of thermodynamics
    (B) First law of thermodynamics
    (C) Second law of thermodynamics
    (D) Kelvin Planck's law

8. Which of the following has the highest calorific value?
    (A) Peat
    (B) Lignite
    (C) Bituminous coal
    (D) Anthracite coal

9. Stirling cycle consists of
    (A) Two constant volume and two isentropic processes
    (B) Two constant volume and two isothermal processes
    (C) Two constant pressure and two isothermal processes
    (D) One constant volume, one constant pressure and two isentropic processes

10. Reversed Joule cycle is known as
    (A) Carnot cycle
    (B) Bell-Coleman cycle
    (C) Rankine cycle
    (D) Stirling cycle

11. Which of the following statement is correct?
    (A) The heat and work are boundary phenomena
    (B) The heat and work represent the energy crossing the boundary of the system
    (C) The heat and work are path functions
    (D) All of the above

12. The oxygen atom is ________ times heavier than the hydrogen atom.
    (A) 2
    (B) 8
    (C) 16
    (D) 32

13. The heat flows from a cold body to a hot body with the aid of an external source. This statement is given by
    (A) Kelvin
    (B) Joule
    (C) Clausis
    (D) Gay-Lussac

14. The smallest quantity of a substance, which can exist by itself in a chemically recognizable form is known as
    (A) Element
    (B) Compound
    (C) Atom
    (D) Molecule

15. The behavior of super-heated vapour is similar to that of
    (A) Perfect gas
    (B) Air
    (C) Steam
    (D) Ordinary gas

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