Engineering Thermodynamics Questions And Answers - Set 29 - ObjectiveBooks
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# Practice Test: Question Set - 29

1. 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

2. The efficiency of Diesel cycle approaches to Otto cycle efficiency when
(A) Cut-off is increased
(B) Cut-off is decreased
(C) Cut-off is zero
(D) Cut-off is constant

3. The behavior 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

4. The __________ is obtained when carbonization of coal is carried out at 500° to 700° C.
(A) Soft coal
(B) Hard coal
(C) Pulverized coal
(D) Bituminous coal

5. A molecule consisting of one atom is known as
(A) Mono-atomic
(B) Di-atomic
(C) Tri-atomic
(D) Poly-atomic

6. The unit of energy is S. I. units is
(A) Joule (J)
(B) Joule meter (Jm)
(C) Watt (W)
(D) Joule/meter (J/m)

7. The amount of heat generated per kg of fuel is known as
(A) Calorific value
(B) Heat energy
(C) Lower calorific value
(D) Higher calorific value

8. The entropy __________ in an irreversible cyclic process.
(A) Remains constant
(B) Decreases
(C) Increases
(D) None of these

9. For a perfect gas, according to Boyle's law (where p = Absolute pressure, v = Volume, and T = Absolute temperature)
(A) p v = constant, if T is kept constant
(B) v/T = constant, if p is kept constant
(C) p/T = constant, if v is kept constant
(D) T/p = constant, if v is kept constant

10. Which of the following is the extensive property of a thermodynamic system?
(A) Pressure
(B) Volume
(C) Temperature
(D) Density

11. The increase in entropy of a system represents
(A) Increase in availability of energy
(B) Increase in temperature
(C) Decrease in pressure

12. A cycle consisting of two isothermal and two isentropic processes, is known as
(A) Carnot cycle
(B) Stirling cycle
(C) Ericsson cycle
(D) Joule cycle

13. When coal is strongly heated continuously for 42 to 48 hours in the absence of air in a closed vessel, the process is known as __________ of fuel.
(A) Atomization
(B) Carbonization
(C) Combustion
(D) None of these

14. Which of the following is an intensive property of a thermodynamic system?
(A) Volume
(B) Temperature
(C) Mass
(D) Energy

15. In an extensive property of a thermodynamic system
(A) Extensive heat is transferred
(B) Extensive work is done
(C) Extensive energy is utilized
(D) None of these

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