Engineering Thermodynamics Questions And Answers - Set 20 - ObjectiveBooks
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# Practice Test: Question Set - 20

1. In a reversible adiabatic process, the ratio of T1/T2 is equal to
(A) (p2/p1)γ - 1/ γ
(B) (p1/p2)γ - 1/ γ
(C) (v2/v1)γ - 1/ γ
(D) (v1/v2)γ - 1/ γ

2. First law of thermodynamics deals with
(A) Conservation of heat
(B) Conservation of momentum
(C) Conservation of mass
(D) Conservation of energy

3. The value of cp/cv for air is
(A) 1
(B) 1.4
(C) 1.45
(D) 2.3

4. The fuel mostly used in cement industry and in metallurgical processes is
(A) Wood charcoal
(B) Bituminous coke
(C) Pulverized coal
(D) Coke

5. The absolute zero pressure can be attained at a temperature of
(A) 0°C
(B) 273°C
(C) 273 K
(D) None of these

6. Which of the following is a reversible non-flow process?
(A) Isochoric process
(B) Isobaric process
(C) Hyperbolic process
(D) All of these

7. Which of the following is the correct statement?
(A) All the reversible engines have the same efficiency.
(B) All the reversible and irreversible engines have the same efficiency.
(C) Irreversible engines have maximum efficiency.
(D) All engines are designed as reversible in order to obtain maximum efficiency.

8. In S. I. units, the value of the universal gas constant is
(A) 8.314 J/kg mole-K
(B) 83.14 J/kgmole-K
(C) 831.4 J/kgmole-K
(D) 8314 J/kgmole-K

9. When gas is heated at constant pressure, the heat supplied is utilized in
(A) Increasing the internal energy of gas
(B) Doing some external work
(C) Increasing the internal energy of gas and also for doing some external work
(D) None of the above

10. Kerosene is distilled at
(A) 65° to 220°C
(B) 220° to 345°C
(C) 345° to 470°C
(D) 470° to 550°C

11. In open cycle gas turbine plants
(A) The indirect heat exchanger and cooler is avoided
(B) Direct combustion system is used
(C) A condenser is used
(D) All of the above

12. The volumetric or molar specific heat at constant pressure is the product of
(A) Molecular mass of the gas and the specific heat at constant volume
(B) Atomic mass of the gas and the gas constant
(C) Molecular mass of the gas and the gas constant
(D) None of the above

13. The measurement of a thermodynamic property known as temperature is based on
(A) Zeroth law of thermodynamics
(B) First law of thermodynamics
(C) Second law of thermodynamics
(D) None of these

14. Which is the incorrect statement about Carnot cycle?
(A) It is used as the alternate standard of comparison of all heat engines.
(B) All the heat engines are based on Carnot cycle.
(C) It provides concept of maximizing work output between the two temperature limits.
(D) All of the above