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MCQs

Laws Of Thermodynamics

Total Questions : 1462 | Page 142 of 147 pages
Question 1411. In an isothermal process, the internal energy________________?
  1.    increases
  2.    decreases
  3.    remains constant
  4.    first increases and then decreases
  5.    first decreases and then increases
 Discuss Question
Answer: Option C. -> remains constant
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1412. First law of thermodynamics___________________?
  1.    enables to determine change in internal energy of the system
  2.    does not help to predict whether the system will or not undergo a change
  3.    does not enable to determine change in entropy
  4.    provides relationship between heat, work and internal energy
  5.    all of the above
 Discuss Question
Answer: Option E. -> all of the above
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1413. First law of thermodynamics furnishes the relationship between______________________?
  1.    heat and work
  2.    heat, work and properties of the system
  3.    various properties of the system
  4.    various thermodynamic processes
  5.    heat and internal energy
 Discuss Question
Answer: Option B. -> heat, work and properties of the system
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1414. According to first law of thermodynamics__________________?
  1.    work done by a system is equal to heat transferred by the system
  2.    total internal energy of a system during a process remains constant
  3.    internal energy, enthalpy and entropy during a process remain constant
  4.    total energy of a system remains constant
  5.    entropy of a system remains constant
 Discuss Question
Answer: Option D. -> total energy of a system remains constant
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1415. For reversible adiabatic process, change in entropy is_________________?
  1.    maximum
  2.    minimum
  3.    zero
  4.    unpredictable
  5.    negative
 Discuss Question
Answer: Option C. -> zero
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1416. Molecular volume of any perfect gas at 600 x 103 N/m2 and 27°C will be ____________________?
  1.    4.17m3/kgmol
  2.    400 m3/kg mol
  3.    0.15 m3/kg mol
  4.    41.7 m3/kg mol
  5.    417m3/kgmol
 Discuss Question
Answer: Option A. -> 4.17m3/kgmol
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1417. The more effective way of increasing efficiency of Carnot engine is to____________________?
  1.    increase higher temperature
  2.    decrease higher temperature
  3.    increase lower temperature
  4.    decrease lower temperature
  5.    keep lower temperature constant
 Discuss Question
Answer: Option D. -> decrease lower temperature
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1418. Which of the following processes is irreversible process___________________?
  1.    isothermal
  2.    adiabatic
  3.    throttling
  4.    all of the above
  5.    none of the above
 Discuss Question
Answer: Option C. -> throttling
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1419. For a thermodynamic process to be reversible, the temperature difference between hot body and working substance should be___________________?
  1.    zero
  2.    minimum
  3.    maximum
  4.    infinity
  5.    there is no such criterion
 Discuss Question
Answer: Option A. -> zero
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1420. If a gas vapour is allowed to expand through a very minute aperture, then such a process is known as__________________?
  1.    free expansion
  2.    hyperbolic expansion
  3.    adiabatic expansion
  4.    parabolic expansion
  5.    throttling
 Discuss Question
Answer: Option E. -> throttling
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

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