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MCQs

Laws Of Thermodynamics

Total Questions : 1462 | Page 143 of 147 pages
Question 1421. If a fluid expands suddenly into vacuum through an orifice of large dimension, then such a process is called___________________?
  1.    free expansion
  2.    hyperbolic expansion
  3.    adiabatic expansion
  4.    parabolic expansion
  5.    throttling
 Discuss Question
Answer: Option A. -> free expansion
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1422. For which of the following substances, the internal energy and enthalpy are the functions of temperature only____________________?
  1.    any gas
  2.    saturated steam
  3.    water
  4.    perfect gas
  5.    superheated steam
 Discuss Question
Answer: Option D. -> perfect gas
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1423. Universal gas constant is defined as equal to product of the molecular weight of the gas and_______________?
  1.    specific heat at constant pressure
  2.    specific heat at constant volume
  3.    ratio of two specific heats
  4.    gas constant
  5.    unity
 Discuss Question
Answer: Option D. -> gas constant
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1424. The value of the product of molecular weight and the gas characteristic constant for all the gases in M.K.S. unit is______________________?
  1.    29.27 kgfm/mol°K
  2.    8314kgfm/mol°K
  3.    848kgfm/mol°K
  4.    427kgfm/mol°K
  5.    735 kgfm/mol°K
 Discuss Question
Answer: Option C. -> 848kgfm/mol°K
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1425. If a certain amount of dry ice is mixed with same amount of water at 80°C, the final temperature of mixture will be__________________?
  1.    80°C
  2.    0°C
  3.    40°C
  4.    20°C
  5.    60°C
 Discuss Question
Answer: Option B. -> 0°C
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1426. In an isothermal process, the internal energy of gas molecules________________?
  1.    increases
  2.    decreases
  3.    remains constant
  4.    may increase/decrease depending on the properties of gas
  5.    shows unpredictable behaviour
 Discuss Question
Answer: Option C. -> remains constant
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1427. One watt is equal to__________________?
  1.    1 Nm/s
  2.    1 N/mt
  3.    1 Nm/hr
  4.    1 kNm/hr
  5.    1 kNm/mt
 Discuss Question
Answer: Option A. -> 1 Nm/s
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1428. For which of the following substances, the gas laws can be used with minimum error_________________?
  1.    dry steam
  2.    wet steam
  3.    saturated steam
  4.    superheated steam
  5.    steam at atmospheric pressure
 Discuss Question
Answer: Option D. -> superheated steam
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1429. Solids and liquids have___________________?
  1.    one value of specific heat (ft) two values of specific heat
  2.    three values of specific heat
  3.    no value of specific heat
  4.    one value under some conditions and two values under other conditions
 Discuss Question
Answer: Option A. -> one value of specific heat (ft) two values of specific heat
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1430. Which of the following parameters is constant for a mole for most of the gases at a given temperature and pressure___________________?
  1.    enthalpy
  2.    volume
  3.    mass
  4.    entropy
  5.    specific volume
 Discuss Question
Answer: Option B. -> volume
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

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