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MCQs

Total Questions : 1058 | Page 91 of 106 pages
Question 901. For the constant pressure and heat input, the air standard efficiency of gas power cycle is in the order
  1.    Dual cycle, Otto cycle, Diesel cycle
  2.    Diesel cycle, Otto cycle, Dual cycle
  3.    Dual cycle, Diesel cycle, Otto cycle
  4.    Otto cycle, Diesel cycle, Dual cycle
 Discuss Question
Answer: Option C. -> Dual cycle, Diesel cycle, Otto cycle
Question 902. The change of entropy, when heat is absorbed by the gas, is
  1.    Positive
  2.    Positive or negative
  3.    None of these
  4.    Negative
 Discuss Question
Answer: Option A. -> Positive
Question 903. When gas is heated at constant pressure, the heat supplied is utilized in
  1.    Increasing the internal energy of gas
  2.    None of these
  3.    Increasing the internal energy of gas and also for doing some external work
  4.    Doing some external work
 Discuss Question
Answer: Option C. -> Increasing the internal energy of gas and also for doing some external work
Question 904. Select the wrong statement
  1.    All of these
  2.    An Otto cycle consists of two constant volume and two isentropic processes.
  3.    An Ericsson cycle consists of two constant pressure and two isothermal processes.
  4.    A Joule cycle consists of two constant volume and two isentropic processes.
 Discuss Question
Answer: Option D. -> A Joule cycle consists of two constant volume and two isentropic processes.
Question 905. The __________ states that change of internal energy of a perfect gas is directly proportional to the change of temperature.
  1.    Charle's law
  2.    Boyle's law
  3.    Gay-Lussac law
  4.    Joule's law
 Discuss Question
Answer: Option D. -> Joule's law
Question 906. The heat flows from a cold body to a hot body with the aid of an external source. This statement is given by
  1.    Clausis
  2.    Kelvin
  3.    Joule
  4.    Gay-Lussac
 Discuss Question
Answer: Option A. -> Clausis
Question 907. The expansion ratio (r) is the ratio of (where v1 = Volume at the beginning of expansion, and v2 = Volume at the end of expansion)
  1.    (v1 + v2)/v1
  2.    v1/v2
  3.    v2/v1
  4.    (v1 + v2)/v2
 Discuss Question
Answer: Option C. -> v2/v1
Question 908. Energy can neither be created nor destroyed, but it can be transformed from one form to another. This statement is known as
  1.    Zeroth law of thermodynamics
  2.    Kinetic theory of gases
  3.    First law of thermodynamics
  4.    Second law of thermodynamics
 Discuss Question
Answer: Option C. -> First law of thermodynamics
Question 909. Superheated vapour behaves
  1.    Exactly as gas
  2.    As steam
  3.    As ordinary vapour
  4.    Approximately as a gas
 Discuss Question
Answer: Option D. -> Approximately as a gas
Question 910. Carnot cycle efficiency depends upon
  1.    Properties of the medium/substance used
  2.    Working condition
  3.    Temperature range of operation
  4.    Condition of engine
 Discuss Question
Answer: Option C. -> Temperature range of operation

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