Lakshya Education MCQs

Question: The heat absorbed or rejected by the working substance is given by (where ds = Increase or decrease of entropy, T = Absolute temperature, and dQ = Heat absorbed or rejected)
Options:
A.δQ = T.ds
B.δQ = T/ds
C.dQ = ds/T
D.None of these
Answer: Option A

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More Questions on This Topic :

Question 1. One kg of carbon monoxide requires __________ kg of oxygen to produce 11/7 kg of carbon dioxide gas.
  1.    4/7
  2.    11/4
  3.    9/7
  4.    All of these
Answer: Option A
Question 2. The efficiency of a gas turbine is given by
  1.    (Net work output)/(Work-done by the turbine)
  2.    (Net work output)/(Heat supplied)
  3.    (Actual temperature drop)/(Isentropic temperature drop)
  4.    (Isentropic increase in temperature)/(Actual increase in temperature)
Answer: Option B
Question 3. One kg of carbon monoxide requires _________kg of oxygen to produce 11/7 kg of carbon dioxide gas.
  1.    11/7
  2.    9/7
  3.    4/7
  4.    All of the above
Answer: Option C
Question 4. The natural solid fuel is
  1.    Wood
  2.    Coke
  3.    Pulverised coal
  4.    Anthracite coal
Answer: Option A
Question 5. For same compression ratio and for same heat added
  1.    Otto cycle is more efficient than Diesel cycle
  2.    Diesel cycle is more efficient than Otto cycle
  3.    Efficiency depends on other factors
  4.    Both Otto and Diesel cycles are equally efficient
Answer: Option A
Question 6. Those substances which have so far not been resolved by any means into other substances of simpler form are called
  1.    Atoms
  2.    Compounds
  3.    Elements
  4.    Molecules
Answer: Option C

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