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MCQs

Total Questions : 1058 | Page 72 of 106 pages
Question 711.

Properties of substances like pressure, temperature and density, in thermodynamic coordinates are


  1.    path functions
  2.    point functions
  3.    cyclic functions
  4.    real functions
  5.    thermodynamic functions.
 Discuss Question
Answer: Option B. -> point functions



Question 712.


Degree of static indeterminacy of a rigid-jointed plane frame having 15 members, 3 reaction components and 14 joints is


  1.    2
  2.    3
  3.    6
  4.    8
 Discuss Question
Answer: Option C. -> 6



Question 713.

The unit of temperature in S.I. units is


  1.    Centigrade
  2.    Celsius
  3.    Fahrenheit
  4.    Kelvin
  5.    Rankine.
 Discuss Question
Answer: Option D. -> Kelvin


Question 714.

All the commercial liquid fuels are derived from natural petroleum (or crude oil).


  1.    True
  2.    False
 Discuss Question
Answer: Option A. -> True



Question 715.

According to Dalton's law, the total pres sure of the mixture of gases is equal to


  1.    greater of the partial pressures of all
  2.    average of the partial pressures of all
  3.    sum of the partial pressures of all
  4.    sum of the partial pressures of all divided by average molecular weight
  5.    atmospheric pressure.
 Discuss Question
Answer: Option C. -> sum of the partial pressures of all



Question 716. 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)
  1.    None of the listed here
  2.    dQ = ds/T
  3.    δQ = T.ds
  4.    δQ = T/ds
 Discuss Question
Answer: Option C. -> δQ = T.ds
Question 717. For same compression ratio and for same heat added
  1.    Otto cycle is more efficient than Diesel cycle
  2.    Efficiency depends on other factors
  3.    Both Otto and Diesel cycles are equally efficient
  4.    Diesel cycle is more efficient than Otto cycle
 Discuss Question
Answer: Option A. -> Otto cycle is more efficient than Diesel cycle
Question 718. Those substances which have so far not been resolved by any means into other substances of simpler form are called
  1.    Elements
  2.    Compounds
  3.    Molecules
  4.    Atoms
 Discuss Question
Answer: Option A. -> Elements
Question 719. The heat supplied to the gas at constant volume is (where m = Mass of gas, cv = Specific heat at constant volume, cp = Specific heat at constant pressure, T2 - T1 = Rise in temperature, and R = Gas constant)
  1.    mcp (T2 + T1)
  2.    mcp (T2 - T1)
  3.    mR (T2 - T1)
  4.    mcv (T2 - T1)
 Discuss Question
Answer: Option D. -> mcv (T2 - T1)
Question 720. If a fluid expands suddenly into vacuum through an orifice of large dimension, then such a process is called
  1.    Adiabatic expansion
  2.    Free expansion
  3.    Hyperbolic expansion
  4.    Parabolic expansion
 Discuss Question
Answer: Option B. -> Free expansion

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