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MCQs

Total Questions : 1058 | Page 81 of 106 pages
Question 801. A series of operations, which takes place in a certain order and restore the initial conditions at the end, is known as
  1.    Reversible cycle
  2.    Irreversible cycle
  3.    Thermodynamic cycle
  4.    None of these
 Discuss Question
Answer: Option C. -> Thermodynamic cycle
Question 802. The smallest quantity of a substance, which can exist by itself in a chemically recognizable form is known as
  1.    Element
  2.    Compound
  3.    Molecule
  4.    Atom
 Discuss Question
Answer: Option C. -> Molecule
Question 803. The specific heat of water is
  1.    1.817
  2.    None of these
  3.    4.187
  4.    2.512
 Discuss Question
Answer: Option C. -> 4.187
Question 804. The amount of heat generated per kg of fuel is known as
  1.    Higher calorific value
  2.    Heat energy
  3.    Calorific value
  4.    Lower calorific value
 Discuss Question
Answer: Option C. -> Calorific value
Question 805. When cut-off ratio is ________; the efficiency of Diesel cycle approaches to Otto cycle efficiency
  1.    Zero
  2.    43835
  3.    2
  4.    43834
 Discuss Question
Answer: Option A. -> Zero
Question 806. Change in enthalpy of a system is the heat supplied at
  1.    Constant temperature
  2.    Constant pressure
  3.    Constant entropy
  4.    Constant volume
 Discuss Question
Answer: Option B. -> Constant pressure
Question 807. During which of the following process does heat rejection takes place in Carnot cycle?
  1.    Isentropic compression
  2.    Isothermal compression
  3.    Isentropic expansion
  4.    Isothermal expansion
 Discuss Question
Answer: Option B. -> Isothermal compression
Question 808. The unit of pressure in S.I. units is
  1.    Dyne per square cm
  2.    mm of water column
  3.    kg/cm²
  4.    Pascal
 Discuss Question
Answer: Option D. -> Pascal
Question 809. The general law of expansion or compression is pvn = C, The process is said to be hyperbolic, if n is equal to
  1.    ∝
  2.    γ
  3.    1
 Discuss Question
Answer: Option C. -> 1
Question 810. The unit of mass in S.I. units is
  1.    Quintal
  2.    Kilogram
  3.    Tonne
  4.    Gram
 Discuss Question
Answer: Option B. -> Kilogram

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