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Coal and Petroleum Test - 21

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Coal and Petroleum Test - 21
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  • Question 1
    1 / -0
    Select the correct option that applies to gaseous fuels:
    (A) have high ignition temperature
    (B) have low calorific value
    (C) are easy to ignite
    (D) have high calorific value
    Solution
    Gaseous fuels have low ignition temperature and thus burn easily. Moreover, they possess high calorific value in comparison to solid and liquid fuels.
  • Question 2
    1 / -0
    The necessary conditions for the combustion process to occur are:
    (A) availability of air/oxygen
    (B) availability of air/oxygen and fuel
    (C) the temperature of the fuel below the ignition temperature
    (D) the temperature of fuel above the ignition temperature
    Select the correct alternatives.
    Solution
    For combustion, fuel, oxygen/air, and a temperature more than the ignition temperature of the fuel are required.
    Hence, option B is correct.
  • Question 3
    1 / -0
    Thermal power plants make use of:
    Solution
    Thermal power plants make use of coal, petroleum and natural gas.
  • Question 4
    1 / -0
    Petroleum is:
  • Question 5
    1 / -0
    When an oil well is drilled through rocks _______ comes out first.
    Solution
    An oil well is a boring in the Earth that is designed to bring petroleum oil hydrocarbons to the surface. Usually some natural gas is produced along with the oil. A well that is designed to produce mainly or only gas may be termed a gas well.
    Thus Option C is correct.

  • Question 6
    1 / -0
    What is petroleum commonly called?
    Solution
    Petroleum is called black gold because it is an important source of energy, and its byproducts are very valuable and expensive. Moreover, crude petroleum looks black in colour.
  • Question 7
    1 / -0
    The residue left behind after the dry distillation of coal is _____________.
    Solution
    When substances of vegetable origin, e.g. coal, oil shale, peat, or wood are heated in the absence of air (dry distillation), they decompose into gas, liquid products, and solid residue coke/charcoal.
  • Question 8
    1 / -0
    In LPG cylinder, the gas is liquefied by ___________.
    Solution
     LPG is a flammable hydrocarbon gas that is liquefied through pressurization.
  • Question 9
    1 / -0
    Petroleum is refined by:
    Solution
    Crude oil is separated into fractions by fractional distillation. The fractions at the top of the fractionating column have lower boiling points than the fractions at the bottom. All of the fractions are processed further in other refining units.
    Thus Option A is correct.

  • Question 10
    1 / -0
    Which of the following is used as fuel?
    Solution
    Gasoline is used as fuel for cars also known as petrol while other residual products of fractional distillation are used for other purposes than fuel.
    So, the correct answer is 'Gasoline'
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