Physics & Chemistry

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1)   Which type of line is particular to section drawings?

  • [A] extension lines
  • [B] cutting plane lines
  • [C] phantom lines
  • [D] break lines

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cutting plane lines

2)   Which of the following gases is lighter than air ?

  • [A] Chlorine
  • [B] Ammonia
  • [C] Oxygen
  • [D] Carbon dioxide

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Ammonia

3)   In which type of rocks are metals like Gold and Copper mostly found ?

  • [A] New metamorphic
  • [B] Old igneous
  • [C] Old metamorphic
  • [D] Old sedimentary

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Old igneous

4)   Potassium nitrate is used in

  • [A] Fertiliser
  • [B] Salt
  • [C] Medicine
  • [D] Glass

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Glass

5)   Parmanent hardness of water may be removed by the addition of

  • [A] Sodium Carbonate
  • [B] Potassium Permanganate
  • [C] Alum
  • [D] Lime

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Sodium Carbonate

6)   Which of the following alloys is used for making magnets ?

  • [A] Magnelium
  • [B] Stainless Steel
  • [C] Duralumin
  • [D] Alnico

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Alnico

7)   The gases used in different types of welding would include

  • [A] Oxygen, acetylene & argon
  • [B] Oxygen & acetylene
  • [C] Oxygen, hydrogen & nitrogen
  • [D] Oxygen & Hydrogen

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Oxygen & acetylene

8)   Heavy water is

  • [A] Deuterium oxide
  • [B] Water at 4 degree celcius
  • [C] Rain water
  • [D] Tritium oxide

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Deuterium oxide

9)   The gas usually filled in electric bulb is

  • [A] Carbon di-oxide
  • [B] Oxygen
  • [C] Hydrogen
  • [D] Nitrogen

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Nitrogen

10)   Which of the following is not a bleaching agent

  • [A] Carbon di-oxide
  • [B] Chlorine
  • [C] Sulpher di-oxide
  • [D] Sodium hypochlorite

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Carbon di-oxide

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