Nitrogen gas is used

Chemical Technology Mcqs
BILAL KHATTAK0

A.as protective atmosphere to prevent oxidation in metal working and food preservation
B.for welding
C.for cutting of metals
D.as refrigerant

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  1. High purity oxygen is used for
  2. Thermistor is made of __________________?
  3. The bonding of a rubber sheet with a metal is done by
  4. Aluminium castings are not repaired by
  5. Porosity of a welded joint may be caused by
  6. The loss of strength in compression due to overloading is known as _________________?
  7. In manufacturing ERW tube the type of welding generally used is
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  9. The function of riser is
  10. Weld spatter is

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