WebA flame is divided into 3 zones: the outermost, the middle, and the innermost zone. The outermost part of the flame produces the most heat. Goldsmiths blow the outermost zone of a flame with a metallic blow-pipe for melting gold and silver. Goldsmith uses the outermost zone of flame for melting because it is the hottest part of the flame. WebApr 7, 2024 · Goldsmith blow air with a blow-pipe to intensify a kerosene lamp flame for melting and moulding pieces of gold and silver into desired shapes to make jewellery.When air is blown through blow-pipe into the …
How do Goldsmiths melt gold and silver? - Teachoo - Extra …
WebA goldsmith blows air into the kerosene lamp flame with a blow pipe so that complete combustion of fuel takes place and the temperature of the flame increases. He blow the outermost zone of a flame with a metallic blow pipe for melting gold and silver because this is the hottest part of the flame. Question 45. In which zone of a candle flame: WebMar 8, 2024 · Explanation: The outermost zone of a flame is a zone of complete combustion, also known as the luminous zone. Goldsmiths blow the outermost zone of a flame to melt gold or silver. This zone’s ignition temperature is the highest, which aids in melting the metal the best for creating desired designs or patterns. mkcl mumbai university
Why do goldsmiths blow the outer surface of the flame with a …
WebQ 16 – Which part of a flame does a goldsmith blow for melting gold and silver? Ans. The goldsmith blows the outermost zone of a flame for melting gold and silver. Q 17 – What is the unit for expressing the calorific value of a fuel? ... Q 31 – Define the dark zone of a flame. Ans. The innermost zone of a flame around the wick is called ... WebOct 10, 2024 · The goldsmith uses the outermost zone of the flame for melting gold and silver because this zone of flame undergoes the 'complete combustion', which means in this zone maximum heat is generated due to maximum oxidation which helps these metals to melt easily. [Extra information: When any substances are burnt with the help of oxygen, a … mkc local offer