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(a) (i) Name each of the oxy-acetylene flames shown at A, B and C - Leaving Cert Engineering - Question 4 - 2017
Question 4
(a) (i) Name each of the oxy-acetylene flames shown at A, B and C. (ii) State the proportions of oxygen and acetylene required for each of the flames shown at A, B... show full transcript
Worked Solution & Example Answer:(a) (i) Name each of the oxy-acetylene flames shown at A, B and C - Leaving Cert Engineering - Question 4 - 2017
Step 1
Step 2
State the proportions of oxygen and acetylene required for each of the flames shown at A, B and C above.
Answer
A: (Oxidising flame)
An oxidising flame has more oxygen than acetylene.
B: (Carburising flame)
A carburising flame contains a greater ratio of acetylene than oxygen.
C: (Neutral flame)
A neutral flame has equal proportions of acetylene and oxygen.
Step 3
Describe any three of the following in relation to soft soldering: Electric soldering iron.
Answer
An electric soldering iron is used to heat up the materials and melt the solder when producing a soldered joint. The soldering iron contains an electric element which heats up the soldering tip when electricity is allowed to pass through it.
Step 4
Describe any three of the following in relation to soft soldering: A sweated joint.
Answer
A sweated joint is produced when two pieces of material which have a thin layer of solder on their outside are brought together and heated. The solder melts on both pieces allowing the solder to fuse (sweat) together. When the joint is allowed to cool, a permanent joint between both materials is produced.
Step 5
Answer any three of the following: Describe the joining process which uses the welding machine shown.
Answer
Spot welding is performed by placing the electrodes either side of two pieces and when an electric current flows between the electrodes the joint in the middle of the two pieces heats up and melts creating a nugget weld.
Step 6
Step 7