State each of the flames shown at A, B and C - Leaving Cert Engineering - Question 4 - 2019
Question 4
State each of the flames shown at A, B and C.
(A)
(B)
(C)
State the proportions of oxygen and acetylene required for each of the flames shown at A, B and C.
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Worked Solution & Example Answer:State each of the flames shown at A, B and C - Leaving Cert Engineering - Question 4 - 2019
Step 1
Name each of the flames shown at A, B and C.
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Answer
Flame A - Oxidising flame
Flame B - Carburing flame
Flame C - Neutral flame
Step 2
State the proportions of oxygen and acetylene required for each of the flames shown at A, B and C.
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Answer
For Flame A (Oxidising flame) - More oxygen than acetylene.
For Flame B (Carburing flame) - More acetylene than oxygen.
For Flame C (Neutral flame) - Equal amounts of oxygen and acetylene.
Step 3
Give one suitable use for Earth clamp.
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The earth clamp is used to provide a connection to the workpiece being welded, ensuring the electrical circuit is complete for welding.
Step 4
Give one suitable use for Flashback arrestor.
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The flashback arrestor is used to prevent the backflow of flame through the gas hose, avoiding explosions and protecting the welding equipment.
Step 5
Give one suitable use for Flux.
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Flux is used to protect the welded area from oxidation during the welding process.
Step 6
Name a suitable method used to join sheet steel.
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Spot welding or soldering using pop rivets.
Step 7
Why is it important to test a circuit before soldering it together?
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Testing ensures that the circuit is functioning correctly before soldering, preventing damage to components and ensuring safety.
Step 8
Explain the difference between an M5 hole and a d5 hole.
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An M5 hole is threaded to fit a 5mm thread, while a d5 hole is drilled to a diameter of 5mm without threading.
Step 9
Explain why it is important to work in a well-ventilated area when using adhesives.
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Working in a ventilated area reduces exposure to harmful fumes, providing a safe environment and helping to minimize health risks.
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