1.1.1 The plasma cutting machine cuts the metal with a/an .. - NSC Agricultural Technology - Question 1 - 2016 - Paper 1
Question 1
1.1.1 The plasma cutting machine cuts the metal with a/an ...
A. water jet.
B. infra-red light beam.
C. electric arc.
D. mixture of burning gases.
1.1.2 The best ga... show full transcript
Worked Solution & Example Answer:1.1.1 The plasma cutting machine cuts the metal with a/an .. - NSC Agricultural Technology - Question 1 - 2016 - Paper 1
Step 1
1.1.1 The plasma cutting machine cuts the metal with a/an ...
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Answer
The correct answer is C: electric arc. Plasma cutting utilizes an electric arc to cut through various types of materials.
Step 2
1.1.2 The best gas mixture for cutting thick steel with a plasma cutting machine is ...
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Answer
The correct answer is A: argon and hydrogen. This mixture is preferred due to its high cutting ability.
Step 3
1.1.3 Oxyacetylene cannot be used to cut ...
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Answer
The correct answer is D: bronze. Oxyacetylene is generally not effective on bronze compared to other materials.
Step 4
1.1.4 ... does not cause undercutting when doing MIG welding.
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Answer
The correct answer is C: A root gap that is too small. A small root gap helps prevent undercutting in MIG welding.
Step 5
1.1.5 If you see black smoke emitting from the exhaust pipe of a compression ignition engine, it indicates a/an ...
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Answer
The correct answer is B: rich air fuel mixture. Black smoke is often a sign of incomplete combustion, which occurs with a rich air-fuel ratio.
