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 gas m... 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 ...
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The correct answer is C: electric arc. Plasma cutting machines utilize high-temperature plasma created through an electric arc to effectively cut through metal.
Step 2
1.1.2 The best gas mixture for cutting thick steel with a plasma cutting machine is ... because of its high cutting ability.
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The correct answer is A: argon and hydrogen. This combination provides enhanced cutting efficiency due to the reduced oxidation and better heat transfer properties.
Step 3
1.1.3 Oxyacetylene cannot be used to cut ...
96%
101 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The correct answer is C: stainless steel. Oxyacetylene cutting is generally ineffective on stainless steel due to the risk of warping and other issues.
Step 4
1.1.4 ... does not cause undercutting when doing MIG welding.
98%
120 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The correct answer is D: Poor welding technique. Undercutting issues are often the result of inadequate technique rather than welding speed or current.
Step 5
1.1.5 If you see black smoke emitting from the exhaust pipe of a compression ignition engine, it indicates a/an ...
97%
117 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The correct answer is B: rich air fuel mixture. Black smoke typically signals incomplete combustion due to excess fuel.
