3.1 Give ONE reason why the lengths of metals are normally marked or colour-coded at the ends - NSC Mechanical Technology Welding and Metalwork - Question 3 - 2023 - Paper 1
Question 3
3.1 Give ONE reason why the lengths of metals are normally marked or colour-coded at the ends.
3.2 State ONE property of metals that can be determined by EACH of th... show full transcript
Worked Solution & Example Answer:3.1 Give ONE reason why the lengths of metals are normally marked or colour-coded at the ends - NSC Mechanical Technology Welding and Metalwork - Question 3 - 2023 - Paper 1
Step 1
Give ONE reason why the lengths of metals are normally marked or colour-coded at the ends.
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
Lengths of metals are normally marked or colour-coded at the ends to identify the type of metal.
Step 2
State ONE property of metals that can be determined by the Sound test.
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
One property that can be determined by the sound test is hardness.
Step 3
State ONE property of metals that can be determined by the Bending test.
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
One property that can be determined by the bending test is ductility.
Step 4
State ONE property of metals that can be determined by the Machining test.
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
One property that can be determined by the machining test is strength.
Step 5
Why is metal soaked in heat when performing heat-treatment processes?
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
Metal is soaked in heat during heat-treatment processes to ensure uniform heat distribution throughout the metal and to achieve a uniform grain structure after cooling.
Step 6
State TWO methods of conducting case hardening.
97%
121 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Two methods of conducting case hardening are carburizing and nitriding.
Step 7
Explain how steel is annealed during heat-treatment processes.
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
Steel is annealed by heating it slightly above the upper critical temperature for a specified time period and then cooling it slowly back to room temperature.
Step 8
Name TWO quenching mediums that rapidly cool metal after heat-treatment processes.
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
Two quenching mediums that rapidly cool metal are water and oil.
Step 9
Which heat-treatment process follows the hardening process of a metal?
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 heat-treatment process that follows the hardening process of a metal is tempering.
