Copper Is annealed by heating to a cherry red color and ____.

MD 9 Eng.Mat. 3 Pt.4

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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
dousing in cold water
dousing in oil
cooling slowly in air
dousing in hot water
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the approximate melting point of Babbit?
100 def. F.
750 def. F.
650 def. F.
500 def. F.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
At what temperature where soft solder approximately metls?
250 deg. C
450 deg. C
350 deg. C
550 deg. C
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How do you call the process used to retard corrosion (rust) on iron pipe and fitting?
tinning
galvanizing
soldering
sulphurizing
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Copper is annealed by heating to a cherry red color and ___.
dousing in cold water
dousing in oil
cooling slowly in air
dousing in hot water
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the main purpose of ''annealing`` a metal?
to make the metal harder
to make the metal softer
to make the metal harder medium-hard
to make the metal harder shiny
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The purpose of ''tempering`` is to make a metal what?
harder
less brittle
softer
more brittle
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