If a metal sprue is used,it must be:
A) coated with a surfactant.
B) removed before casting.
C) burned out with the wax.
D) secured in the investment.
Correct Answer:
Verified
Q6: Which of the following sequences describing the
Q20: The investment material is _; the wax
Q21: The blowtorch used to heat casting alloys:
A)
Q22: Investment is retained in a _ while
Q23: Casting alloys are melted using:
A) a blowtorch.
B)
Q25: If base-metal castings are pickled,_ will occur.
A)
Q26: A sprue forms a channel in the
Q27: Expansion of the binder from added water
Q28: Pickling a casting:
A) removes surface oxides.
B) uses
Q29: The purpose of flux is to minimize:
A)
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