The purpose of a sprue is to:
A) form the occlusal surface of a casting.
B) form a channel in investment through which the molten alloy travels to form the casting.
C) form the proximal surface of a casting.
D) reduce the metal content of a casting.
Correct Answer:
Verified
Q4: Following removal of a ring from the
Q7: If molten alloy were cast into a
Q8: The total expansion of the investment is
Q8: To prevent premature freezing in the sprue
Q9: The amount of thermal expansion of the
Q10: Which of the following statements is true
Q12: Before investing,a surfactant may be used to:
A)
Q13: A casting alloy is heated in a
Q14: The accuracy of a cast crown may
Q17: Which of the following statements is(are) true
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