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While pouring molten metal in the mould of the molten metal does not appear in the riser. It indicates
- a)a sound casting will be produced
- b)an obstruction between sprue and riser
- c)insufficient molten metal to fill the cavity
- d)either insufficient molten metal to fill the cavity or an obstruction between sprue and riser
Correct answer is option 'A'. Can you explain this answer?
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While pouring molten metal in the mould of the molten metal does not a...
Explanation:
When pouring molten metal into a mould, it is important to ensure that the metal fills the entire cavity without any defects or voids. The use of risers is a common technique to prevent shrinkage defects in castings. A riser is an additional volume of molten metal that is connected to the casting through a channel, and it serves as a reservoir of molten metal that can compensate for the shrinkage during solidification.
If the molten metal does not appear in the riser during pouring, it indicates that a sound casting will be produced. This is because the molten metal has completely filled the cavity without any defects or voids, and there is no need for additional molten metal from the riser. This is a desirable situation, as it indicates that the casting will have good dimensional accuracy and mechanical properties.
If the molten metal does not appear in the riser, it rules out the possibility of the other three options:
- An obstruction between sprue and riser: If there was an obstruction, the molten metal would not have been able to flow freely into the cavity, and there would be defects or voids in the casting.
- Insufficient molten metal to fill the cavity: If there was insufficient molten metal, the cavity would not have been completely filled, and there would be defects or voids in the casting.
- Either insufficient molten metal to fill the cavity or an obstruction between sprue and riser: This is a combination of the previous two options, and it is also ruled out by the absence of molten metal in the riser.
Thus, the absence of molten metal in the riser during pouring is a good sign that a sound casting will be produced.
When pouring molten metal into a mould, it is important to ensure that the metal fills the entire cavity without any defects or voids. The use of risers is a common technique to prevent shrinkage defects in castings. A riser is an additional volume of molten metal that is connected to the casting through a channel, and it serves as a reservoir of molten metal that can compensate for the shrinkage during solidification.
If the molten metal does not appear in the riser during pouring, it indicates that a sound casting will be produced. This is because the molten metal has completely filled the cavity without any defects or voids, and there is no need for additional molten metal from the riser. This is a desirable situation, as it indicates that the casting will have good dimensional accuracy and mechanical properties.
If the molten metal does not appear in the riser, it rules out the possibility of the other three options:
- An obstruction between sprue and riser: If there was an obstruction, the molten metal would not have been able to flow freely into the cavity, and there would be defects or voids in the casting.
- Insufficient molten metal to fill the cavity: If there was insufficient molten metal, the cavity would not have been completely filled, and there would be defects or voids in the casting.
- Either insufficient molten metal to fill the cavity or an obstruction between sprue and riser: This is a combination of the previous two options, and it is also ruled out by the absence of molten metal in the riser.
Thus, the absence of molten metal in the riser during pouring is a good sign that a sound casting will be produced.
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While pouring molten metal in the mould of the molten metal does not a...
If molten metal does not appear in the riser then it means there is either insufficient molten metal or an obstruction between sprue and riser.
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While pouring molten metal in the mould of the molten metal does not appear in the riser. It indicatesa)a sound casting will be producedb)an obstruction between sprue and riserc)insufficient molten metal to fill the cavityd)either insufficient molten metal to fill the cavity or an obstruction between sprue and riserCorrect answer is option 'A'. Can you explain this answer?
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