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In a gating system, the ratio 1:2:4 represents
[ME 2010]
- a)sprue base area : runner area : ingate area
- b)pouring basin area: ingate area: runner area
- c)sprue base area : ingate area : casting area
- d)runner area : ingate area : casting area
Correct answer is option 'A'. Can you explain this answer?
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In a gating system, the ratio 1:2:4 represents[ME 2010]a)sprue base ar...
The ratio 1:2:4 in a gating system represents the relationship between the sprue base area, runner area, and ingate area. Let's break down the options and understand why option 'A' is the correct answer.
a) Sprue base area : Runner area : Ingate area
The sprue base area is the cross-sectional area at the base of the sprue, which is the channel that allows molten metal to flow from the pouring basin to the runner system. The runner area is the cross-sectional area of the runner, which is the channel that distributes the molten metal from the sprue to the ingate. The ingate area is the cross-sectional area of the ingate, which is the entrance point for the molten metal into the mold cavity.
The ratio 1:2:4 indicates that the sprue base area is 1 unit, the runner area is 2 units, and the ingate area is 4 units. This means that the runner area is twice the size of the sprue base area, and the ingate area is four times the size of the sprue base area.
b) Pouring basin area : Ingate area : Runner area
This option is incorrect because it reverses the order of the runner area and ingate area in the ratio. The pouring basin area is the area where the molten metal is poured into the gating system, and it is not directly related to the ratio mentioned in the question.
c) Sprue base area : Ingate area : Casting area
This option is incorrect because it does not include the runner area in the ratio. The casting area represents the cross-sectional area of the actual casting or the mold cavity, and it is not directly related to the gating system.
d) Runner area : Ingate area : Casting area
This option is incorrect because it does not include the sprue base area in the ratio. The sprue base area is an important component of the gating system and has a direct impact on the flow of molten metal.
Therefore, the correct answer is option 'A', which represents the ratio of sprue base area : runner area : ingate area.
a) Sprue base area : Runner area : Ingate area
The sprue base area is the cross-sectional area at the base of the sprue, which is the channel that allows molten metal to flow from the pouring basin to the runner system. The runner area is the cross-sectional area of the runner, which is the channel that distributes the molten metal from the sprue to the ingate. The ingate area is the cross-sectional area of the ingate, which is the entrance point for the molten metal into the mold cavity.
The ratio 1:2:4 indicates that the sprue base area is 1 unit, the runner area is 2 units, and the ingate area is 4 units. This means that the runner area is twice the size of the sprue base area, and the ingate area is four times the size of the sprue base area.
b) Pouring basin area : Ingate area : Runner area
This option is incorrect because it reverses the order of the runner area and ingate area in the ratio. The pouring basin area is the area where the molten metal is poured into the gating system, and it is not directly related to the ratio mentioned in the question.
c) Sprue base area : Ingate area : Casting area
This option is incorrect because it does not include the runner area in the ratio. The casting area represents the cross-sectional area of the actual casting or the mold cavity, and it is not directly related to the gating system.
d) Runner area : Ingate area : Casting area
This option is incorrect because it does not include the sprue base area in the ratio. The sprue base area is an important component of the gating system and has a direct impact on the flow of molten metal.
Therefore, the correct answer is option 'A', which represents the ratio of sprue base area : runner area : ingate area.
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In a gating system, the ratio 1:2:4 represents[ME 2010]a)sprue base area : runner area : ingate areab)pouring basin area: ingate area: runner areac)sprue base area : ingate area : casting aread)runner area : ingate area : casting areaCorrect answer is option 'A'. Can you explain this answer?
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