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Calculate the riser diameter for an annular cylinder of 30 cm outer diameter, 10 cm inner diameter and 30cm height. ( correction factor = 1.14)

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in Casting-Forming-Welding I by (687k points)
Calculate the riser diameter for an annular cylinder of 30 cm outer diameter, 10 cm inner diameter and 30cm height. ( correction factor = 1.14)

(a) 22cm

(b) 20cm

(c) 22.6cm

(d) 20.6cm

I have been asked this question in examination.

I'm obligated to ask this question of Pattern Design topic in portion Pattern and Pattern Making of Casting-Forming-Welding I

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The correct choice is (c) 22.6cm

The best I can explain: Core dia = 10cm    Plate thickness = 10cm  Correction factor = 1.14

Riser Volume = 0.48 x 18849 = 907.52 cm^3

∴ Riser diameter = 22.585cm = 22.6cm.

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