Question

For producing a casting of size 300$\times$300$\times$100 mm, a side cylindrical riser is used. Determine the diameter of the riser assuming that the modulus of riser is 20% higher than modulus of casting.

• A. 200 mm
• B. 224 mm
• C. 216 mm
• D. 208 mm

Answer 1

The correct option is C 216 mm

Side cylindrical riser H = D

Casting size = 300$\times$300$\times$100 mm

Modulus of riser if 20% higher than modulus of casting.

$M_r=1.2M_{c}D=?D/6=1.2\times \frac{300\times 300\times 100}{2(300\times 300+300\times 100+300\times 100)}D=36\times 6mmD=216mm$