Production Engi...

An objected is to be casted using slush casting technique. If for a thickness of object to be 8 mm, it takes 16 seconds, and there is no thickness at t = 0 seconds, then the thickness of casting produced in 25 seconds will be (in mm) ______

Calculate the freezing ratio of a mould for a cubical casting of 8 mm edge and a spherical riser of 6 mm radius ______

Assume a casting section having mass 50 kg. Gating ratio for casting is 1 : 2 : 2. Pouring time and flow efficiency factor are 15 s and 0.92 respectively. Height of sprue is 250 mm. Density of casting is 8000 kg/m³. Choke area (cm²) of casting will be:

A round casting has 0.3 m diameter and 0.5 m length. Another casting of the same metal is rectangular in cross-section with a width to thickness ratio of 3 and length and cross-sectional area is the same as the round casting. Both are casted under identical conditions. The ratio of the solidification times of the rectangular and round casting \(\frac{{{t}_{rect}}}{{{t}_{round}}}\) is ________

A casting is filled by top and bottom gating system. The size of casting is 50 cm × 50 cm × 25 cm and the runner has a height of 30 cm. If the sprue base diameter is 4 cm, then the filling time for

An alloy of 92% aluminum and 8% copper is used in a casting process using a sand core that weighs 20 kg. The buoyancy force (in N) which tends to lift the casting during pouring is _______

Which of the following statements are incorrect?

A casting of size 200 mm × 100 mm × 70 mm solidification 20 min. The solidification time for a casting 200 mm × 100 mm × 35 mm under similar condition is _________ min.