At what pressure, does the compressed air enter in squeezing machine?(a) 6 kg(f)/cm^2(b) 7 kg(f) /cm^2(c) 8 kg(f) /cm^2(d) 9 kg(f) /cm^2The question was posed to me in an international level competition.I'd like to ask this question from Molding Machines in portion Foundry Mechanizations of Casting-Forming-Welding I

At what pressure, does the compressed air enter in squeezing machine?(

1.	At what pressure, does the compressed air enter in squeezing machine?(a) 6 kg(f)/cm^2(b) 7 kg(f) /cm^2(c) 8 kg(f) /cm^2(d) 9 kg(f) /cm^2The question was posed to me in an international level competition.I'd like to ask this question from Molding Machines in portion Foundry Mechanizations of Casting-Forming-Welding I
Answer» Right answer is (b) 7 kg(F) /cm^2 The explanation: In squeezing MACHINES, the SAND used is rammed very HARD. It has a greater density at the surface than at the INTERIORS. The air required for compression of the sand, enters at 7 kg(f) /cm^2.

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