Related Questions

At the mould exit of a continuous caster, the metal consisting of a solidified shell with a liquid metal core exits at the rate of 35 kg S-1. Given that the latent heat of fusion is 3 × 105 J kg-1 and the total rate of heat removal by the mould is 4.2 × 106 W, the mass fraction of solid at the mould exit is . . . . . . . .
Assume that both while solid and liquid remain at the melting point, they are in the mould.
The weight of particulates collected by equipment is 246 g, and the total amount of particulates entering it is 650 g. What is the gravimetric efficiency of the equipment?
35 kg of type A sandal powder, which costs Rs. 614 per kg, was mixed with a certain amount of type B sandal powder, which costs Rs. 695 per kg. Then the mixture was sold at the rate of Rs. 767 per kg and 18% profit was earned. What was the amount (in kg) of type B sandal powder in the mixture ?
Continuous passing of Co2 through the mould can decrease the strength of mould and results in a weak mould.
In permanent mould casting, the mould is pre-heated to its operating temperature before the actual use of mould.
Which of the following frictions occurs in an unlubricated journal bearing?
The chemical which used in dry cleaning is/are
1. carbon tetrachloride, commercial dry cleaner powder
2. petrol, benzine
3. telcum powder, sulphur powder
4. French chalk, fuller Earth
Select the correct answer
Which of the following are working principles used to remove particulates from emission streams?
In permanent mould casting, only the metallic type of cores can be used, as the mould material used is also metallic.
To reduce the friction between the mould’s surface and casting, a refractory coating is done to the surface of mould.