Recent questions tagged casting

Description : Determine different defects in casting. State their causes and remedies

Last Answer : 1. Blow holes: It is smooth sound cavities produced in a casting due to entrapped bubbles of gases, steam. Causes:- i) Excessive moisture in the sand. ii) low permeability of sand iii) Sand ... Core blow 14. Scabs 15. Pour short 16. Metal penetration 17. Rough surface finish

Description : State two advantages and disadvantages of centrifugal casting. Write four applications.

Last Answer : Centrifugal Casting: Advantages: 1. Relatively very light impurities move inwards towards center. So they can be removed easily thus helping in producing sound castings. 2. Gates and risers are not needed. ... making rollers. 4. Piston rings. 5. Cylinder liners. 6. Pipes of water gas sewage.

Description : List any four casting defects.

Last Answer : The various types of casting defects are as follows: 1. Gas Porosity: Blowholes, open holes, pinholes. 2. Shrinkage defects: shrinkage cavity. 3. Mold material defects: Cut and washes, ... Pouring metal defects: Cold shut, misrun, slag inclusion. Metallurgical defects: Hot tears, hot spot.