Mechanical Engineering Exam > Mechanical Engineering Questions > For the pipe fitting like elbow, tee, union e...
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For the pipe fitting like elbow, tee, union etc. which of the following is preferred?
- a)Pig iron
- b)Malleable iron
- c)Spheroidal graphite cast iron
- d)High carbon steel
Correct answer is option 'B'. Can you explain this answer?
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Verified Answer
For the pipe fitting like elbow, tee, union etc. which of the followin...
Malleable iron is cast as white iron, the structure being a metastable carbide in a pearlitic matrix. Through an annealing heat treatment, the brittle structure as first cast is transformed into the malleable form. Carbon agglomerates into small roughly spherical aggregates of graphite leaving a matrix of ferrite or pearlite according to the exact heat treatment used. Three basic types of malleable iron are recognized within the casting industry: blackheart malleable iron, whiteheart malleable iron and pearlitic malleable iron.
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For the pipe fitting like elbow, tee, union etc. which of the followin...
Malleable Iron is preferred for pipe fittings like elbow, tee, union etc.
Explanation:
Pipe fittings like elbow, tee, union etc. are used to connect pipes of different sizes or change the direction of pipes. The material used for pipe fittings should have the following properties:
1. High strength: Pipe fittings should have high strength to withstand the pressure and stress caused by the flow of fluid.
2. Corrosion resistance: Pipe fittings should have excellent corrosion resistance to prevent rusting and decay.
3. Machinability: Pipe fittings should be easy to machine for proper installation.
4. Ductility: Pipe fittings should have good ductility to avoid cracking and breaking during installation.
Malleable iron is a type of cast iron that has been heat-treated to improve its properties. It is preferred for pipe fittings because of the following reasons:
1. High strength: Malleable iron has high strength which makes it suitable for pipe fittings.
2. Corrosion resistance: Malleable iron has excellent corrosion resistance which prevents rusting and decay.
3. Machinability: Malleable iron is easy to machine which makes it suitable for pipe fittings.
4. Ductility: Malleable iron has good ductility which avoids cracking and breaking during installation.
Therefore, malleable iron is preferred for pipe fittings like elbow, tee, union etc.
Explanation:
Pipe fittings like elbow, tee, union etc. are used to connect pipes of different sizes or change the direction of pipes. The material used for pipe fittings should have the following properties:
1. High strength: Pipe fittings should have high strength to withstand the pressure and stress caused by the flow of fluid.
2. Corrosion resistance: Pipe fittings should have excellent corrosion resistance to prevent rusting and decay.
3. Machinability: Pipe fittings should be easy to machine for proper installation.
4. Ductility: Pipe fittings should have good ductility to avoid cracking and breaking during installation.
Malleable iron is a type of cast iron that has been heat-treated to improve its properties. It is preferred for pipe fittings because of the following reasons:
1. High strength: Malleable iron has high strength which makes it suitable for pipe fittings.
2. Corrosion resistance: Malleable iron has excellent corrosion resistance which prevents rusting and decay.
3. Machinability: Malleable iron is easy to machine which makes it suitable for pipe fittings.
4. Ductility: Malleable iron has good ductility which avoids cracking and breaking during installation.
Therefore, malleable iron is preferred for pipe fittings like elbow, tee, union etc.
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For the pipe fitting like elbow, tee, union etc. which of the following is preferred?a)Pig ironb)Malleable ironc)Spheroidal graphite cast irond)High carbon steelCorrect answer is option 'B'. Can you explain this answer?
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