What is the length of the flakes in gray cast iron?
Select an option to see the answer and solution.
Metallurgical Engineering · all questionsFoundry Metallurgy
Foundry Metallurgy
practice.
Practice every MCQ with options. Use Show answers when you want the correct option and solution.
63
Questions
2/4
Page
Pick an option on a question to see the right answer and solution.
Loam sand contains . . . . . . . . of moisture
Select an option to see the answer and solution.
The riser is designed such that the melt in the riser solidifies
Select an option to see the answer and solution.
What is the solidification temperature of malleable cast iron?
Select an option to see the answer and solution.
Match the defect with appropriate cause.
| List-I | List-II |
| P. Hot tear | 1. Inadequate riser |
| Q. Porosity | 2. Loosely rammed sand mould |
| R. Sand inclusions | 3. Mould restraint |
| S. Shrinkage cavity | 4. Gas entrapment |
Select an option to see the answer and solution.
When the cooling rate during solidification process is very slow then the growth of nuclei takes place by
Select an option to see the answer and solution.
Match the features observed in castings listed in Group I with the most appropriate reasons listed in Group II.
| Group I | Group II |
| P. Macrosegregation | 1. Inoculation |
| Q. Fine grained structure | 2. Gas evolution and shrinkage |
| R. Porosity | 3. Temperature gradients and supercooling |
| S. dendrites | 4. Density difference and convection currents |
Select an option to see the answer and solution.
Casting alloys with a large freezing range tend to result in
P. shrinkage cavity
Q. distributed shrinkage porosity
R. liquid metal with poorer fluidity
S. liquid metal with superior fluidity
P. shrinkage cavity
Q. distributed shrinkage porosity
R. liquid metal with poorer fluidity
S. liquid metal with superior fluidity
Select an option to see the answer and solution.
Mould coating material which helps in grain refinement of metal casting is
Select an option to see the answer and solution.
Mould oscillation is used in continuous casting of steels to
Select an option to see the answer and solution.
What are the bonding theories?
Select an option to see the answer and solution.
What are the materials used for pattern making?
Select an option to see the answer and solution.
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.
Assume that both while solid and liquid remain at the melting point, they are in the mould.
Select an option to see the answer and solution.
. . . . . . . . is the tendency of the matter to change its shape, area and volume in response to a change in temperature
Select an option to see the answer and solution.
What are the tests done for molding sand?
Select an option to see the answer and solution.
Riser are not required for casting
Select an option to see the answer and solution.
What are the parameters that amount of taper depends?
Select an option to see the answer and solution.
In a sound casting the last liquid to solidify is in the
Select an option to see the answer and solution.
Match the defects in Group 1 with possible causes in Group 2.
| Group 1 | Group 2 |
| P. Misruns | 1. Sand expansion |
| Q. Shifts | 2. Molding materials |
| R. Blowholes | 3. Improper heating of metals |
| S. Scabs | 4. Molding and core making |
Select an option to see the answer and solution.
During metal casting of a slab, the thickness of solid formed after time 't' is proportional to
Select an option to see the answer and solution.