1.  feed molten metal to casting as it solidifies

2.   prevent atmospheric air form contaminating the metal in the mold

3.  allow the gases to easily escape from mold cavity

4.  allow molten metal to rise above the mod cavity

4
Correct Answer :

feed molten metal to casting as it solidifies


Explanation :
No Explanation available for this question

1.  promote directional solidification

2.  help alloying the metal

3.  facilitate easy removal of core from casting

4.  prevent core movement due to buoyancy

4
Correct Answer :

prevent core movement due to buoyancy


Explanation :
No Explanation available for this question

1.  10

2.  20

3.  24

4.  40

4
Correct Answer :

20


Explanation :
No Explanation available for this question

1.  10

2.  20

3.  24

4.  40

4
Correct Answer :

20


Explanation :
No Explanation available for this question

1.  16 min

2.  2 √8 min

3.  8 min

4.  4 min

4
Correct Answer :

8 min


Explanation :
No Explanation available for this question

1.  16 min

2.  2 √8 min

3.  8 min

4.  4 min

4
Correct Answer :

8 min


Explanation :
No Explanation available for this question

1.  the temp of liquid metal drops from pouring to freezing temp

2.  the metal changes from liquid to solid state at freezing temp

3.  the temp of solid phase drops from freezing to room temp

4.   the temp of metal drops from pouring to room temp

4
Correct Answer :

the temp of solid phase drops from freezing to room temp


Explanation :
No Explanation available for this question

1.  pouring temp of the liquid metal

2.  freezing temp of the liquid metal

3.  the component size

4.  Coefficient of thermal contraction of solidified metal

4
Correct Answer :

pouring temp of the liquid metal


Explanation :
No Explanation available for this question

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