- Very high pouring temperature of the metal
- Insufficient fluidity of the molten metal
- Absorption of gases by the liquid metal
- Improper alignment of the mould flasks
1 Answers
Call
Chart which represents how regularly defect occurs in production process is classified as?
Answer: Option 4 Chart which represents how regularly defect occurs in production process is classified as Pareto chart. A Pareto chart is a type of chart that contains both bars...
1 Answers 1 views
Solidification time of a molten metal in a casting is proportional to (where, V = volume of metal & A = its surface area ; in the casting)?
Answer: Option 4 Let'
1 Answers 1 views
The defect which takes place due to imperfect packing of atoms during crystallization is known as?
Answer: Option 3 Point defects are where an atom is missing or is in an irregular place in the lattice structure. Point defects include self interstitial atoms, interstitial impurity atoms, substitutional...
1 Answers 1 views
Two streams of liquid metal which are not hot enough to fuse properly result into a casting defect known as?
Answer: Option 1 Let'
1 Answers 2 views
A casting defect which occurs due to improper venting of sand is known as?
Answer: Option 2 A casting defect which occurs due to improper venting of sand is known as Blow holes
1 Answers 2 views
A casting defect which results in general enlargement of a casting is known as?
Answer: Option 3 A swell occurs when the mold wall gives way across a whole face, and is caused by an improperly rammed mold. Burn-on occurs when metallic oxides interact...
1 Answers 1 views
A casting defect which occurs near the ingates as rough lumps on the surface of a casting is known as?
Answer: Option 2 A casting defect which occurs near the ingates as rough lumps on the surface of a casting is known as Sand wash
1 Answers 1 views
Sand wash is a casting defect which?
Answer: Option 3 Sand wash is a casting defect which Occurs near the ingates as rough lumps on the surface of a casting
1 Answers 1 views
Shift is a casting defect which?
Answer: Option 1 shift refers to a defect caused by a sidewise displacement of the mold cope relative to the drag, the result of which is a step in the...
1 Answers 1 views
Which defect occurs if a paint is applied excessively thick?
Answer: Option 3 If a paint is applied excessively thick then wrinkling occurs. Grinning occurs when under coat and final coat are of different colours. Running occurs if the surface...
1 Answers 1 views