Q. Which defect is caused due to the conversion of moisture to steam because of the heat of molten metal?

  • (A) blow holes
  • (B) open blows
  • (C) air inclusions
  • (D) cold shut
💬 Discuss
✅ Correct Answer: (A) blow holes
Explanation: blow holes are entrapped gases, which are formed as a result of gases from mould, molten metal and stream sand. further these are caused due to the conversion of moisture to steam because of the heat of molten metal.

Published by Mr. Dubey ⭐ 111.54K Points at 20-Sep-2023 12:46 pm in Manufacturing Technology

Explanation by: Mr. Dubey
blow holes are entrapped gases, which are formed as a result of gases from mould, molten metal and stream sand. further these are caused due to the conversion of moisture to steam because of the heat of molten metal.

💬 Discussion

Related MCQs

Q. The maximum number of generators in a power plant must be

Q. In case of ball bearing

Q. Power is produced when the working fluid does some work on the?

Q. The permissible hardness of water for public supplies is

Q. circuit

Q. Persence of lead in brass improves

Q. Overall thermal resistance for conductive heat transfer through a series of flat resistances is equal to the

Q. In continuous distillation, the internal reflux ratio (Ri) and the external reflux ratio (Re) are related as

Q. If there is a decrease in viscosity, the heat transfer coefficient ____________

Q. When variable used in the program is a whole number,then variable is stored as ___________.

📊 Question Analytics

👁️
557
Total Visits
📽️
3 y ago
Published
🎖️
Mr. Dubey
Publisher
📈
88%
Success Rate