Discussion
Which type of pattern allowance is provided to compensate for the contraction of the metal as it cools from the pouring temperature to the room temperature?
Answer: D
The shrinkage allowance is provided to compensate for the contraction of the metal as it cools from the pouring temperature to the room temperature. The pattern is made larger than the casting by this amount. The draft allowance is a taper given for easy removal of the pattern, the machining allowance is extra material for finishing, and the distortion allowance is for warping in casting, so only the shrinkage allowance fits.
The allowance depends on the metal, about 1 percent for cast iron and about 2 percent for steel, and pattern makers use a shrink rule to build it in.
Post your comment
Please log in or register to post a comment.
Examination Categories
- SSC Exams
- Banking Exams
- Teaching Exams
- Civil Services Exams
- Railways Exams
- Engineering Recruitment Exams
- Defence Exams
- State Government Exams
- Police Exams
- Insurance Exams
- Nursing Exams
- Other Government Exams
- NRA CET
- PG Entrance Exams
- Campus Placement
- MBA Entrance Exams
- CUET and UG Entrance
- Judiciary Exams
- Regulatory Body Exams
- Software Development