Lesson 7 Self-Check Questions Self-Check Questions Download
1. Dump box and heated metal pattern are used in
a. investment casting b. shell-mould casting c. centrifugal casting d. die casting.
2. The typical thickness of the shell in shell moulding process is approximately
a. 5 mm b. 10 mm c. 15 mm d. 20 mm.
3. For manufacturing precision investment castings the sand generally used is
a. Zircon sand b. Silica sand c. Chromite sand d. Olivine sand
4. For making vanes or blades of a turbine, the recommended method of casting is
a. Shell moulding b. Permanent moluld casting c. Precision investment casting d. Die casting
5. Permanent mould casting is also known as
a. corthias casting b. gravity die casting c. pressure die casting d. slush casting.
6. An expendable mould casting process that employs single-use pattern is
a. Investment casting b. Plaster mould casting c. Ceramic mould casting d. Die casting
7. Compared to many casting processes, the dimensional accuracy and surface finish of the parts produced by sand casting process is
a. poor b. good c. very good d. excellent
8. In investment casting, the pattern is made of
a. wax b. plastics c. plaster of paris d. ceramics
9. Precision casting is another name used for
a. shell-mould casting b. centrifugal casting c. investment casting d. permanent mould casting.
10. Refractory slurry is used in
a. shell-mould casting b. centrifugal casting c. investment casting d. die casting.
Possible answers to self check questions
| 1. | b | 2. | b |
| 3. | a | 4. | c |
| 5. | b | 6. | a |
| 7. | a | 8. | a |
| 9. | c | 10. | c |