Workshop Technology problems
- 1. The metal is subjected to mechanical working for
Options- A. refining grain size
- B. reducing original block into desired shape
- C. controlling the direction of flow lines
- D. all of these Discuss
Correct Answer: all of these
- 2. In a cold chamber die casting machine
Options- A. melting pot is separate from the machine
- B. melting pot is an integral part of the machine
- C. melting pot may have any location
- D. low temperature and pressure is used Discuss
Correct Answer: melting pot is separate from the machine
- 3. The most preferred process for casting gas turbine blades is
Options- A. die casting
- B. shell moulding
- C. investment moulding
- D. sand casting Discuss
Correct Answer: shell moulding
- 4. A sand employed on the faces of the pattern before moulding, is called
Options- A. green sand
- B. dry sand
- C. loam sand
- D. parting sand Discuss
Correct Answer: parting sand
- 5. A casting defect which occurs near the ingates as rough lumps on the surface of a casting is known as
Options- A. shift
- B. sand wash
- C. swell
- D. scab Discuss
Correct Answer: sand wash
- 6. The torch used for oxygen cutting is same as for oxy-acetylene welding.
Options- A. Yes
- B. No Discuss
Correct Answer: No
- 7. Loam sand is a mixture of
Options- A. 30% sand and 70% clay
- B. 50% sand and 50% clay
- C. 70% sand and 30% clay
- D. 90% sand and 10% clay Discuss
Correct Answer: 50% sand and 50% clay
- 8. In a cold chamber die casting machine, a measured quantity of molten metal is brought in a ladle from the melting pot to a chamber and forced into the closed die-section by applying hydraulic pressure upon the plunger.
Options- A. Correct
- B. Incorrect Discuss
Correct Answer: Correct
- 9. The operation of cutting a cylindrical hole in a sheet of metal by the punch and die is called
Options- A. shearing
- B. piercing
- C. punching
- D. blanking Discuss
Correct Answer: piercing
- 10. The minimum size of a bloom is
Options- A. 5 cm x 5 cm
- B. 10 cm x 10 cm
- C. 15 cm x 15 cm
- D. 20 cm x 20 cm Discuss
Correct Answer: 15 cm x 15 cm
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