Workshop Technology problems
- 1. The purpose of a gate is to
Options- A. deliver molten metal into the mould cavity
- B. act as a reservoir for the molten metal
- C. feed the molten metal to the casting in order to compensate for the shrinkage
- D. deliver molten metal from pouring basin to gate Discuss
Correct Answer: deliver molten metal into the mould cavity
- 2. Riddle is used for
Options- A. smoothing and cleaning out depressions in the mould
- B. cleaning the moulding sand
- C. moistening the sand around the edge before removing pattern
- D. reinforcement of sand in the top part of moulding box Discuss
Correct Answer: cleaning the moulding sand
- 3. A basic hole is one whose
Options- A. lower deviation is zero
- B. upper deviation is zero
- C. lower and upper deviations are zero
- D. none of these Discuss
Correct Answer: lower deviation is zero
- 4. Which one of the following material will require the largest size of riser for the same size of casting?
Options- A. Aluminium
- B. Cast iron
- C. Steel
- D. Copper Discuss
Correct Answer: Steel
- 5. The maximum flame temperature occurs
Options- A. at the outer cone
- B. at the inner cone
- C. between the outer and inner cone
- D. at the torch tip Discuss
Correct Answer: at the inner cone
- 6. Slick is used for repairing and finishing the mould.
Options- A. Correct
- B. Incorrect Discuss
Correct Answer: Correct
- 7. Shift is a casting defect which
Options- A. results in a mismatching of the top and bottom parts of a casting
- B. results in general enlargement of a casting
- C. occurs near the ingates as rough lumps on the surface of a casting
- D. occurs as sand patches on the upper surface of a casting Discuss
Correct Answer: results in a mismatching of the top and bottom parts of a casting
- 8. In welding aluminium with TIG arc welding, alternating current is used.
Options- A. Correct
- B. Incorrect Discuss
Correct Answer: Correct
- 9. A large electrode is used in un-shielded arc welding.
Options- A. Correct
- B. Incorrect Discuss
Correct Answer: Correct
- 10. Linde welding uses
Options- A. neutral flame and right-ward technique
- B. oxidising flame and left-ward technique
- C. neutral flame and left-ward technique
- D. carburising flame and right-ward technique Discuss
Correct Answer: carburising flame and right-ward technique
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