Discussion
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- Question
For gas welding, the presure desired at the welding torch for acetylene is
Options- A. 7 to 103 kN/m2
- B. 70 to 280 kN/m2
- C. 280 to 560 kN/m2
- D. 560 to 840 kN/m2
- Correct Answer
- 7 to 103 kN/m2
- 1. Structural sections such as rails, angles, I-beams are made by
Options- A. hot rolling
- B. hot drawing
- C. hot piercing
- D. hot extrusion Discuss
- 2. Thermit welding is often used in
Options- A. replacing broken gear teeth
- B. repairing broken shears
- C. joining rails, truck frames and locomotive frames etc.
- D. all of the above Discuss
- 3. In welding magnesium with TIG arc welding, direct current with __________ is used.
Options- A. straight polarity
- B. reversed polarity Discuss
- 4. The casting method adopted for ornaments and toys of non-ferrous alloys, is
Options- A. permanent mould casting
- B. slush casting
- C. die casting
- D. centrifugal casting Discuss
- 5. The cold chisels are made from
Options- A. cast iron
- B. mild steel
- C. high speed steel
- D. cast tool steel Discuss
- 6. 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
- 7. 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
- 8. The most preferred process for casting gas turbine blades is
Options- A. die casting
- B. shell moulding
- C. investment moulding
- D. sand casting Discuss
- 9. 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
- 10. 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
Workshop Technology problems
Search Results
Correct Answer: hot rolling
Correct Answer: all of the above
Correct Answer: reversed polarity
Correct Answer: slush casting
Correct Answer: cast tool steel
Correct Answer: all of these
Correct Answer: melting pot is separate from the machine
Correct Answer: shell moulding
Correct Answer: parting sand
Correct Answer: sand wash
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