Discussion
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- Question
For arc welding
Options- A. alternating current with high frequency is used
- B. alternating current with low frequency is used
- C. direct current is used
- D. any one of these
- Correct Answer
- direct current is used
- 1. The welding process used to join the ends of two pipes of uniform cross-section, is
Options- A. spot welding
- B. seam welding
- C. projection welding
- D. upset butt welding Discuss
- 2. Which of the following statement is wrong?
Options- A. The hot chamber die casting machine is used for casting zinc, tin, lead and other low melting alloys.
- B. The cold chamber die casting machine is used for casting aluminium, magnesium, copper base alloys and other high melting alloys.
- C. The castings produced by centrifugal casting method have open and coarse grained structure.
- D. all of the above Discuss
- 3. The process used to improve fatigue resistance of the metal by setting up compressive stresses in its surface, is known as
Options- A. hot piercing
- B. extrusion
- C. cold peening
- D. cold heading Discuss
- 4. The vertical welding do not require plate edge preparation upto 16 mm thickness.
Options- A. Correct
- B. Incorrect Discuss
- 5. Green 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
- 6. The dowels are
Options- A. wooden nails
- B. box nails
- C. wire nails
- D. none of these Discuss
- 7. In a four high rolling mill, the diameter of backing up rolls is __________ the diameter of working rolls.
Options- A. equal to
- B. smaller than
- C. larger than Discuss
- 8. Fin is a casting defect which is due to thin projections of metal not intended as a part of casting.
Options- A. Correct
- B. Incorrect Discuss
- 9. Seam weiding is a
Options- A. continuous spot welding process
- B. multi-spot welding process
- C. arc welding process
- D. process used for joining round bars Discuss
- 10. For smoothing and cleaning out depressions in the mould, a __________ is used.
Options- A. slick
- B. lifter
- C. swab
- D. gagger Discuss
Workshop Technology problems
Search Results
Correct Answer: upset butt welding
Correct Answer: The castings produced by centrifugal casting method have open and coarse grained structure.
Correct Answer: cold peening
Correct Answer: Correct
Correct Answer: 70% sand and 30% clay
Correct Answer: wooden nails
Correct Answer: larger than
Correct Answer: Correct
Correct Answer: continuous spot welding process
Correct Answer: lifter
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