Workshop Technology problems
- 1. The upsetting is a process of
Options- A. increasing the cross-section of a bar
- B. reducing the cross-section of a bar
- C. joining the two surfaces of metal under pressure after heating
- D. bending of a bar Discuss
Correct Answer: increasing the cross-section of a bar
- 2. Which of the following statement is wrong?
Options- A. The angular clearance on dies varies from 0.5° to 1°.
- B. In drawing operation, the metal flows due to plasticity.
- C. In press operation, the size of the pierced hole is independent of the size of punch.
- D. none of the above Discuss
Correct Answer: none of the above
- 3. In spot welding, the distance between the nearest edge of the plate and centre of weld should be equal to
Options- A. d
- B. 1.5 d
- C. 3 d
- D. 6 d Discuss
Correct Answer: 1.5 d
- 4. When two metal pieces of different thicknesses are to be welded by projection welding, then the projections should be made on __________ metal piece.
Options- A. thinner
- B. thicker Discuss
Correct Answer: thicker
- 5. The material which can be best cut with oxygen cutting process is
Options- A. mild steel
- B. brass
- C. copper
- D. aluminium Discuss
Correct Answer: mild steel
- 6. The welding set up is said to have straight polarity, when
Options- A. work is connected to the positive terminal and the electrode holder to the negative terminal
- B. work is connected to the negative terminal and the electrode holder to the positive terminal
- C. work is connected to the positive terminal and the electrode holder is earthed
- D. work is connected to the negative terminal and the electrode holder is earthed Discuss
Correct Answer: work is connected to the positive terminal and the electrode holder to the negative terminal
- 7. During hot working of metals
Options- A. porosity of the metal is largely eliminated
- B. grain structure of the metal is refined
- C. mechanical properties are improved due to refinement of grains
- D. all of the above Discuss
Correct Answer: all of the above
- 8. In die casting, machining allowance is
Options- A. small
- B. large
- C. very large
- D. not provided Discuss
Correct Answer: not provided
- 9. Thermit, used in thermit welding, is a mixture of
Options- A. charcoal and iron oxide
- B. charcoal and aluminium
- C. iron oxide and aluminium
- D. charcoal, iron oxide and aluminium Discuss
Correct Answer: iron oxide and aluminium
- 10. Which of the following material can be used for making patterns?
Options- A. Aluminium
- B. Wax
- C. Lead
- D. all of these Discuss
Correct Answer: all of these
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