Workshop Technology problems
- 1. Cast iron and steel pipes are produced by
Options- A. slush casting
- B. investment casting
- C. true centrifugal casting
- D. die casting Discuss
Correct Answer: true centrifugal casting
- 2. 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
Correct Answer: 70% sand and 30% clay
- 3. The vertical welding do not require plate edge preparation upto 16 mm thickness.
Options- A. Correct
- B. Incorrect Discuss
Correct Answer: Correct
- 4. 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
Correct Answer: cold peening
- 5. 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
Correct Answer: The castings produced by centrifugal casting method have open and coarse grained structure.
- 6. 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
Correct Answer: upset butt welding
- 7. 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 Discuss
Correct Answer: direct current is used
- 8. The dowels are
Options- A. wooden nails
- B. box nails
- C. wire nails
- D. none of these Discuss
Correct Answer: wooden nails
- 9. 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
Correct Answer: larger than
- 10. 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
Correct Answer: Correct
More in Mechanical Engineering:
Programming
Copyright ©CuriousTab. All rights reserved.