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- Question
The metal extrusion process is generally used for producing
Options- A. uniform solid sections
- B. uniform hollow sections
- C. uniform solid and hollow sections
- D. varying solid and hollow sections
- Correct Answer
- uniform solid and hollow sections
- 1. Sand wash 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 the 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
- 2. Extrusion
Options- A. is extensively used for making bolts and nuts
- B. is used for reducing the diameter of round bars and tubes by rotating dies which open and close rapidly on the work
- C. is used to improve fatigue resistance of the metal by setting up compressive stresses in its surface
- D. consists of pressing the metal inside a chamber to force it out by high pressure through an orifice which is shaped to provide the desired form of the finished part Discuss
- 3. The process of increasing the cross-section of a bar at the expense of its length, is called
Options- A. drawing down
- B. upsetting
- C. spinning
- D. peening Discuss
- 4. When the dimension is expressed as
, then the basic size is
Options- A. 20 mm
- B. 20.035 mm
- C. 20.025 mm
- D. 19.975 mm Discuss
- 5. A casting defect which occurs due to improper venting of sand is known as
Options- A. cold shuts
- B. blow holes
- C. shift
- D. swell Discuss
- 6. Cast iron and steel pipes are produced by
Options- A. slush casting
- B. investment casting
- C. true centrifugal casting
- D. die casting Discuss
- 7. 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
- 8. The vertical welding do not require plate edge preparation upto 16 mm thickness.
Options- A. Correct
- B. Incorrect Discuss
- 9. 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
- 10. 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
Workshop Technology problems
Search Results
Correct Answer: occurs near the ingates as rough lumps on the surface of a casting
Correct Answer: consists of pressing the metal inside a chamber to force it out by high pressure through an orifice which is shaped to provide the desired form of the finished part
Correct Answer: upsetting
Correct Answer: 20 mm
Correct Answer: blow holes
Correct Answer: true centrifugal casting
Correct Answer: 70% sand and 30% clay
Correct Answer: Correct
Correct Answer: cold peening
Correct Answer: The castings produced by centrifugal casting method have open and coarse grained structure.
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