Discussion
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- Question
If an aluminium pattern made from a wooden master pattern is to be used for grey iron castings, then the shrinkage allowance allowed on the wooden pattern should be
Options- A. 10 mm/m
- B. 16 mm/m
- C. 20 mm/m
- D. 26 mm/m
- Correct Answer
- 26 mm/m
- 1. The metal patterns as compared to wooden patterns require less
Options- A. shrinkage allowance
- B. machining allowance
- C. draft allowance
- D. distortion allowance Discuss
- 2. The acetylene cylinder is usually painted with
Options- A. black colour
- B. white colour
- C. maroon colour
- D. yellow colour Discuss
- 3. The welding process used in joining mild steel shanks to high speed drills, is
Options- A. spot welding
- B. seam welding
- C. flash butt welding
- D. upset butt welding Discuss
- 4. Swab is used for
Options- A. smoothing and cleaning out depressions in the mould
- B. cleaning the moulding sand
- C. moistening the sand around the edge before removing pattern
- D. reinforcement of sand in the top part of the moulding box Discuss
- 5. The hot working of metals is carried out
Options- A. at the recrystallisation temperature
- B. below the recrystallisation temperature
- C. above the recrystallisation temperature
- D. at any temperature Discuss
- 6. The diaphragm moulding machine is used to
Options- A. ram the sand harder at the pattern face with decreasing hardness towards the back of the mould
- B. ram the sand harder at the back of the mould and softer on the pattern face
- C. produce uniform packing of sand in the mould
- D. give uniform sand hardness throughout the mould Discuss
- 7. The difference between the upper limit and lower limt of a dimension is called
Options- A. nominal size
- B. basic size
- C. actual size
- D. tolerance Discuss
- 8. When the molten metal is fed in the cavity of a metallic mould by gravity, the method of casting is known as
Options- A. die casting method
- B. slush casting method
- C. permanent mould casting method
- D. centrifugal casting method Discuss
- 9. When the file is moved to and fro over the work, it is known as
Options- A. cross filing
- B. draw filing
- C. pull and push filing
- D. none of these Discuss
- 10. The two rolls in a two high rolling mills are of __________ size.
Options- A. equal
- B. different Discuss
Workshop Technology problems
Search Results
Correct Answer: draft allowance
Correct Answer: maroon colour
Correct Answer: flash butt welding
Correct Answer: moistening the sand around the edge before removing pattern
Correct Answer: above the recrystallisation temperature
Correct Answer: give uniform sand hardness throughout the mould
Correct Answer: tolerance
Correct Answer: permanent mould casting method
Correct Answer: draw filing
Correct Answer: equal
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