Discussion
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- Question
Cores are used to
Options- A. form internal cavities in the casting
- B. improve mould surface
- C. form a part of a green sand mould
- D. all of these
- Correct Answer
- all of these
- 1. In electric resistance welding, voltage required for heating is
Options- A. 1 to 5 volts
- B. 6 to 10 volts
- C. 11 to 20 volts
- D. 50 to 100 volts Discuss
- 2. In a cold chamber die casting machine, only non-ferrous alloys with __________ are casted.
Options- A. low melting temperature
- B. high melting temperature Discuss
- 3. A pouring basin acts as a reservoir for the molten metal.
Options- A. Agree
- B. Disagree Discuss
- 4. For welding plates of thickness more than 12.5 mm, its edges
Options- A. do not require bevelling
- B. should be bevelled to a single-V or U-groove
- C. should have a double-V or U-groove on one side
- D. should have a double-V or U-groove on both sides Discuss
- 5. Lancing is the operation of
Options- A. cutting a sheet of metal in a straight line along the length
- B. removal of metal to the desired shape from the edge of a plate
- C. cutting a sheet of metal through part of its length and then bending the cut portion
- D. bending a sheet of metal along a curved axis Discuss
- 6. For welding plates of thickness less than 5 mm, its edges
Options- A. do not require bevelling
- B. should be bevelled to a single-V or U-groove
- C. should have a double-V or U-groove on one side
- D. should have a double-V or U-groove on both sides Discuss
- 7. Shrinkage allowance is made by adding to external dimensions and subtracting from internal dimensions.
Options- A. Agree
- B. Disagree Discuss
- 8. Tandem drawing of wires and tubes is necessary because
Options- A. it is not possible to reduce at one stage
- B. annealing is needed between stages
- C. accuracy in dimensions is not possible otherwise
- D. surface finish improves after every drawing stage Discuss
- 9. In sheet metal work, the cutting force on the tool can be reduced by
Options- A. grinding the cutting edges sharp
- B. increasing the hardness of tool
- C. providing shear on tool
- D. increasing the hardness of die Discuss
- 10. An oxidising flame is obtained when equal volumes of oxygen and acetylene are supplied.
Options- A. True
- B. False Discuss
Workshop Technology problems
Search Results
Correct Answer: 6 to 10 volts
Correct Answer: high melting temperature
Correct Answer: Agree
Correct Answer: should have a double-V or U-groove on both sides
Correct Answer: cutting a sheet of metal through part of its length and then bending the cut portion
Correct Answer: do not require bevelling
Correct Answer: Agree
Correct Answer: annealing is needed between stages
Correct Answer: grinding the cutting edges sharp
Correct Answer: False
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