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The_____ of the metal is used to cut it using an oxy-acetylene flame.
- Intensive oxidation
- Evaporation
- Both A and B
- None of these
- N/A
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Answer: A Explanation: -
Case hardening is the only process suited for hardening low carbon steel. A case hardening procedure is defined as which of the following?
- Intensive oxidation
- Evaporation
- Cyaniding
- All of these
- N/A
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Answer: C Explanation: -
When compared to the parent metal to be welded, the filler material used in welding should have .
- Same melting temperature
- Same composition
- Both A and B
- None of these
- N/A
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Answer: C Explanation: -
The temperature at which the magnetic property of iron disappears and its electrical conductivity and specific heat change is known as the 'Curie point,' which is measured in degrees Celsius.
- 760
- 456
- 345
- 900
- N/A
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Answer: A Explanation: -
A cupola requires approximately tonne of coke to make one tonne of casting.
- 0.4
- 0.3
- 0.05
- 0.04
- N/A
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Answer: B Explanation: -
According to the periodic table of elements, the atomic number increases with increasing atomic number. The atomic size is the same in both cases.
- Period decreases
- Group increases
- Both A and B
- None of these
- N/A
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Answer: C Explanation: -
Satellites burn out as they re-enter the Earth's atmosphere due to the
- Combustion with air
- Interaction with the Earth's atmosphere
- Both A and B
- None of these
- N/A
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Answer: B Explanation: -
The joining of thin foils is best accomplished by
- Microwaves
- X-rays
- Both A and B
- None of these
- N/A
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Answer: A Explanation: -
The electrical conductivity of a semiconductor decreases as temperature rises.
- Increases
- decreae
- Both A and B
- None of these
- N/A
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Answer: A Explanation: -
In the industries, laser welding is commonly used.
- mechanical
- electrical
- Both A and B
- None of these
- N/A
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Answer: B Explanation: