Chemical Engineering :: Chemical Engineering Basics-2
- Dies for wire drawing are generally made of
- When the wet steam is throttled but still remains wet at the exit of the throttle valve, then its temperature & dryness fraction respectively
- Surface tension is due to the __________ forces.
- Pick out the wrong statement.
- Which of the following is an example of stress corrosion ?
- Which of the following is not a characteristic observed in material failure by fatigue fracture ?
- While the oxy-acetylene flame produces a temperature of 3200°C, the temperature produced by oxy-hydrogen flame is about __________ °C.
- The total frictional resistance to fluid flow does not depend upon the
- In extrusion of metals, which of the following statement is true ?
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A.
A ferromagnetic material becomes paramagnetic above the 'Curie temperature' |
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B.
Permanent magnets are made of hard materials, whereas electromagnets require soft magnetic materials |
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C.
Soft magnetic materials (e.g., pure iron) have higher permeability and low hysterisis loss and coercive forces |
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D.
Tungsten steel and alnico are not hard magnetic materials |