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Electrical steel: Quiz

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Question 1: These compounds, even in particles as small as one micrometer in diameter, increase ________ while also decreasing magnetic permeability.
ElectricityHysteresisMagnetic fieldMagnetism

Question 2: The carbon level can be reduced by annealing the steel in a decarburizing atmosphere, such as ________.
OxygenHeliumNitrogenHydrogen

Question 3: Carbon also causes ________ aging when it slowly leaves the solid solution and precipitates as carbides, thus resulting in an increase in power loss over time.
ElectromagnetismMagnetic momentMagnetismMagnetic field

Question 4: When alloying, the concentration levels of ________, sulfur, oxygen and nitrogen must be kept low, as these elements indicate the presence of carbides, sulfides, oxides and nitrides.
CarbonGoldUraniumAluminium

Question 5: Manganese and ________ can be added up to 0.5%.
GoldTitaniumCopperAluminium

Question 6: ________ - 47.2E-8 (Ω m) (example for 3% silicon content)
CarbonAluminiumSilverResistivity

Question 7: The magnetic properties of electrical steel are dependent on ________, as increasing the average crystal size decreases the hysteresis loss.
Metalworking terminologyCoining (metalworking)Heat treatmentRolling (metalworking)

Question 8: Silicon significantly increases the electrical resistivity of the steel, which decreases the induced ________ and thus reduces the core loss.
ElectromagnetismElectromotive forceEddy currentMaxwell's equations

Question 9: Increasing the amount of silicon inhibits eddy currents and narrows the ________ of the material, thus lowering the core losses.
ElectricityMagnetismMagnetic fieldHysteresis

Question 10: The material is usually manufactured in the form of ________ strips less than 2 mm thick.
MetalworkingRolling (metalworking)Metalworking terminologyHeat treatment







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