Electrical Engineering MCQs

Page No. 107

_____________is viscoelastic?


a Cast-iron

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b Graphite

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cRubber

✓


dGlass

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View Answer Rubber

Solder is an alloy of______________?


acopper and aluminium

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b tin and lead

✓


cnickel, copper and zinc

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d silver, copper and lead

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View Answer tin and lead

In thermocouples which of the following pairs is commonly used ?


aCopper-constantan

✓


bAluminium-tin

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cSilver-German silver

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d Iron-steel

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View Answer Copper-constantan

Carbon electrodes are not used in_______________?


a GLS lamps

✓


belectric arc furnace

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c dry cells

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dcinema projectors

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View Answer GLS lamps

___________ is most commonly used for making magnetic recording tape?


aSilver nitrate

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bFerric oxide

✓


cSmall particles of iron

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dSilicon-iron

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View Answer Ferric oxide

__________ is the main constituent of glass?


aFe203

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bSi02

✓


cAI2O3

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dB2O3

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View Answer Si02

Overhead telephone wires are made of_____________?


a aluminium

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bsteel

✓


cACSR conductors

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dcopper

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View Answer steel

Which of the following variety of copper has the best conductivity ?


aInduction hardened copper

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bHard drawn copper

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c Pure annealed copper

✓


dCopper containing traces of silicon

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Which of the following is the poorest conductor of electricity ?


aCarbon

✓


bSteel

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cSilver

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d Aluminium

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View Answer Carbon

Constantan contains_______________?


asilver and tin

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bcopper and tungsten

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ctungsten and silver

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d copper and nickel

✓


View Answer copper and nickel

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