19) The hysteresis loss in a given magnetic material may be decreased by

laminating it

increasing flux density through it

increasing frequency of reversal of magnetisation

decreasing maximum flux density established through it

Answer is:

decreasing maximum flux density established through it

RRB JE Mechanical Question Paper 2014 (Set-1) with Answer Key

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20) Vacuum is considered as

Non-magnetic material

Diamagnetic material

Paramagnetic material

Ferromagnetic material

Answer is:

Non-magnetic material

21) Bakelite is a/an

insulator

semiconductor

high resistance conductor

Low resistance conductor

Answer is:

insulator

22) Losses which do not occur in transformer but do occur in rotating electric machine are

Copper losses

Magnetic losses

Friction and windage losses

Hysteresis and eddy current losses

Answer is:

Friction and windage losses

23) In Fleming's Right Hand rule, the thumb points towards

direction of flux

direction of induced e.m.f

direction of motion of conductor, if fore finger points along the lines of flux

direction of motion of the conductor if fore finger points in the direction of generated e.m.f.

Answer is:

direction of motion of conductor, if fore finger points along the lines of flux

RRB JE Mechanical Question Paper 2014 (Set-1) with Answer Key

For more MCQ's Click Here

19) The hysteresis loss in a given magnetic material may be decreased by

decreasing maximum flux density established through it

RRB JE Mechanical Question Paper 2014 (Set-1) with Answer Key

Related RRB JE Mechanical Question Paper 2014 (Set-1) with Answer Key

20) Vacuum is considered as

Non-magnetic material

21) Bakelite is a/an

insulator

22) Losses which do not occur in transformer but do occur in rotating electric machine are

Friction and windage losses

23) In Fleming's Right Hand rule, the thumb points towards

direction of motion of conductor, if fore finger points along the lines of flux

RRB JE Mechanical Question Paper 2014 (Set-1) with Answer Key