Design Electrical Machines Pole Design Online Exam Quiz

Design Electrical Machines Pole Design GK Quiz. Question and Answers related to Design Electrical Machines Pole Design. MCQ (Multiple Choice Questions with answers about Design Electrical Machines Pole Design

What should be the range of the field mmf to armature mmf ratio at full load?

Options

A : 1.0-1.2

B : 1.1-1.3

C : 1.3-1.5

D : 1.1-1.25

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What is the range of the flux density in the pole shrank for laminated poles?

Options

A : 1.1-1.7 Wb per m2

B : 1.2-1.6 Wb per m2

C : 1.3-1.7 Wb per m2

D : 1.2-1.7 Wb per m2

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What is the range of leakage coefficient for output of 100kW?

Options

A : 1.12-1.25

B : 1.11-1.22

C : 1.10-1.20

D : 1.11-1.15

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What is the range of leakage coefficient for output of 1000kW?

Options

A : 1.12-1.25

B : 1.11-1.22

C : 1.09-1.18

D : 1.08-1.16

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What is the flux in the pole body, given leakage coefficient = 1.2 and the useful flux per pole is 10 weber?

Options

A : 12 weber

B : 11.2 weber

C : 8.2 weber

D : 20 weber

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What is the formula for the area of the poles shrank of the laminated poles?

Options

A : area of the pole shrank = flux in the pole body * magnetic field

B : area of the pole shrank = flux in the pole body + magnetic field

C : area of the pole shrank = flux in the pole body – magnetic field

D : area of the pole shrank = flux in the pole body / magnetic field

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How should the field mmf be with respect to armature mmf to reduce the armature reaction?

Options

A : armature mmf > field mmf

B : armature mmf >= field mmf

C : armature mmf < field mmf

D : armature mmf = field mmf

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What is the relationship between flux in the pole body and the useful flux per pole?

Options

A : flux in the pole body is directly proportional to useful flux per pole

B : flux in the pole body is indirectly proportional to the useful flux per pole

C : flux in the pole body is directly proportional to the square of useful flux per pole

D : flux in the pole body is indirectly proportional to the square of useful flux per pole

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What should be the length of pole with respect to the length of the armature and what should be the range of the length of pole?

Options

A : length of pole < length of armature, 10-15 m

B : length of pole > length of armature, 10-15 mm

C : length of pole > length of armature, 10-15 cm

D : length of pole < length of armature, 10-15 mm

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What are the factors the design of poles of the DC machine depends on?

Options

A : length, breadth, height of the conductors

B : area of cross section of poles

C : area of cross section of poles and height of the poles

D : area of cross section of poles and height of the poles and the design of field windings

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