A.lie under south pole
B.are farthest from the poles
C.lie under north pole
D.lie under interpolar region
Explanation: The correct answer is lie under interpolar region.
Submitted by: Academy of Pakistan
D.C. Generators in Electrical Engineering MCQs: 120 practice questions with answer choices and available explanations. Page 3 of 8.
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D.C. Generators
Showing page 3 of 8 · 120 total solved questions available.
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A.to reduce eddy current losses
B.to amplify voltage
C.to provide mechanical balance for the rotor
D.to enhance flux density
Explanation: The correct answer is to provide mechanical balance for the rotor.
Submitted by: Academy of Pakistan
A.dummy coils
B.compensating winding
C.shifting of axis of brushes
D.interpoles
Explanation: The correct answer is dummy coils.
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A.r.p.m. is less than 300
B.number of poles is 4
C.number of poles is 2
D.r.p.m. is more than 300
Explanation: The correct answer is number of poles is 2.
Submitted by: Academy of Pakistan
A.increases armature speed
B.reduces generator e.m.f.
C.reduces interpoles flux density
D.results in sparking trouble
Explanation: The correct answer is reduces generator e.m.f..
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A.more than no-load terminal voltage
B.less than no-load terminal voltage
C.negligibly low
D.equal to no-load terminal voltage
Explanation: The correct answer is equal to no-load terminal voltage.
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A.slots
B.poles
C.armature conductors
D.winding elements
Explanation: The correct answer is winding elements.
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A.lap winding
B.duplex winding
C.any of the above
D.wave moving
Explanation: The correct answer is lap winding.
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A.needle bearings
B.magnetic bearmgs
C.ball bearings
D.bush bearings
Explanation: The correct answer is ball bearings.
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A.32
B.16
C.4
D.8
Explanation: The correct answer is 8.
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A.creating residual magnetism by a D.C. source
B.neutralising residual magnetism
C.making the magnetic losses of forces parallel
D.increasing flux density by adding extra turns of windings on poles
Explanation: The correct answer is creating residual magnetism by a D.C. source.
Submitted by: Academy of Pakistan
A.shunt generator
B.long shunt compound generator
C.any of’the above
D.series generator
Explanation: The correct answer is long shunt compound generator.
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A.direction of flux
B.direction of motion of the conductor if forefinger points in the direction of generated e.m.f.
C.direction of induced e.m.f.
D.direction of motion of conductor, if forefinger points along the lines of flux
Explanation: The correct answer is direction of motion of conductor, if forefinger points along the lines of flux.
Submitted by: Academy of Pakistan
A.resistance wires
B.insulation pads
C.brazing
D.copper lugs
Explanation: The correct answer is copper lugs.
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A.that even number which is exact multiple of poles + 2
B.that even number which is exact multiple of poles
C.any even number of conductors
D.any odd number of conductors
Explanation: The correct answer is that even number which is exact multiple of poles + 2.
Submitted by: Academy of Pakistan