Design Electrical Machines Online Test Online Exam Quiz
Design Electrical Machines Online Test GK Quiz. Question and Answers related to Design Electrical Machines Online Test. MCQ (Multiple Choice Questions with answers about Design Electrical Machines Online Test
How many techniques are used to plot the field form in salient pole machines?
Options
A : 2
B : 3
C : 4
D : 5
How many factors does the flux distribution in the rotating machines depend on?
Options
A : 2
B : 3
C : 4
D : 5
How many rules are to be followed while the flux plotting by method of curvilinear squares?
Options
A : 2
B : 3
C : 4
D : 5
How should the air gap and the fringing effects be if the field form of a salient pole machine is rectangular?
Options
A : air gap under the pole arc is not constant, fringing effects are considered
B : air gap under the pole arc is constant, fringing effects are considered
C : air gap under the pole arc is constant, fringing effects are not considered
D : air gap under the pole arc is not constant, fringing effects are not considered
What Is the formula for the amplitude of the fundamental curve?
Options
A : amplitude of the fundamental curve = 1.27 * flux density in the air gap * cosine (phase angle/2)
B : amplitude of the fundamental curve = 1.27 / flux density in the air gap * cosine (phase angle/2)
C : amplitude of the fundamental curve = 1.27 * flux density in the air gap / cosine (phase angle/2)
D : amplitude of the fundamental curve = 1/1.27 * flux density in the air gap * cosine (phase angle/2)
What is the formula of the flux density in the gap at a distance ‘x’ from the centre of the pole?
Options
A : flux density in the gap at a distance ‘x’ from the centre of the pole = length of air gap at the centre of pole * length of air gap at a distance ‘x’ from the centre of the pole * maximum flux density in air gap
B : flux density in the gap at a distance ‘x’ from the centre of the pole = length of air gap at the centre of pole / length of air gap at a distance ‘x’ from the centre of the pole * maximum flux density in air gap
C : flux density in the gap at a distance ‘x’ from the centre of the pole = length of air gap at the centre of pole * length of air gap at a distance ‘x’ from the centre of the pole / maximum flux density in air gap
D : flux density in the gap at a distance ‘x’ from the centre of the pole = 1/ length of air gap at the centre of pole * length of air gap at a distance ‘x’ from the centre of the pole * maximum flux density in air gap
What happens if the field form is symmetrical about the pole axis?
Options
A : north and south pole of a machine are similar
B : no harmonics
C : no cosine terms
D : north and south pole of a machine are similar, no harmonics, no cosine terms
What Is the formula of the permeance of the flux tube considering unit depth in the flux plotting technique?
Options
A : permeance of the flux tube = permeability in the air * mean width of flux tube * mean length of flux tube
B : permeance of the flux tube = permeability in the air / mean width of flux tube * mean length of flux tube
C : permeance of the flux tube = permeability in the air * mean width of flux tube / mean length of flux tube
D : permeance of the flux tube =1/ permeability in the air * mean width of flux tube * mean length of flux tube
How should the flux distribution be in the case of ac machines?
Options
A : sinusoidal
B : rectangular
C : square
D : circular
How is the flux distributed in the field form?
Options
A : to reduce the high voltage
B : to reduce the high current
C : to reduce the harmonics
D : to keep the total reluctance low
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