Design Electrical Machines Frames Dc Ac Machines Online Exam Quiz
Design Electrical Machines Frames Dc Ac Machines GK Quiz. Question and Answers related to Design Electrical Machines Frames Dc Ac Machines. MCQ (Multiple Choice Questions with answers about Design Electrical Machines Frames Dc Ac Machines
What is the formula for the breadth of the ac machine?
Options
A : breadth = 6 + 0.01 * inner diameter of frame
B : breadth = 6 – 0.01 * inner diameter of frame
C : breadth = 6 * 0.01 * inner diameter of frame
D : breadth = 6 / 0.01 * inner diameter of frame
What is the formula of the centrifugal force?
Options
A : centrifugal force = weight of revolving body * 39.43 * speed2 * radius of circular path
B : centrifugal force = weight of revolving body / 39.43 * speed2 * radius of circular path
C : centrifugal force = weight of revolving body * 39.43 / speed2 * radius of circular path
D : centrifugal force = weight of revolving body * 39.43 * speed2 / radius of circular path
What is the formula for the depth of the yoke?
Options
A : depth of yoke = thickness/2
B : depth of yoke = thickness
C : depth of yoke = 2*thickness
D : depth of yoke = 3*thickness
What is the formula in order to check the rigidity?
Options
A : moment of inertia ? (weight of magnetic frame * radius2 * 10-6) / 225
B : moment of inertia ? (weight of magnetic frame * radius2 * 10-6) / 225
C : moment of inertia = (weight of magnetic frame * radius2 * 10-6) / 225
D : moment of inertia < (weight of magnetic frame * radius2 * 10-6) / 225
What is the formula for the checking of rigidity of induction machines?
Options
A : moment of inertia ? radius / length of stator core * 90
B : moment of inertia ? radius * length of stator core * 90
C : moment of inertia ? radius * length of stator core / 90
D : moment of inertia ? radius / length of stator core * 90
What is the formula for the radius at the centre of gravity?
Options
A : radius at the centre of gravity = inner diameter1.5/6.3
B : radius at the centre of gravity = inner diameter2/6.3
C : radius at the centre of gravity = outer diameter1.5/6.3
D : radius at the centre of gravity = outer diameter2/6.3
What is the formula for the thickness of the ac machines?
Options
A : thickness = 40 * inner diameter of frame/12
B : thickness = 40 + inner diameter of frame/12
C : thickness = 40 – inner diameter of frame/12
D : thickness = 40 * inner diameter of frame*12
Why is the length of the yoke made larger?
Options
A : to protect the armature windings
B : to cover the armature windings
C : to cover the field windings
D : to cover and protect the field windings
What is the work of the frame of dc machines?
Options
A : to reduce the voltage
B : to reduce the flux
C : to carry the flux
D : to carry the current
In large machines, the thickness is relatively larger to the diameter.
Options
A : true
B : false
C :
D :
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