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What is the thickness of the flanges and what material is used in the flanges?
Answer: d Explanation: The flanges used in the Class B insulation is made up of 10 mm thickness. The flanges are made up of the bakelized asbestos.
Answer: d
See lessExplanation: The flanges used in the Class B insulation is made up of 10 mm thickness. The flanges are made up of the bakelized asbestos.
What material is the paper strips stuck with?
Answer: d Explanation: The paper strips used in the Class B insulation machines are stuck on with shellac. They are also made of the synthetic resin varnish materials.
Answer: d
See lessExplanation: The paper strips used in the Class B insulation machines are stuck on with shellac. They are also made of the synthetic resin varnish materials.
For machines with Class B insulation, how many layers of inter turn insulation is made use of and what is the distance between the layers?
Answer: c Explanation: The machines using Class B insulation makes use of 2 layers of inter turn insulation. The distance between the insulation is given to be 0.18 mm.
Answer: c
Explanation: The machines using Class B insulation makes use of 2 layers of inter turn insulation. The distance between the insulation is given to be 0.18 mm.
See lessWhat should be the maximum width of the edge conductors used in the large alternators?
Answer: a Explanation: The field coils of the large alternators use strip on edge winding wherein the bare copper strips are insulated from each other by interturn insulation. The width of the edge conductors does not exceed 6 mm.
Answer: a
Explanation: The field coils of the large alternators use strip on edge winding wherein the bare copper strips are insulated from each other by interturn insulation. The width of the edge conductors does not exceed 6 mm.
See lessWhat type of strips is made use of for field coils of small alternators?
Answer: c Explanation: The glass covered rectangular strips are made use of for the field coils of small alternator. The bare copper strips are being used are made use of for the field coils of large alternator.
Answer: c
Explanation: The glass covered rectangular strips are made use of for the field coils of small alternator. The bare copper strips are being used are made use of for the field coils of large alternator.
See lessWhat type of coils are made use of for machines with small number of poles?
Answer: b Explanation: Different type of coils are being made use of for the machines as per the quantity of number of poles. For small number of poles the wire wound coils are made use of.
Answer: b
Explanation: Different type of coils are being made use of for the machines as per the quantity of number of poles. For small number of poles the wire wound coils are made use of.
See lessWhat is the formula for the area of cross section of armature conductors?
Answer: d Explanation: For obtaining the area of the cross section the current per conductor is calculated. Next the current density is calculated and the ratio of both gives the current density of the area of cross section.
Answer: d
Explanation: For obtaining the area of the cross section the current per conductor is calculated. Next the current density is calculated and the ratio of both gives the current density of the area of cross section.
See lessWhat is the permissible current density in the armature conductors?
Answer: d Explanation: The minimum permissible value of the current density in the armature conductors is 3 A per mm2. The maximum allowed value of the current density in the armature conductors is 6 A per mm2.
Answer: d
Explanation: The minimum permissible value of the current density in the armature conductors is 3 A per mm2. The maximum allowed value of the current density in the armature conductors is 6 A per mm2.
See lessWhat is the formula for current in each conductor?
Answer: c Explanation: The kVA output is first obtained from the operation of the machine. Next the voltage per phase is calculated to obtain the current in each conductor.
Answer: c
See lessExplanation: The kVA output is first obtained from the operation of the machine. Next the voltage per phase is calculated to obtain the current in each conductor.
What is the formula for the turns per phase in the armature design?
Answer: a Explanation: For obtaining the turns per phase, the voltage per phase is obtained along with the parallel paths per phase. Next the winding space factor is calculated and the substitution in the formula gives the turns per phase.
Answer: a
Explanation: For obtaining the turns per phase, the voltage per phase is obtained along with the parallel paths per phase. Next the winding space factor is calculated and the substitution in the formula gives the turns per phase.
See less