What is the value of ratio of gross core area to the area of circumscribing circle in stepped cores?(a) 0.71(b) 0.79(c) 0.89(d) 0.91I got this question by my college professor while I was bunking the class.Query is from Design of Core and Winding topic in portion Design of Transformers of Design of Electrical Machines

What is the value of ratio of gross core area to the area of circumscr

1.	What is the value of ratio of gross core area to the area of circumscribing circle in stepped cores?(a) 0.71(b) 0.79(c) 0.89(d) 0.91I got this question by my college professor while I was bunking the class.Query is from Design of Core and Winding topic in portion Design of Transformers of Design of Electrical Machines
Answer» The correct choice is (B) 0.79 To explain I WOULD say: 0.71 is the RATIO of NET core AREA to the area of circumscribing circle in stepped cores. The gross core area for stepped cores is 0.618 * d^2.

Discussion

No Comment Found

Related InterviewSolutions

The axial length of 16 coils = axial length of each coil * 16.(a) true(b) falseThe question was posed to me at a job interview.I would like to ask this question from Overall Dimensions topic in portion Design of Transformers of Design of Electrical Machines
What is the formula for number of turns/coil axially?(a) number of turns/coil axially = axial length / diameter of the insulated conductor(b) number of turns/coil axially = axial length * diameter of the insulated conductor(c) number of turns/coil axially = axial length – diameter of the insulated conductor(d) number of turns/coil axially = axial length + diameter of the insulated conductorThe question was posed to me during an interview.My doubt stems from Overall Dimensions in division Design of Transformers of Design of Electrical Machines
What is the relation of the height of the window with the winding height with respect to the rectangular conductors?(a) winding height = 60% * window height(b) winding height = 50% * window height(c) winding height = 80% * window height(d) winding height = 70% * window heightI have been asked this question in exam.My question is taken from Overall Dimensions topic in division Design of Transformers of Design of Electrical Machines
What is the range for the current density at HT side for a distribution transformer?(a) 2.4-3.5 Amp per mm^2(b) 2-2.5 Amp per mm^2(c) 1-3.5 Amp per mm^2(d) 2-3.5 Amp per mm^2I got this question by my school principal while I was bunking the class.My question is based upon Overall Dimensions topic in section Design of Transformers of Design of Electrical Machines
What is the assumption for width of the largest stamping for the stepped core transformer?(a) 0.9*d(b) 0.71*d(c) 0.85*d(d) 0.8*dThe question was asked in an internship interview.My question is taken from Overall Dimensions in portion Design of Transformers of Design of Electrical Machines
What is the formula for the inside diameter of the low voltage windings?(a) inside diameter = diameter of the circumscribing circle + pressboard thickness insulation between l.v winding and core(b) inside diameter = diameter of the circumscribing circle – pressboard thickness insulation between l.v winding and core(c) inside diameter = diameter of the circumscribing circle + 2*pressboard thickness insulation between l.v winding and core(d) inside diameter = diameter of the circumscribing circle – 2* pressboard thickness insulation between l.v winding and coreI have been asked this question in a national level competition.I'm obligated to ask this question of Overall Dimensions in division Design of Transformers of Design of Electrical Machines
What is the formula for the window clearance of the transformer?(a) window clearance = (height of the window + axial depth)/2(b) window clearance = (height of the window – axial depth)(c) window clearance = (height of the window – axial depth)/2(d) window clearance = (height of the window + axial depth)I had been asked this question in homework.The doubt is from Overall Dimensions topic in portion Design of Transformers of Design of Electrical Machines
What is the formula to calculate the radial depth of low voltage windings?(a) radial depth of the lv windings = number of layers * radial depth of the conductors * insulation between layers(b) radial depth of the lv windings = number of layers * radial depth of the conductors – insulation between layers(c) radial depth of the lv windings = number of layers / radial depth of the conductors + insulation between layers(d) radial depth of the lv windings = number of layers * radial depth of the conductors + insulation between layersI got this question during an interview.I would like to ask this question from Overall Dimensions topic in section Design of Transformers of Design of Electrical Machines
What is the formula for axial depth of low voltage winding?(a) axial depth = number of secondary turns / width of the conductor(b) axial depth = number of secondary turns * width of the conductor(c) axial depth = number of secondary turns + width of the conductor(d) axial depth = number of secondary turns – width of the conductorThe question was posed to me during an interview for a job.Question is from Overall Dimensions topic in chapter Design of Transformers of Design of Electrical Machines
What is the formula for the conductor dimensions in transformer?(a) conductor dimensions = conductor width * conductor thickness + 0.5 mm(b) conductor dimensions = conductor width / conductor thickness + 0.5 mm(c) conductor dimensions = conductor width + conductor thickness + 0.5 mm(d) conductor dimensions = conductor width – conductor thickness + 0.5 mmI have been asked this question by my school teacher while I was bunking the class.Question is taken from Overall Dimensions in division Design of Transformers of Design of Electrical Machines

Discussion

No Comment Found

Related InterviewSolutions

Reply to Comment