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9 of 25 questions on this paper were also asked in other years. 2 more are types of question GTU sets again with new data. Each is marked below with the years it appeared.See all 11 repeated 3170909 questions, most asked first
What is Electrical and Magnetic Loading? Describe factors affecting Electrical and magnetic loading in electrical machines.
Also asked in Summer 2025 Q1c
For a transformer show that e.m.f. per turn Et = k√Q where Q = kVA rating. Explain how service condition of transformer affect the value of K
Design a 250KVA, 2000/400 Volt, 50 HZ, single phase, core type oil immersed self-cooled transformer with following data: Induced emf per turn = 15 Volt Max flux density Bm= 1.2 wb/m² Current density= 2.75 A/mm² Window space factor = 0.3 Height of the window Hw/ width of window Ww = 3 Assume 3 stepped core and Ai=0.6d², width of largest stamping a= 0.9d Determine the main dimensions of the core and yoke
Also asked in Summer 2025 Q3c
State why a turbo alternator has smaller diameter and large length but hydro alternator has larger diameter and small length
Also asked in Summer 2025 Q5a OR
synchronous machine
Define SCR applied to synchronous machine and prove that it is reciprocal of synchronous reactance.
Explain the difference between turbo and hydro alternator in a point of view of design.
Determine the main dimensions of a 12 MVA, 13.8KV, 50Hz, 1500 rpm, 3 star connected synchronous generator. The additional data is given as: Bav= 0.6wb/m², ac=42000 ac/m and peripheral speed= 80m/sec. Find also the maximum flux, the number of turns per phase and the number of conductors/slots if one conductor per slot is used, and. Assume kw =0.955
Also asked in Summer 2025 Q5c
Discuss factors affecting the length of air gap on performance of a three phase induction motor.
Also asked in Summer 2025 Q4b
Explain the effect of harmonic induction torque and harmonic synchronous torque on the performance of 3-ph induction motor.
Also asked in Summer 2025 Q4b OR
Briefly discuss factors affecting determining air gap length in induction motor design.
Discuss the effect of “skewing” on the performance of three phase induction motor.
State the rules for the selection of rotor slots in 3-phase squirrel cage induction motor.
Also asked in Summer 2025 Q4a OR
What is Dispersion coefficient? Explain the effect of Dispersion coefficient on maximum output power factor.
Also asked in Summer 2025 Q4a
Write a note on computer aided design of Induction motor. Explain flowchart to find main dimensions of induction motor.
Draw the flowchart for finding main dimensions of core and yoke in design of a transformer
Questions repeat across sessions. Working through two or three papers shows you which topics GTU asks most.
BE Electrical
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Official Gujarat Technological University (GTU) examination paper for AC Machine Design (Summer 2026, B.E. · Electrical Engineering, Sem 7). Features complete 70-mark regular & remedial examination pattern, official marking distribution across all 5 questions, and direct 1-click official PDF download.
Transcribed for student exam preparation from Gujarat Technological University official examination archives. Questions, syllabus guidelines, and curriculum marking schemes remain the intellectual property of Gujarat Technological University.
3170909 AC Machine Design
Official GTU PDF · Summer 2026
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