HAL Model Question Papers with answers 2019 Sample paper Free Download.
HAL Model | Sample | Mock Test Question Paper for 2019 Exam, This HAL Question are based on the syllabus but here some of the question may out of syllabus, just for your better exam preparation.
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1) the purpose of feedback transformer & diode in complementary commutated inverters is to-
2) in order to obtain static voltage equalization in series connected SCR’s connection r made of- (this question repeated) (i.e. 2 times same question Haaa)
3) in phase controlled rectification PF=
4) Why sector winding is used in synchronous motor?
5) A calculation of making current where MVA & KV was given.
6) The o?p voltage e1 & e2 of 2 full-bridge inverters added using o/p transformer. In order to eliminate 5th harmonic from o/p voltage, the phase angle between e1&e2 will be-
7) A single phase fully controlled line commutated ac-dc converter operates as an inverter when-
8) An SCR has half cycle surge current rating of 3000A for 50Hz. One cycle surge current will be. (double of that)
9) When compared to an symmetrical thyristor, the turn off time & reverse blocking voltage of an asymmetrical thyristor will be-