DC Machines - Introduction
QuotesDG
December 06, 2015
Direct Current machines are energy transfer devices. These machines can function as either a motor or a generator Two related physical princ...
Showing posts with label Electrical Machine. Show all posts
Showing posts with label Electrical Machine. Show all posts
Sunday, 6 December 2015
Tuesday, 18 December 2012
Electrical Machine Competitive Questions: Part-11
QuotesDG
December 18, 2012
Electrical Machine Competitive Questions with Answers: [1] A field excitation of 20A in a certain alternator results in an armature current ...
Monday, 10 September 2012
Electrical Machines: Part 6
QuotesDG
September 10, 2012
[1] In a transformer the voltage regulation will be zero when it operates at (a) Unity p.f. (b) Leading p.f. (c) Lagging p.f. (d) Zero p.f. ...
Sunday, 9 September 2012
Electrical Machines: Part 5
QuotesDG
September 09, 2012
[1] A stepper motor is (a) A dc motor. (b) A single-phase ac motor. (c) A multi-phase motor. (d) A two phase motor. Answer: D Stepper motor ...
Saturday, 8 September 2012
Electrical Machines: Part 3
QuotesDG
September 08, 2012
[1]The size of the feeder is determined primarily by (a) The current it is required to carry. (b) The percent variation of voltage in the fe...
Wednesday, 5 September 2012
Electrical Machines: Part 4
QuotesDG
September 05, 2012
[1] The torque-speed characteristics of an a.c. operated universal motor has a ______characteristic and it______ be started under no-load co...
Sunday, 2 September 2012
Electrical machines: Part 2
QuotesDG
September 02, 2012
[1] In a DC motor, unidirectional torque is produced with the help of a. Brushes b. Commutator c. End-plates d. Both a and b Answer: D [2] T...
Tuesday, 21 August 2012
Electrical Machine: Part 1
QuotesDG
August 21, 2012
Electrical Machines Questions and Answers [1] A salient pole synchronous motor is running at no load. Its field current is switched off. Th...
