Other members of the family are the directcurrent dc motor or generator, the induction motor or generator, and a number of derivatives of all these three. Approach is stable value somewhere between zero and infinity. Steel rolling mills, printing press, textile mills and paper mills employing dc motor drives. Learn and practice the placement papers of hal and find out how much. Jb gupta electrical engineering objective mcq book free pdf download. Practically it is not possible to develop an exact 50% of maximum power because in that case, the current would be much beyond the rated current of the motor. Noload speed of which of the following motor will be highest. Free download pdf mcq on converters and rectifiers. In this post provide you latest and updated 2018 electrical mcq objective questions with answer which are help for preparation all electrical engineering exams like gate, ies, jto, psus, rrb jeaen, rrb loco pilot and technicians, ssc je, dmrc, lmrc, isro and other state level engineering exams. As 5000 free distribution is over, now this content is locked.
Dc motor electrical machine engineering multiple choice questions and answers,dc motor objective questions answers pdf preparation for gate. If the pole flux of a dc motor approaches zero,its speed will a. Its operation is based on the principle that when a current carrying conductor is placed in a. This video provides all the important mcq questions of dc motor in detail and also provides some important points to remember for interviews. Motors multiple choice and answers for freshers and experienced top list of d. Multiple choice questions mcqs on dc motor electrical ride. Noload speed of which of the following motor is highest. Dc motor or direct current motor multiple choice questions.
Automobile engineering important multiple choice questions with answers pdf file free download. In this post provide you latest and updated 2018 electrical mcq objective questions with answer which are help for. Dc motor or direct current motor multiple choice questions and answers. Dc motors electrical engineering questions and answers. Brushed dc motor fundamentals microchip technology. A dc series motor should not be started on no load because it would a. Ward leonard method of speed control is basically a a field control method. Great pdf to practice electrical and electronics fundamentals.
This dc motor test contains around 20 questions of multiple choice with 4 options. Expected dc motor objective questions mcq 1 25 electrical engg in hindi. An905 ds00905bpage 2 2010 microchip technology inc. Dc motors although ac motors are used in most of the cases, dc motors have many applications and used for multipurpose applications. Mention some of the applications of controlled rectifier. These mcqs are very important for preparation of gate, fpsc, nts, kppsc, ppsc and other job tests.
Motors, electrical engineering multiple choice questions objective type questions, mcqs, with question and answers, download free pdf, electrical engineering, multiple choice questions, objective. Electrical engineering objective questions mcq with answer. Interview questions electrical ac dc motors interview questions whyelectrical ac dc motors interview questions placement papers. Three phase ac circuits mcqs with explanatory answers. C motor electrical machine multiple choice questions and. A brushless dc motor also known as a bldc motor or bl motor is an electronically commuted dc motor which does not have brushes. It is a synchronous brushless motor where a full rotation is divided into a number of steps. Brushes and commutator unlike other electric motor types i. Dc motor principle a machine that converts dc power into.
This type of breaking is called as regenerative breaking. Interview questions electrical ac dc motors interview. First, a look at an incredibly simpli ed motor, a square loop in a magnetic eld, as shown in figure 1. Part 7 1 the basic requirement of a dc armature winding is that it must be a a closed one b a lap winding c a wave winding d either b. Following electrical engineering multiple choice objective type questions and answers will help you in bsnl jto, gate. A stepper motor is a type of dc motor that works in discrete steps. Brushed dc motors, despite their mechanical complexity, are governed by only a few forces. Automobile engineering important multiple choice questions with answers pdf file fr. Jb gupta free pdf books cover all electrical engineering topic and contain 12000 mcq. Motors mcq question is the important chapter for a electrical engineering and gate students. Dc motor principle a machine that converts dc power into mechanical energy is known as dc motor. It converts fixed ac voltage into variable dc voltage.
Single phase induction motors multiple choice questions. The output power of any electrical motor is taken from the a armature b field c coupling mounted on the shaft d motor frame ans. Dc machines quiz questions electrician exams practice tests. If the load on a dc shunt motor is increased, its speed decreases primarily due to. The rotor and stator are each connected from a different power supply, this. Multiple choice questions test dc motors set 08 objectivebooks. The rotor and stator windings are connected in parallel. Electrical engineering objective questions mcq with answer free pdf download. Dc machines electrical engineering mcq questions and answers home category electrical engineering mcq questions and answers dc machines 1 if e b is the back emf of d. Free download 100 mcq objective type questions on converters and rectifiers. Motors subjective, objective questions, mcqs solution.
Motors interview objective type questions pdf free download. No change due to the corresponding change in back emf. Newest dcmotor questions electrical engineering stack. Important 50 dc motor mcq questions and answers morning. Dc machines electrical engineering mcq questions and. You will get all the dc motor mcq important question and answer with explanation for your all electrical engineering competitive exams 1. Mechanical engineering all subjects multiple choice questions with answers practice test series. Multiple choice questions assertionreason type questions matching. In a split phase motor, the running winding should have a high resistance and low inductance b low resistance and high inductance c.
When a current carrying conductor is placed in a magnetic field, it experiences a torque and has a tendency to move. Dc motor applications tecowestinghouse motor company dc motors are ideally suited to a multitude of industrial and marine applications in which high torque and variable speed are required. The dc motor develops maximum power when the back emf is half the applied voltage is e b v 2. The induced emf in the armature conductors of a dc motor is a. Three phase ac circuits mcqs with explanatory answers 1. Jb gupta electrical engineering objective mcq book free.
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