26. In which of the following applications D.C. series motor is invariably tried a Starter for a car b Drive for a water pump c Fan motor d Motor operation in A.C. or D.C. Ans a 27. In D.C. machines fractional pitch winding is used a to improve cooling b to reduce copper losses c ...
DC Motor or Direct Current Motor Multiple Choice Questions and Answers. 1. The armature of DC machine is made up of laminated sheets to ..... A. Reduce hysterisis loss ... The function of a brush and commutator arrangement in a DC motor is ..... A. To produce unidirectional torque. B.
400 Important DC Motor MCQ - Electrical Engineering Important Multiple choice Questions and Answer PDF free download interview questions objective type questions.
May 05, 2021 Take DC Motor MCQ Test amp Online Quiz to test your Knowledge. Below is the DC Motor MCQ test that checks your basic knowledge of DC Motor.This DC Motor MCQ Test contains 20 Multiple Choice Questions.You have to select the right answer to the question. Finally, you can also take the Online Quiz from the Take DC Motor Quiz Button.
Q 31. In a differentially compounded D.C. motor, if shunt field suddenly opens. A The motor will first stop and then run in opposite direction as series motor. B The motor will work as series motor and run at slow speed in the same direction. C The motor will work as series motor and run at high speed in the same direction.
The brushes in a DC motor have two purposes. They carry current to the armature the rotating part. The brushes work with the commutator to switch the current to the proper winding of the armature as it rotates. This creates the correct magnet fields to make the motor run. Essentially, a brush is one contact of a switch the commutator is the ...
Learn D.C. Motors MCQ questions amp answers are available for a Electrical Engineering students to clear GATE exams, various technical interview, competitive examination, and another entrance exam. D.C. Motors MCQ question is the important chapter for a Electrical Engineering and GATE students.
Multiple Choice Questions with Answers on Refrigeration and Air-Conditioning - Set 07. Practice Test Question Set - 07 1. ... MCQ CS Algorithms MCQ CS Electronics MCQ CS Fundamentals MCQ CS MIS MCQ CS Organization MCQ Current Electricity MCQ DBMS MCQ DC Generators MCQ DC Motors MCQ Docks MCQ DOS MCQ Ele.
Jun 12, 2021 DC Direct Current Motors are two wire power amp ground, continuous rotation motors. When you supply power, a DC motor will start spinning until that power is removed.
A series-wound motor is known as a universal motor when it has been designed to operate on either AC or DC power. It operate well on AC because the current in both the field and the armature and hence the resultant magnetic fields will alternate in synchronism and hence, the resulting mechanical force will occur in a constant direction of ...
Apr 18, 2019 The Chapters of Multiple Choice Questions MCQs on DC Machines. This list is mainly about Multiple Choice Questions MCQs on DC Machines. So, we have covered all the possible sections of dc machines. For example, we have covered, the working principle of dc motors and working principle of dc generators.
250 TOP MCQs on BLDC Motors and Answers. DC Machines Multiple Choice Questions on BLDC Motors. 1. In BLDC motor field winding is kept on . Clarification Unlike conventional DC motor, BLDC motor has its field winding rotating. Unlike PMDC motor field winding is present. Thus, it is placed on rotor.
Multiple Choice Questions MCQs on Synchronous Motors. 1. A synchronous motor can operate at. 2. An unexcited single-phase synchronous motor is. D AC series motor. 3. The maximum power developed in the synchronous motor will depend on. 4.
Ques.4 If a hybrid stepper motor has a rotor pitch of 36 and a step angle of 9 , the number of its phases must be a4 b2 c3 d6 Answer A Ques.5 The rotor of a stepper motor has no
DC Motor Objective Questions with Answers. 46 How to obtain opposite polarity in adjacent poles of a 4 pole DC motor Varying the number of turns in coil. Making series connection of coils. Making parallel connection of coils. Making current flow in different direction. Answer Explanation.
DC Motor DC Motor Objective Questions with Answers. 36 Which type of instrument is used to test the armature winding Megger. Growler. Multimeter. Ohmmeter. Answer Explanation. Answer is Growler. Explanation 37 Why the holding coil ...
DC Motor or Direct Current Motor Multiple Choice Questions and Answers. 16. A DC motor can be looked upon as a DC generator with the power flow ..... A. Reduced . B. Reversed . C. Increased ... If the pole flux of a DC motor approaches zero,its speed will ..... A. Approach zero . B. Approach infinity . C.
Jul 21, 2020 Hello guys, welcome back to my blog. In this article, I will discuss dc motor MCQ or quiz, quiz questions for dc motors, or electrical interview questions related to dc motors. If you want an article on some other topics then comment us below in the comment section. You can also catch me Instagram Chetan Shidling.
D.C. Motors, Electrical Engineering Multiple Choice Questions Objective type questions, MCQs, with question and answers, download free PDF, Electrical Engineering, Multiple Choice Questions, Objective type questions, Electrical Engineering short notes, rapid fire notes, best theory
Sep 25, 2015 DC Motor DC Generator Multiple Choice Questions with Solutions 1 Which of the following statements is false a A DC motor converts electrical energy to mechanical energy b The efficiency of a DC motor is the ratio input power to output power
4 The fall in speed of a dc generator due to increase in load can be corrected by. A cooling the armature. B increasing the excitation. C reducing the load voltage. D increasing the input to the prime mover. Ans D. 5 A dc series generator is provided with divertor and is delivering its rated current.
We have summarized objective questions on motor vehicle act, which is the key source of information for motor vehicle inspector. The total no. of vacancies for the post of BPSC MVI is 90. If you are late, and missed out this opportunity dont worry about it.
Jan 09, 2019 DC motor objective questions answers pdf in hindi. January 18, 2021. January 9, 2019 by Electric Jankari. ITI Electrician Question paper Transformer Question answers posts . DC Motor ...
Feb 13, 2021 04. DC Motors Objective Type Question Answer In Hindi-4. Click Here. 05. DC Motors Objective Type Question Answer In Hindi-5. Click Here. 06. DC Motors Objective Type Question Answer In Hindi-6. Click Here.
The motor will reach such a high speed that the centrifugal force may destroy the motor windings Explanation 36 During the normal operation of a DC series motor, if the field winding is suddenly open-circuited, what will be the effect on the motor
A is not a self-starting motor. B is a constant speed motor.C needs dc excitation. D can not be run in reverse speed. Q.16 The most suitable servomotor for low power applications is A a dc series motor.B a dc shunt motor. C an ac two-phase induction motor.D an ac series motor.
Sparking at the commutator of a D.C. motor may result in. A Damage to commutator segments. B Damage to commutator insulation. C Increased power consumption. D All of the above. Correct Answer. Answer Option D. 4. Following motor is used where high starting torque and wide speed range control is required.
Oct 06, 2020 Explanation Why efficiency of D.C motor is below 50. The DC motor develops maximum power when the Back EMF is half the applied voltage is E b V 2. 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.
An unsaturated dc shunt motor drives a constant torque load at a speed at 1000 rpm taking an armature current of 20 A when 230 V is applied to the motor. If the applied voltage is reduced to 115 V, the motor
Oct 06, 2020 Nowadays DC motor is widely used in. Answer 1. Electric Traction. DC series motors are used in traction applications due to their excellent starting torque properties. Torque is directly proportional to the square of the armature current resulting in high starting torque. Ques 12.
TOP D.C. Motors Electrical Engineering Multiple Choice Questions and Answers. 1. No-load speed of which of the following motor will be highest a Shunt motor b Series motor c Cumulative compound motor d Differentiate compound motor Ans b
DC Machines can be tested by three different methods namely Direct Method, Indirect Method and Regenerative Method. Direct Method of testing of DC Machine is also known as Brake Test. Direct method is suitable for small DC machines. In Direct Method, the DC machine is subjected to rated load and the entire output power is wasted.
d All DC motors Answer d Clarification Dynamic braking is used in all DC motors though its implantation in series DC motor requires one more additional step of reversal of connections. Only care taken is, addition of braking resistance, armature resistance and series field resistance is lower than the critical resistance at that speed. 9.
MCQ quiz on DC Motors multiple choice questions and answers on DC Motors MCQ questions on DC Motors objectives questions with answer test pdf for interview preparations, freshers jobs and competitive exams. Professionals, Teachers, Students and Kids Trivia Quizzes to
Efficiency of a dc shunt machine can be computed by knowing. a output and input. b rating of machine and account of constant losses and armature resistance. c either a or b. Answer c either a or b. SHOW ANSWER. 5. The overall efficiency of a well designed dc machine may be expected to