DC Machines Questions and Answers
5. Compensating winding in a dc machine is placed on. (a) armature in slots. (b) yoke in the interpolar gap. (c) yoke in the pole faces. (d) partly in armature slots and partly in pole faces. 6. Compensating windings are employed in dc motors which are likely to operate. (a) at a constant speed over wide range of load.
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Correct Option: (a) Explanation: Sparking leads to damage of commutators at brushes and commutator sections. Thus, it is sensible to avoid sparking and increase the commutation speed. 10) DC series motors are used in buses, trains, and cranes because _____. a) DC series motor provides low starting torque.
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Study with Quizlet and memorize flashcards containing terms like If a speed of a DC shunt motor is increased, the back emf of the motor will a. Increase b. Remains the same c. …
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Electrical Machines MCQ Questions and answers. MCQ questions on DC Motor: Here, You can find Electrical Machines Objective questions and answers which will be useful for Competitive Exams and University Exams. No-load speed of which of the following motor will be highest ? (a) Shunt motor (b) Series motor (c) Cumulative …
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by Editorial Staff. Electrical Machines Objective Questions & Answers. Q.1 The two winding's of a transformer are. (A) conductively linked. (B) inductively linked. (C) not linked at all. (D) electrically linked. Q.2 A salient pole synchronous motor is running at no load. Its field current is switched off.
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23. Name the types of Alternator based on their rotor construction. 24. Which type of Synchronous generators are used in Hydro-electric plants and why? 25. What are the advantages of salient pole type construction used for Synchronous machines? 26. Why is the stator core of Alternator laminated?
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Study with Quizlet and memorize flashcards containing terms like If a speed of a DC shunt motor is increased, the back emf of the motor will a. Increase b. Remains the same c. Decrease d. Become zero, As the load is increased the speed of DC shunt motor will a. Reduce slightly b. Increase slightly c. Increase proportionately d. Remain unchanged, If …
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The Inter polls in DC machines have a tempering shape in order to. A. Reduce the overall weight. B. Reduce the saturation in the Interpole. C. Economics on the material required for Interpoles and their windings. D. Increase the acceleration of commutation. View Answer. B. Reduce the overall weight.
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Commutator Of Direct Current Machine Objective Questions and Answers. 46. The commutator of a DC machine serves the purpose of. 47. To avoid formation of grooves in the commutator. A. The brushes of opposite polarity should track each other. B. The brushes of same polarity should track each other.
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In D.C. machines the residual magnetism is of the order of A. 2 to 3 per cent (6) 10 to 15 per cent C. 20 to 25 per cent D. 50 to 75 per cent. Answer: A. ... Sir please send me short objectives questions with answer of ac and dc moter basic. Reply. Rislu says: April 16, 2024 at 12:00 am.
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DC Motors Objective Questions. The below list provides all the multiple-choice questions related to DC motor. Answers are available at the bottom of the article. 1. According to …
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This set of DC Machines Multiple Choice Questions & Answers (MCQs) focuses on "DC Motor Basics -1". 1. What will happen if DC shunt motor is connected across AC supply? a) Will run at normal speed. b) Will not …
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35. If two eight pole DC machines of identical armatures are wound, one with a lap winding and the other with wave winding, then . A. Wave wound machine will have more rated current and more voltage B. Lap wound machine will have more rated voltage and more current C. Lap wound machine will have more rated voltage and less current D. Wave …
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Answer / Hint Save Question. 2. In a dc motor energy conversion would not have been possible but for. A Input energy from the supply. B Production of back emf in the armature. C Use of commutator. D Rotation of the machine. Answer / Hint Save Question. 3.
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DC Machines Questions and Answers
This set of DC Machines MCQs focuses on "Operating Characteristics of DC Series Motor – 2". 1. Which DC motor is generally preferred for cranes and hoists? a) Series motor b) …
DC Machines Questions and Answers
c) Differential compound motor. d) Cumulative compound motor. View Answer. 3. Buses, trains, trolleys, hoists, cranes make use of DC series motor because __________. a) It provides low starting torque. b) Cost efficient. c) It provides high starting torque. d) It requires minimum power compare to other motors.
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D.C Machines · Electrical Machines · GATE EE
D.C Machines's Previous Year Questions with solutions of Electrical Machines from GATE EE subject wise and chapter wise with solutions. ExamSIDE (Powered by ExamGOAL) ... A 4-pole, separately excited, wave wound DC machine with negligible armature resistance is rated for 230 V and 5 kW at a speed of 1200 rpm. If the sam... View Question
