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Electrical Engineering : Dc Motors QUESTIONS AND ANSWERS :: part1 : 1 to 5. Following Electrical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2021 and IES 2021 examinations :
Electrical Engineering OBJECTIVE QUESTIONS ON DC GENERATOR dc machine jb gupta important mcq Questions part 1 Dc Machine Objective Questions Answers Answer 4. Less than 50% .
MOTOR IMPORTANT MCQ DC Generator objective type question and answer in Electrical Engineering OBJECTIVE QUESTIONS ON DC GENERATOR dc machine jb gupta important mcq Questions part 1 Dc Machine Objective Questions Answers Answer 4. Less than 50% . Explanation: Why efficiency of D.C motor is below 50%. The DC motor develops maximum power
Oct 06, 2020· Answer 4. Starter for car. Explanation: In DC series motor Torque (Ta) increases as the Square of armature current (Ia) T a ∝ I a 2. So DC motor provides high starting torque which is required to start a car. Ques 9. In the DC machine, the fractional pitch winding is used.
Questions on Electric Motors with answers-. Q1. WHAT IS ELECTRIC MOTORS? ANS. An electric motor is an electrochemical device that converts electrical energy into mechanical energy. Most electric motors operate through the interaction of magnetic field and current carrying conductors to …
Question 2: Download PDF ›› A 220V dc machine supplies 20A at 200 V as a generator. The armature resistance is 0.2 . If the machine is now operated as a motor as a same terminal voltage and current but with flux increased by 10%, the ratio of motor speed to generator speed is. Options:
Jul 20, 2021· Acces PDF Dc Machine Objective Questions Answers GENERATOR dc machine jb gupta important mcq Questions part 1 Dc Machine Objective Questions Answers Answer 4. Less than 50% . 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
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DC Circuits Multiple Choice Questions. Question 1. Determine the voltage dropped across resistor R3 in this circuit: (A) 7.5 volts (B) 3.0 volts (C) 6.6 volts (D) 15 volts (E) 5.4 volts. Answer : B. Question 2. Calculate total current in this circuit:
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The outer frame of a dc machine is called a yoke. It is made up of cast iron or steel. In small DC machines, it is made up of cast iron and in the case of large DC machines, it is made up of cast steel. It not only provides mechanical strength to the whole assembly but also carries the magnetic flux produced by the field winding. Type of ...
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Hopkinson's test on D.C. machines is conducted at (a) no-load (b) part load (c) full-load (d) overload Ans: c. ... 130 TOP MOST D.C.MOTORS Objective Type Questions and Answers pdf free Download ; ... 130 TOP DC MOTOR Objective Questions Answers pdf free Download ; 250+ TOP MCQs on Braking of DC Motors – 2 and Answers ...
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Question Bank for Tech-III/TL Page 1 of 42 I. Multiple Choice Questions: - 1) The fuse provided in 4.5 KW RR U box for one of 3 phase AC supply is [ b ] a) 6 A HRC b) 35 A HRC c) 16 HRC d) 40 A HRC 2) The field fuse provided in RRU [ a ]box is a) 6 A HRC b) 35 A HRC c) 16 HRC d) 40 A HRC
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Jun 23, 2017· ANSWER:A 14. Motor is a machine which converts A) Mechanical Energy into Electrical Energy B) Electrical Energy into Mechanical Energy C) Both A&B D) None of these ANSWER:B 15. Generator is a machine which converts ... ELECTRICAL ENGINEERING OBJECTIVE TYPE QUESTIONS AND ANSWERS PDF FOR COAL INDIA LIMITED (CIL) MT .
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Jun 06, 2018· Ans 1. Same as number of poles. Explanation: In a lap winding, the number of parallel paths, a, is always equal to the number of poles, p, and also to the number of brushes. The number of parallel paths in a DC machine depends on the type of armature winding used.
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Question 27. What Is Dc Motors? Answer : A DC motor is a mechanically commutated electric motor powered from direct current (DC). The stator is stationary in space by definition and therefore so is its current. The current in the rotor is switched by the commutator to also be stationary in space.
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