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 …
Oct 17, 2009· Engg Multiple Choice Questions Saturday, October 17, 2009. DC MACHINES DC MACHINES. Q.The speed of a d. c series motor at no load is a) Zero b) Infinity c) Q00 r. p. m ... case of DC GENERATOR but in case of DC MOTOR as the DC supply is to be converted in AC the function of commutator in DC MACHINE in case of dc motor is to convert DC TO AC ...
12. In a d.c. machine, Interpoles are used to ..... A. Neutralise the effect of armature reaction in the Interpol region B. Generate more induced EMF in the armature C. Avoid interference of the armature flux with the main field flux D. Reduce the demagnetising effect of armature reaction
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Download Free Dc Machine Objective Questions Answers motor and V is the terminal voltage, then the condition for maximum power is DC Machines - Electrical Engineering (MCQ) questions and ... This set of DC Machines Multiple Choice Questions & Answers (MCQs) focuses on "DC Motor Basics -1". 1. What will Page 7/28
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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 . B. Reduce the eddy-current loss. C. Reduce armature copper loss. D. Increase dissipation of heat from the armature surface.
DC Machines - Electrical Engineering (MCQ) questions and answers. 1) A 120 V shunt generator running at 850 rpm has its armature and shunt field resistance of 0.15 ohm and 50 ohm respectively. It supplies 200 lamps each rated at 60 W, 100 V. The friction and windage and core loss of the machine is 400 W. its armature copper loss on full load ...
15 questions. Show answers. Question 1. SURVEY. Ungraded. 30 seconds. Report an issue. Q. Choose the correct present tense verb that fills in the blank: Every ball, bat, glove __________ an extra 25 cents at Frank's.
Multiple Choice Question (MCQ) of D.C. Machines page-9. 81. If the back emf of a dc motor suddenly vanishes. a) The motor will run faster. b) The motor will start hunting the efficiency of the motor will increase. c) The motor will start hunting. d) The motor will burn out. Ans: (d)
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
Multiple choice questions. Chapter 1: Basic Electrical Circuits and Components. Chapter 2: Measurement of Voltages and Currents. Chapter 3: Resistance and DC Circuits. Chapter 4: Capacitance and Electric Fields. Chapter 5: Inductance and Magnetic Fields. Chapter 6: Alternating Voltages and Currents. Chapter 7: Power in AC Circuits.
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 when the Back EMF is half the applied voltage is E b = V / 2. Practically it ...
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250+ TOP MCQs on Applications of DC Machines and Answers. DC Machines Multiple Choice Questions on "Applications of DC Machines". 1. Why are the DC motors preferred for traction applications? a) Torque and speed are inversely proportional to armature current. b) Torque is proportional to armature current.
6. In D.C. machines fractional pitch winding is used. 7. A three point starter is considered suitable for. 8. In case-the conditions for maximum power for a D.C. motor are established, the efficiency of the motor will be. 9. The power mentioned on the name plate of an electric motor indicates. 10.
D.C. Generators MCQ Questions & Answers | Electrical Engineering. 1. 2. A cumulatively compounded long shunt generator when operating as a motor would be. 3. If brushes of a D.C. generator are moved in order to bring these brushes in magnetic neutral axis, there will be. 4. Two D.C. shunt generators, each with armature resistance of 0.02 ohm ...
Show Explanatory Answer. Answer 2 False. Explanation: There is no concept of power factor improvement in DC Circuits because the phase angle (θ) between Current (I) and voltage (V) is 0 and the then power factor becomes Cos θ = 1. So power factor in DC Circuits is 1 and Only 1. In other words there is no reactive component in DC Circuits so ...
DC Motor or Direct Current Motor Multiple Choice Questions and Answers. 21. In a DC motor, unidirectional torque is produced with the help of ..... A. Brushes B. Commutator C. End-plates D.
Question 8 of 15. 8. Question. 1 points. The direction of rotation of dc series motor can be reversed by interchanging ___ terminals: 1. Either Armature or Field. 2. Field.
Jun 23, 2017· ELECTRICAL MACHINE 25 IMPORTANT MCQ PDF FOR UPCOMING EXAM 2017. Harikesh Yadav June 23, 2017 EE MCQ PDF, General. 1. EMF Method is used for calculation of. A)Voltage. Regulation B)Efficiency C)Losses D) None of these. ANSWER:A. 2. Slip of.
Dc Motor Mcq Questions DC Motor or Direct Current Motor Multiple Choice Questions April 10th, 2019 - 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 B Reduce the eddy current loss C Reduce armature copper loss D Increase
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If they are connected in series and 600V be Electrical Engineering Basics applied across them, the readings are Objective Questions with Answers: (a) 360V and 240V Part-17 (b) 300V each (c) 400V and 200V DC Machine Multiple Choice Questions with Solutions: Part-12 (d) one of the meters out of the range and other 100V 3 Phase Induction Motors ...
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Question Bank- EE 401 Type 1- Multiple Choice Questions Page 2 of 13 MODULE II : DC Machines 1. A 6-pole DC machine has 300 conductors and flux per pole is 15 mWb. If the machine is driven at 1800 rpm, then the average emf induced per conductor will be a. 3.6V b. 7.2V c. 9V d. 162V 2. A commutator with a diameter of 50cm rotates at 1000 rpm.