All Courses
Get the App Signup / Login
Sign in Open App
Electrical Engineering (EE) Exam  >  Electrical Engineering (EE) Tests  >  Test: Circuit Model of DC Machines - Electrical Engineering (EE) MCQ

Test: Circuit Model of DC Machines - Electrical Engineering (EE) MCQ


Test Description

10 Questions MCQ Test - Test: Circuit Model of DC Machines

Test: Circuit Model of DC Machines for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Test: Circuit Model of DC Machines questions and answers have been prepared according to the Electrical Engineering (EE) exam syllabus.The Test: Circuit Model of DC Machines MCQs are made for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Circuit Model of DC Machines below.
Solutions of Test: Circuit Model of DC Machines questions in English are available as part of our course for Electrical Engineering (EE) & Test: Circuit Model of DC Machines solutions in Hindi for Electrical Engineering (EE) course. Download more important topics, notes, lectures and mock test series for Electrical Engineering (EE) Exam by signing up for free. Attempt Test: Circuit Model of DC Machines | 10 questions in 10 minutes | Mock test for Electrical Engineering (EE) preparation | Free important questions MCQ to study for Electrical Engineering (EE) Exam | Download free PDF with solutions
Test: Circuit Model of DC Machines - Question 1
Save

If the terminal voltage of 220-V dc machine having armature resistance of 1 ohm. The induced emf produced is 200-V. The armature current for the above machine is

Detailed Solution for Test: Circuit Model of DC Machines - Question 1

I = (V-E)/r
= (220-200)/1
=20 A.

Test: Circuit Model of DC Machines - Question 2
Save

The shaft power at the DC Generator is

Detailed Solution for Test: Circuit Model of DC Machines - Question 2

 The shaft power is sum of mechanical power and rotational losses.

1 Crore+ students have signed up on EduRev. Have you? Download the App
Test: Circuit Model of DC Machines - Question 3
Save

If the electromagnetic torque in a DC shunt-generator is opposite, what can be further concluded?

Detailed Solution for Test: Circuit Model of DC Machines - Question 3

When the electromagnetic torque is in opposite direction, it is of motoring nature.

Test: Circuit Model of DC Machines - Question 4
Save

The conductor EMF and current are in _____ direction and developed torque is in _____ for generating mode.
Detailed Solution for Test: Circuit Model of DC Machines - Question 4

The conductor emf and current will be in same direction and the developed torque is in opposite direction for a generator.

Test: Circuit Model of DC Machines - Question 5
Save

If the armature terminal voltage is more that its induced EMF, the DC machine given is
Detailed Solution for Test: Circuit Model of DC Machines - Question 5

As the terminal voltage is lesser than armature voltage, the supply is fed to the machine and so it will be acting like a motor.

Test: Circuit Model of DC Machines - Question 6
Save

Consider a 200V, 25kW, 30A DC machine lap connected with armature resistance of 0.4 ohms. If the machine is later wave wound, then the developed power is
Detailed Solution for Test: Circuit Model of DC Machines - Question 6

The power of the machine remains unaltered by the type of connections.

Test: Circuit Model of DC Machines - Question 7
Save

If the DC machine is held constant at 3000 rpm. The DC voltage is 250V and speed is 2950. If the field is held constant with 250V. Is this machine generator or motor?
Detailed Solution for Test: Circuit Model of DC Machines - Question 7

 From the speed and emf relation, E = 250*2950/3000
= 245.8 V
This is less than the terminal voltage. Hence it is a motor.

Test: Circuit Model of DC Machines - Question 8
Save

 A shunt generator has an induced voltage on open circuit of 127 V. When the machine is on load the terminal voltage is 120 V. The load current if the field resistance be 15 ohm and armature resistance be 15 ohm.
Detailed Solution for Test: Circuit Model of DC Machines - Question 8

Ia*Ra = E-V
= 127 – 120
= 7 V
Ia = 350 A
Ish = 120/15
= 8 A
I = 350 – 8
= 342 A

Test: Circuit Model of DC Machines - Question 9
Save

The circuit depicting the equation V=Ea + I*Ra.
Detailed Solution for Test: Circuit Model of DC Machines - Question 9

 This is a motor performance equation.

Test: Circuit Model of DC Machines - Question 10
Save

The voltage drop at brush-commutator contact is variable (1-2V) and dependent of armature current.​
Detailed Solution for Test: Circuit Model of DC Machines - Question 10

The voltage drop at brush-commutator contact is variable (1-2V) and independent of armature current.

Information about Test: Circuit Model of DC Machines Page
In this test you can find the Exam questions for Test: Circuit Model of DC Machines solved & explained in the simplest way possible. Besides giving Questions and answers for Test: Circuit Model of DC Machines, EduRev gives you an ample number of Online tests for practice

Top Courses for Electrical Engineering (EE)

Download as PDF

Top Courses for Electrical Engineering (EE)

Important Questions for Circuit Model of DC Machines

Find all the important questions for Circuit Model of DC Machines at EduRev.Get fully prepared for Circuit Model of DC Machines with EduRev's comprehensive question bank and test resources. Our platform offers a diverse range of question papers covering various topics within the Circuit Model of DC Machines syllabus. Whether you need to review specific subjects or assess your overall readiness, EduRev has you covered. The questions are designed to challenge you and help you gain confidence in tackling the actual exam. Maximize your chances of success by utilizing EduRev's extensive collection of Circuit Model of DC Machines resources.

Circuit Model of DC Machines MCQs with Answers

Prepare for the Circuit Model of DC Machines within the Electrical Engineering (EE) exam with comprehensive MCQs and answers at EduRev. Our platform offers a wide range of practice papers, question papers, and mock tests to familiarize you with the exam pattern and syllabus. Access the best books, study materials, and notes curated by toppers to enhance your preparation. Stay updated with the exam date and receive expert preparation tips and paper analysis. Visit EduRev's official website today and access a wealth of videos and coaching resources to excel in your exam.

Online Tests for Circuit Model of DC Machines

Practice with a wide array of question papers that follow the exam pattern and syllabus. Our platform offers a user-friendly interface, allowing you to track your progress and identify areas for improvement. Access detailed solutions and explanations for each test to enhance your understanding of concepts. With EduRev's Online Tests, you can build confidence, boost your performance, and ace Circuit Model of DC Machines with ease. Join thousands of successful students who have benefited from our trusted online resources.
© EduRev
Education Revolution
Follow Us
Signup to see your scores go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup