Home

# Squirrel cage induction motor is having MCQ

1. A double squirrel-cage induction motor has two rotors moving in opposite direction two parallel windings in the stator two parallel windings in the rotor two series windings in the stator 2. The starting torque of a squirrel-cage induction motor is low negligible same as the full-load torque slightly more than full-load torque 3. The <a title=Three Phase Induction Motor MCQs class. 117.If a squirrel-cage induction motor having a rated slip of 2% on full-load has a starting torque of 0.5 full-load torque, then starting current is. a) equal to full-load current; b) twice full-load current; c)four times full-load current. d) five times full-load current; Answer: five times full-load current 118 6. The squirrel cage rotor of a 6 pole induction motor can be used for.. induction motor. (A) only 6 pole (B) 6 or 12 pole (C) any number of poles in an (D) none of the above . Ans: (C) any number of poles in an . 7. The squirrel cage motors are provided with blades in order to (A) facilitate cooling of the rotor (B) balance the rotor. Multiple Choice Question (MCQ) of Induction Motors page-4. 31. Advantage of slip ring induction motor over squirrel cage induction motor is The induction motor speed decreases by a few percent when the motor goes from no load to full-load operation. The full-load speed is a function of the motor design and power and is usually in the range of 94-99% of the synchronous speed; the difference is the slip. Figure 2 shows the typical construction of a squirrel-cage induction.

What is Squirrel Cage Induction Motor. A 3 phase squirrel cage induction motor is a type of three phase induction motor which functions based on the principle of electromagnetism.It is called a 'squirrel cage' motor because the rotor inside of it - known as a 'squirrel cage rotor' - looks like a squirrel cage MCQ in AC Motors part 3 of the Series as one of the Electrical Engineering topic in REE Board Exam. A pinoybix mcq, quiz and reviewers. Menu. New! Math; One of the speeds of a 2-speed squirrel cage induction motor is 800 rpm (lower speed). The other speed would be. A. 400 rpm. B. 2400 rpm. C. 1600 rpm. D. 1200 rpm. View Answer: Answer.

100 Most Important MCQ on Electric Drive | Industrial Drive MCQ-2020 February 27, 2021 Ques 41. A pole changing type squirrel cage motor used in derricks has four, eight and twenty-four poles 27.Which of the following statement about a double squirrel cage induction motor is incorrect ? (a) It has better speed regulation than squirrel cage motor. (b) Its upper cage is of low resistance and lower cage of high resistance. (c) It is particularly useful where frequent starting under heavy loads is required

### Three Phase Induction Motor MCQs Electricalvoic

• 10.Three Phase Squirrel cage Induction motor rotor is having A) Three phase winding B) Single Phase winding C) Two Phase winding D)Short Circuited Copper Bars ANSWER:D 11. Induction motor Stator Voltage control method is used for A) Speed control B) Frequency Control C) Both A&B D) None of these ANSWER:A 12.Three phase Induction motor stator is o
• Hope you know everything fundamental related squirrel cage induction motor. We saw the construction of the Squirrel cage induction motor. The main difference between slip ring and squirrel cage induction motor is the rotor construction. Motors have main two parts in construction: stator and rotor. In these motor, the rotor is squirrel cage type
• 17. Reduced voltage starter can be used with (a) slip-ring motor only but not with squirrel cage induction motor (b) squirrel cage induction motor only but not with slip-ring motor
• ‣ Multiple Choice Question (MCQ) of Induction Motors page-7 28. On open circuiting the rotor of a squirrel cage induction motor, the rotor. a) Makes noise b) Does not run c) Does not run d) Runs at dangerously high speed Ans: (c) 29. Number of different speed that can be obtained from two induction motors in cascade i
• Answer 3. Power Factor. Explanation: Semi-closed slot in an Induction motor Advantages. Semi-closed slots has narrow slot, therefore, flux distribution is uniform hence harmonics are less so smooth operation is possible.; In the Semi-closed slot average length of the air gap is less compared to open type hence magnetic circuit reluctance is less, less magnetizing current means better power.
• 15. Rotor rheostat control method of speed control is used for (a) squirrel-cage induction motors only. (b) slip ring induction motors only. (c) both squirrel-cage and slip ring induction motor. (d) none of the above
• 183. The magnetizing current a three-phase induction motor is much higher than the equivalent transformer because. A. the size of an induction motor is higher than an equivalent transformer. B. of the presence of air-gap between stator and rotor in an induction motor. C. grain oriented magnetic material is used for the core of an induction motor

Fig.1 Squirrel Cage rotor. In Squirrel cage induction motors the rotor is simplest and most rugged in construction. Cylindrical laminated core rotor with heavy bars of copper or Aluminum is used for conductors The advantages of a slip-ring induction motor over a squirrel cage induction motor is that. A. It has higher efficiency. B. It has higher power factor. C. It can be started with the help of rotor resistance starter. D. None of the above. Answer/ Hin Main disadvantage of squirrel cage induction motor is that they have poor starting torque and high starting currents. Starting torque will be in the order of 1.5 to 2 times the full load torque and starting current is as high as 5 to 9 times the full load current

Ques.[2] Squirrel-cage induction motor is finding increasing application in high-power servo systems because new methods have been found to (a) increase its rotor resistance (b) control its torque (c) decrease its intertia (d) decouple its torque and flux. Answer: c) Squirrel-cage induction-motor. d) Single-phase motor . Q2. The speed of rotor of an induction-motor is: a) The same as the synchronous speed. b) Higher than the synchronous speed. c) Lesser than the synchronous speed. d) Determined by the frequency and the number of poles . Q3. Squirrel-cage induction-motor differs from a slip-ring induction.

### 100+ Electrical MCQ Questions in Induction Motor

1. « Back CONTENTS Next » 1. The main function of using starter in induction motor is to (a) avoid starting torque. (b) reduce starting torque. (c) avoid starting current. (d) reduce starting current. 2. The slip of a squirrel cage induction motor is small due to (a) high resistance of rotor winding. (b) low resistance of [
2. als Answer: over-excited 127.The blocked rotor test of squirrel-cage induction motor deter
3. Q10. Calculate slip of an induction motor if it has 4 poles, 50hz, rotor speed is 1400 rpm. a) 6.6%. b) 6.0%. c) 5.5%. d) 5.0% . Q11. Which one of the following 3-phase motors is not self-starting? a) Synchronous motor. b) Squirrel cage induction motor. c) Wound rotor motor. d) Double cage motor . Q12
4. Squirrel Cage Induction Motor Working Principle Squirrel induction motor working is based on the principle of electromagnetism. When the stator winding is supplied with a three-phase AC, it produces a rotating magnetic field (RMF) which has a speed called synchronous speed. This RMF causes voltage induced in the rotor bars
5. Squirrel Cage & Slip Ring Rotor in 3 phase induction motor - MCQs with Answers Q1. In squirrel cage rotor, bars are usually brazed to the end rings. The end rings are used to a. Prevent rotor leakage current For the speed control of squirrel cage induction motor, the most suitable method is a. Rotor resistance control b. Rotor reactance.
6. Speed Control in Three Phase Induction Motor - MCQs with Answers Q1. The method which can be used for the speed control of induction motor from stator side is a. V / f control It cannot be used for squirrel cage induction motors c. It can be used for large induction motors d. None of these View Answer / Hide Answer

In the squirrel-cage induction motor the rotor slots are usually given slight skew. A. To reduce the magnetic hum and locking tendency of the rotor. B. To increase the tensile strength of the rotor bars. C. To ensure easy fabrication. D. None of the above. Answer/ Hin Multiple choice questions on Induction motor with brief explanatory answers. The number of rotor bars in squirrel cage induction motor is generally a prime number. When of following is the correct statement about rotor reactance of induction motor running at full load 3-phase-induction-motor-mcq, 3 Phase Induction Motor Objective type question answer. 3-phase-induction-motor-mcq, 3 Phase Induction Motor Objective type question answer. Home; About; 10 Most of the squirrel cage motor has a slip percentage. (A) 2 to 5% (B) 1 to 5% (C) 2 to 7% (D) 2 to 8% Answer- (A) 11 is the formula to find the rotor.

### Induction Motors Most Asked MCQS Part-01 - Electrical MCQ

• Squirrel Cage Induction Motor squirrel cage induction motors play an important part in the field of electromechanical energy conversion and are widely used in many industrial processes, and they are also the most investigated machine with regard to motor fault diagnostics. From: Mechanical Systems and Signal Processing, 201
• The speed of a squirrel-cage induction motor can be controlled by all of the following except (a) changing supply frequency (b) changing number of poles (c) changing winding resistance Multiple Choice Questions (MCQ) on Synchronous Motors for Electrical Engineering 1. Synchronous motors are generally not self-starti..
• 13. The number of slip rings on a squirrel cage induction motor is usually (a) two (b) three (c) four (d) none Ans: d. 14. The starting torque of a squirrel-cage induction motor is (a) low (b) negligible (c) same as full-load torque (d) slightly more than full-load torque Ans: a. 15. A double squirrel-cage induction motor ha
• Explanation : A synchronous motor may have a squirrel-cage winding embedded in its rotor, used to increase the motor starting torque and so decrease the time to accelerate to synchronous speed. The squirrel cage winding of a synchronous machine will generally be smaller than for an induction machine of similar rating
• A squirrel cage motor is an induction electric motor in which a rotor carries conductors arranged in the form of a cage built up of two conductor end rings joined by conductor bars which are often..
• The power factor of a squirrel cage induction motor is. 46) The power factor of a squirrel cage induction motor is. A) low at light loads only B) low at heavy loads only C) low at light and heavy loads both D) low at rated load only. Answer is: (Set-1) with Answers MCQ

### Multiple Choice Question (MCQ) of Induction Motors page-4

In a squirrel cage motor the induced e.m.f. is a) Dependent on the shaft loading b) Dependent on the number of slots c) Slip times the stand still e.m.f. induced in the rotor d) None of the abov 7. When smooth and precise speed control over a wide range is desired, the motor preferred is. A. Synchronous motor B. Squirrel cage induction motor C. Wound rotor induction motor D. Dc motor E. None of the abov In the squirrel-cage induction motor, the number of slip rings is usually? (a) two (b) three (c) four (d) none; Ans: d. 14. In a squirrel-cage induction motor, the starting torque is usually? (a) low (b) negligible (c) same as full-load torque (d) slightly more than full-load torque; Ans: a. 15. The double squirrel-cage induction motor has two Induction Motor MCQ #12 Learn Polyphase Induction Motors MCQ questions & answers are available for a Electrical students to clear exams. Electrical Article. 133) In squirrel cage induction motors, the rotor slots are usually given slight skew to reduce . windage losses. eddy currents. accumulation of dirt and dust 3-phase induction motor MCQ questions with an answer - In squirrel cage induction motors, rotor slots are usually given slight skew t

### Squirrel Cage Induction Motor - an overview

1. The number of slip rings on a squirrel cage induction motor is usually (a) two (b) three (c) four (d) none Ans: d 14. The starting torque of a squirrel-cage induction motor is (a) low (b) negligible (c) same as full-load torque (d) slightly more than full-load torque Ans: a 15. A double squirrel-cage induction motor ha
2. (b) D.C. shunt motor (c) Squirrel cage induction motor (d) Wound rotor induction motor Answer: b. 28. Belted slip ring induction motor is almost invariably used for (a) water pumps (b) jaw crushers (c) centrifugal blowers (d) none of the above Answer: b. 29
3. MCQs on 3 Phase Induction Motor. Practice Online (MCQs) on three phase induction motor for electrical engineering job test or interview conceptual question
4. Squirrel cage induction motor has advantages like cheaper in cost, robust construction, efficient and reliable motor. Other hands, slip ring induction motor has disadvantages like frequent maintenance and having a high copper loss. The major difference is the external resistance circuit for controlling the speed of the motor. In the case of.
5. 42. Which off the following motors is preferred when a smooth and resize speed control over a wide range is desired? A. DC motor B. Squirrel cage induction motor C. Wound rotor induction motor D. Synchronous motor
6. a. Squirrel cage induction motor and synchronous motor. b. Slip-ring induction motor and synchronous motor. c. Slip-ring induction motor and squirrel cage induction motor. d. All of the above . 25. For the same rating, the size of the single-phase induction motor is about_____ that of the corresponding three-phase induction motor. a. one-third.
7. Squirrel cage AC induction motor opened to show the stator and rotor construction, the shaft with bearings, and the cooling fan. Three phase high voltage asynchronous motors. Induction Motor 1245 the primary. That is why such motors are known as induction motors. In fact, an induction motor ca

### Squirrel Cage Induction Motor: Working Principle

• At no-load the rotor core loss of a 3 phase induction motor is: Very large; Large; Small; Practically Zero; Correct answer: 4. Practically zero. In double squirrel cage induction motor, the resistance of outer cage winding is. In double squirrel cage induction motor, the resistance of outer cage winding is: Low; High; Correct answer: 2. Hig
• Regarding skewing of motor bars in a squirrel cage induction motor (SCIM), which statement is false . 38) Regarding skewing of motor bars in a squirrel cage induction motor (SCIM), which statement is false ? A) it prevents cogging B) it increases starting torque (Set-1) with Answers MCQ
• 7) If an induction motor is initially connected in delta and then reconnected in star then the current drawn will become a. Thrice of the current drawn when connected in delt
• b. Wound rotor induction motors. c. Plain squirrel cage induction motors. d. DC series motor . 17. The most suitable motor for a steel mill requiring a motor having high starting torque, wide spread range and precise speed control is_____. a. DC shunt motor. b. DC series motor. c. Wound rotor induction motor. d. Plain squirrel cage induction.
• The tendency of squirrel cage Induction motor to run at 1/7 times of its synchronous speed is called crawling. Q: What is Cogging? Sometimes at low voltage the squirrel cage motor fails to start. This is due to magnetic locking between stator and rotor as the number of stator slot is equal to number of rotor slot. This phenomena is cogging
• (a) slip ring induction motor (6) squirrel cage induction motor (c) both (a) and (b) (d) none of the above Ans: b. 94. A squirrel cage induction motor is not selected when (a) initial cost is the main consideration (b) maintenance cost is to be kept low (c) higher starting torque is the main consideration (d) all above considerations are.

### MCQ in AC Motors Part 3 REE Board Exam • Pinoybix

• squirrel cage induction motors are loaded up to 20 to 35% during running condition. An attempt was made to start the squirrel cage motor in Delta during starting and running in star for High starting torque applications. There is a reasonable reduction in power.
• The rotor construction is squirrel cage type the copper bars are permanently shorted at both with help of end rings. When single phase AC supply is connected to the motor the magnetic flux generated which rotates around the axis only. It never rotates like the three phase motor. Hence single phase motor is not self-starting
• This method cannot be used for squirrel cage induction motor. Cascade Control Method. In this method of speed control of three phase induction motor, the two three-phase induction motors are connected on a common shaft and hence called cascaded motor. One motor is the called the main motor, and another motor is called the auxiliary motor
• Apr 11,2021 - Test: Induction Machine - 2 | 25 Questions MCQ Test has questions of Electrical Engineering (EE) preparation. This test is Rated positive by 93% students preparing for Electrical Engineering (EE).This MCQ test is related to Electrical Engineering (EE) syllabus, prepared by Electrical Engineering (EE) teachers
• ations, with alu
• Low cost, rugged construction and less maintenance are the advantages of squirrel cage induction motors What is the speed variation of the induction motor from no load to full load? The decrement in the speed of the small rating Induction Motor from no load to full load will be around 4 to 5 percent and 2 to 2.5 percent in the case of large.

### 100 Most Important MCQ on Electric Drive Industrial

• Polyphase Induction Motors MCQ Test & Online Quiz: Below is the Polyphase Induction Motors MCQ test that checks your basic knowledge of Polyphase Induction Motors. This Polyphase Induction Motors 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 Polyphase Induction Motors Quiz Button
• Q14: What is a fractional H.P. motor? Ans: A small motor having H.P. less than unit is called fractional H.P. motor. Q15: Which type of rotor is used in single phase motors? Ans: Squirrel cage type. Q16: How the starting winding produce rotation in a single phase resistance start induction motor
• Single Phase Induction Motor Multiple Choice Questions and Answers. 11. A permanent-split single-phase capacitor motor does not have A. Centrifugal switch B. Starting winding C. Squirrel-cage rotor D. High power facto

### Polyphase Induction Motor MCQ - your electrical guid

1. Induction motor is one of the most popular motors in the electrical industry. Due to its rugged and reliable operations, it is widely employed for various processes and industries. Unlike the synchronous motor, it doesn't need a separate dc field for excitation purposes. Given below are the top 10 Induction Motor MCQs with answers and [
2. 1. Regarding skewing of motor bars in a squirrel cage induction motor, (SCIM) which statement is false ? (a) it prevents cogging (b) it increases starting torque (c) it produces more uniform torque (d) it reduces motor 'hum' during its operation. 2. The principle of operation of a 3-phase
3. An induction motor or asynchronous motor is an AC electric motor in which the electric current in the rotor needed to produce torque is obtained by electromagnetic induction from the magnetic field of the stator winding. An induction motor can therefore be made without electrical connections to the rotor. An induction motor's rotor can be either wound type or squirrel-cage type

Electrical Drives MCQ Test & Online Quiz: Below is the Electrical Drives MCQ Test that checks your basic knowledge of the Electrical Drives. This Electrical Drives MCQ Test contains 20 Multiple Choice Questions. You have to select the right answer to the question. Finally, You can also attempt Online Quiz from the Take Electrical Drives Quiz Button A squirrel-cage rotor (10) includes a laminated core (14) fixed to a rotor shaft (12), a plurality of secondary conductors (18) arranged respectively in a plurality of through holes (16) formed through the laminated core (14), a pair of end rings (20) connected to the secondary conductors (18) at axial ends of the laminated core (14), and a pair of reinforcing members (22, 23) respectively. (a) slip ring induction motor (6) squirrel cage induction motor (c) both (a) and (b) (d) none of the above. Ans: b . 94. A squirrel cage induction motor is not selected when (a) initial cost is the main consideration (b) maintenance cost is to be kept low (c) higher starting torque is the main consideration (d) all above considerations are. Please have a look at the below figures of Squirrel Cage Induction and Wound Rotor / Slip Ring Induction Motor. The figure itself depicts many difference between the two types of motors. Don't worry, difference between Squirrel Cage and Slip Ring type Induction Motor is tabulated after the figure Three can be three ways to control the speed of squirrel cage induction motor. Voltage changes; Frequency changes; Stator poles; Voltage changes; First method is by means of changing the input voltage applied for excitation of stator winding. Although it looks simple to change the value of voltage, however very large change in voltage is.

Induction motors will not run at super synchronous speed by it's own. It requires an external force to pull it's speed above synchronous speed. Example: an electric vehicle driven by induction motor will run at super synchronous speed when it move.. The stator of an induction motor contains 3 'single phase windings'. When three currents pass through these windings at an angle of 120 degrees a rotating magnetic field is generated. This rotation of field is known as the synchronous speed. While using the term, 'speed of the motor' we mean this synchronous speed Induction Motor MCQs with Answers - Set 02 MCQ Polyphase Ind Motors Edit Practice Test: Question Set - 02 Squirrel cage induction motor only but not with slip ring motor (C) Squirrel cage as well as slip ring induction motor (D) None of the above. Correct Answer. 2. Insertion of resistance in the stator of an induction motor

6. The motor which has high starting torque: Squirrel cage induction motor; Slip ring induction motor; Correct answer: b. Slip ring induction motor. 7. The synchronous speed of a 4 pole machine operated at 50 Hz is: 200 r/min; 1500 r/min; 10,000 r/min; 50 r/min; Correct answer: b. 1500 r/min. 8. Commonly, the power factor of a single phase. In squirrel cage induction motors, the rotor slots are usually given slight skew in order to (A) Reduce windage losses (B) Reduce eddy currents Multiple Choice Questions with Answers on Refrigeration and Air-Conditioning - Set 07. Practice Test: Question Set - 07 1 Important Industrial Drive Multiple Choice Questions and Answers. 6. The range of ratings of electric motor used for rolling mills is of the order of A. 10 to 25 kW B. 25 to 85 kW C. 85 to 400 kW D. 400 to A. Squirrel cage induction motor and synchronous motor

The starting torque of a squirrel-cage induction motor is the turning effort or torque which the motor exerts when full voltage is applied to its terminals at the instant of starting. The amount of starting torque which a given motor develops depends, within certain limits, on the resistance of the rotor winding Squirrel Cage Induction Motor. Slip Ring Induction Motor. Tags: Question 6 . SURVEY . 60 seconds . Q. Q. Single phase induction motors are having only squirrel cage rotors . answer choices . yes. no. Tags: Question 14 . SURVEY . 30 seconds . Q. the speed of the magnetic field of stator is called as A three-stack VR stepper motor has a step angle of 10º. What is the number of rotor teeth in each stack ? (a) 36 (b) 24 (c) 18 (d) 12 4. If a hybrid stepper motor has a rotor pitch of 36º and a step angle of 9º, the number of its phases must be (a) 4 (b) 2 (c) 3 (d) 6 5 A. squirrel-cage induction motors only B. slip ring induction motors only C. both A. and (b) D. none of the above. PakMcqs.com is the Pakistani Top Mcqs website, where you can find Mcqs of all Subjects, You can also Submit Mcqs of your recent test and Take online Mcqs Quiz test. INFO. Home; About Us

MCQ (Single Correct Answer) GATE EE 2002 If a 400 V, 50 Hz, star connected, 3 phase squirrel cage induction motor is operated from a 400 V, 75 Hz supply, the torque that the motor can now provide while drawing rated current from the supply Introduction. We have seen the classification of A.C. motors and discussed in detail the working principle, concept behind rotor rotation and many other aspects of induction motor. Now let us discuss in detail, the most common form of induction motor, the Squirrel cage induction motor. The reason for the name Squirrel cage is because of the type of rotor used in these motors The motor whose rotor is wound type such type of motor is called slip ring induction motor, whereas the squirrel cage motor, has a squirrel cage type rotor. The rotor of the slip ring motor has a cylindrical core with parallel slots, and each slot consists each bar. The slot of the squirrel cage motor is not parallel to each other Let us understand the various starting methods of squirrel cage induction motors like primary resistors, auto transformers & star-delta methods. Also lets get to know the methods which are used to control the speed of squirrel cage. Know how the speed control is easily achieved by changing the number of stator poles Question is ⇒ A squirrel cage induction motor having a rated slip of 4% of fullload has a starting torque same as the full-load torque. Which one of the following statements is correct? The starting current is, Options are ⇒ (A) equal to the full-load current., (B) twice the full-load current., (C) four times the full-load current, (D) five times the full-load current, (E) , Leave your.

motor performance. External resistance connected to slip-ring and 1. Increases the starting torque 2. Decreases the starting current 3. Used to control the speed of rotor. 26 State the main constructional differences between cage induction motor and slip-ring induction motor. Squirrel Cage Induction Motor Slip-ring Induction Motor Question 4 : Irrespective of the supply frequency,the torque developed by a squirrel cage induction motor is the same whenever_____is the same. Option-1 : supply voltage : Option-2 : external load: Option-3 : rotor resistance: Option-4 : slip spee In a squirrel cage induction motor, the rotor slots are—— As some of our MCQs pages are not working well, but we are working on it and it will be live (soon) Thanks for pointing the msg. Reply. Ahmed says: at . Hello if we have three phase ( 220 ) induction motor ( star connection ) and power supply changed to 380 3 phas A. slip ring motor only but not with squirrel cage induction motor B. squirrel cage induction motor only but not with slip ring motor C. squirrel cage as well as slip ring induction motor D. none of the abov D.C. series motors induction motors ⇒ In a induction motor if P is the power delivered to a rotor and s is the slip, then the power lost in the rotor as copper loss will be P/s sP s 2 P P/s 2 ⇒ In a squirrel cage motor the induced e.m.f. is dependent on the shaft loading dependent on the number of slots slip times the stand still e.m.f.

### Electrical Machine 25 Important Mcq Pdf for Upcoming Exam

Squirrel cage induction motor: Type of alternating current induction motor in which the rotor winding has little resistance and thus carries very high current. To withstand high currents, the rotor structure is modified and more resembles a cage than a winding 5) In induction motor, greater the number of poles A) Lesser the frequency B) Greater the speed C) Lesser the speed D) All of these 6) A 4-pole three-phase induction motor has a synchronous speed of 25 rev/s. The frequency of the supply to the stator is: A) 500 Hz B) 100 Hz C) 25 Hz D) 50 Hz 7) The slip speed of an induction motor depends upon Squirrel cage motor and slip ring (wound rotor) motor and are the two types of induction motor. Slip ring induction motor is also known as wound rotor induction motor. Both these types of induction motor operates on the principle of faraday law of electromagnetic induction

Learn Polyphase Induction Motors MCQ questions & answers are available for a Electrical Engineering students to clear GATE exams, various technical interview, competitive examination, and another entrance exam. Polyphase Induction Motors MCQ question is the important chapter for a Electrical Engineering and GATE students. Page-10 section- MCQ ON ELECTRICAL ENGINEERING Q.1 A salient pole synchronous motor is running at no load. Q.3 The power factor of a squirrel cage induction motor is (A) low at light load only. (B) low at heavy load only. two-phase induction motor (C) A.C. operated universal motor (D) hybrid stepper motor. Ans: Electrical Machines MCQ Quiz Multiple Choice Questions and Answers. Electrical Machines Objective Question and Answer to prepare for competitive and entrance exams and test your skills on the topic. Professionals, Teachers, Students and Kids Trivia Quizzes to test your knowledge on the subject Well the shortest and the simpest answer would be the stator and the rotor. But there is more to it. Let's start with the parts that are visible to us when we look at an induction motor. 1. A metal housing, with ribs designed for natural cooling (..

If the rotor of a cage induction motor moves at a rotational speed of N s (1-s), where N s is the synchronous speed and s is the slip, then the frequency of the magnetic flux components in the air gap observed from the stator are the following:. 1. The stator magnetomotive force (m.m.f.) waves due to the applied stator winding currents at the line frequency f A squirrel cage rotor from an induction motor. This example is from a small air fan. Most modern induction motors have a rotor in the form of a squirrel cage. The cylindrical squirrel cage consists of heavy copper, aluminum, or brass bars set into grooves and connected at both ends by conductive rings that electrically short the bars together The first three starters are used for both squirrel cage and slip ring induction motor. It is therefore recommended that large three-phase squirrel-cage induction motors be started with a reduced voltage applied across the stator terminals at starting. Small motors below 5 HP ratings may however be started direct-on-line (DOL)

1. ated core having semi-closed slots and short circuit at each end by copper or alu
2. ated core that has partially closed circular slots and that are short-circuited at every end with the copper.; In this motor circuitry, it is not possible to add any exterior resistance
3. An induction motor is practically a constant speed motor, that means, for the entire loading range, change in speed of the motor is quite small. Speed of a DC shunt motor can be varied very easily with good efficiency, but in case of Induction motors, speed reduction is accompanied by a corresponding loss of efficiency and poor power factor.As induction motors are widely being used, their.
4. AC was already identified as having a separate advantage because it allowed high voltage distribution via transformers. 2. The invention of the induction motor nearly simultaneously by Galileo Ferraris and Tesla. (Later Mikhail Dolivo‐Dobrovolsky simplified the motor with the squirrel cage rotor.
5. um and copper on its surface. It is very easy to change the speed of this type of Asynchronous Motor by just changing the shape of the bars in the Rotor
6. ate the user market. Squirrel cage motor: It has a rugged and non-complex construction consisting of a rotor with a la

Where R 2 and X 2 are the rotor resistance and inductive reactance at starting respectively, E 2 is the rotor induced EMF. Here in this equation, the starting torque of the induction motor is proportional to the rotor resistance R 2. The starting torque in a squirrel cage motor is small because of its low rotor resistance and there is no way to insert external resistance as the winding is. I got stuck in an MCQ question. Which is as following : Q.1) power factor of a squirrel cage induction motor is : (a) Low at heavy load only (b) Low at light and heavy loads (c) Low at light load only (d) Low at rated load only. I am getting an answer from what I understand but answer is given some other option. telling which will bias opinions Just like any other motor, a 3 phase induction motor also consists of a stator and a rotor. Basically there are two types of 3 phase IM - 1. Squirrel cage induction motor and 2. Phase Wound induction motor (slip-ring induction motor). Both types have similar constructed rotor, but they differ in construction of rotor. This is explained further classifications of motor types available, but this paper will focus on single-phase AC induction squirrel cage motors which is where the largest number of motors are utilized in ventilation. On the following pages the basic operation and types of AC single-phase induction motor types will be covered

### Induction Motor Question Bank - your electrical guid

1. ium bars placed in the slots and short-circuited by end-rings on both sides of the rotor. Most of single phase induction motors have Squirrel-Cage rotor. One or 2 fans ar
2. The efficiency of an induction motor can be expected to be nearly (a) 60 to 90% (b) 80 to 90% (c) 95 to 98% (d) 99% Ans: b 13. The number of slip rings on a squirrel cage induction motor is usually (a) two (b) three (c) four (d) none Ans: d 14. The starting torque of a squirrel-cage induction motor is (a) lo
3. g from the stator.
4. An induction motor is an electrical device that converts electrical energy into mechanical energy. It is most widely used for industrial applications due to its self-starting attribute. Slip ring induction motor is one of the types of 3-phase induction motor and is a wound rotor motor type
5. Introduction Ø Three-phase induction motors are the most common and frequently encountered machines in industry - - - simple design, rugged, low-price, easy maintenance wide range of power ratings: fractional horsepower to 10 MW run essentially as constant speed from no-load to full load Its speed depends on the frequency of the power source • • not easy to have variable speed control.
6. 3 Phase Induction Motor MCQ With Answer -3, these questions are important for Online AITT CBT Exam of Electrician First Year Trade, all questions are based on NIMI pattern (NSQF Level 5). This question is also important for other competitive exams like Technical Helper, RRB, ALP, Metro, Technician, JDVVNL, JVVNL, UPPCL etc
• Thailand smartphone users.
• Dress Like a Pirate Day 2020.
• Post Office opening times Saturday.
• Why are American school lunches so bad.
• How to check RAM in Ubuntu.
• Love scenes that went to far.
• How to establish residency in New York for college.
• Forest Energy corporation jobs.
• Hardest golf courses in Myrtle Beach.
• St George Riverfront Tourist Park.
• How to check gastric residual NG tube.
• Best free duplicate photo finder 2020.
• Outdoor Emergency Care course California.
• Minecraft lagging on good pc.
• Import SPWeb NoFileCompression.
• Why do scabs itch.
• Psychology of teaching and learning PDF.
• Effective teaching strategies students' ADHD.
• Weather in Pahalgam in March 2021.
• Can you buy liquid nitrogen at Walmart.
• Zee world songs Half Girlfriend.
• Nutmeg vs Moneybox.
• Fate: Undiscovered Realms gems.
• Hay wagon back rack.
• Convert number to binary in java using recursion.
• David Stanley Dodge.
• FedEx netherlands head office.
• Comcast second chance program.
• Break up a couple fast.
• Chuck Schodowski net worth.
• Mole removal OHIP.
• WordPress columns.
• Gmail sign in add account.
• Dabigatran half life in elderly.
• Ubuntu 20.04 server network configuration.
• 2012 Dodge Charger police v6.
• How do humans use sunlight.
• April weather Mississauga.
• Melbourne to Byron Bay via Newell Highway.
• Best car lease deals.
• PRK vs LASIK.