The motor used for electric traction is (1) D.C. shunt motor (3) D.C. series motor (2) D.C. compound motor (4) Synchronous motor
Last Answer : The motor used for electric traction is D.C. series motor
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May 1, 2018
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anonymous
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Where are portable screw compressors used?
Last Answer : Where are portable screw compressors used? The use of a portable screw air compressor in road, construction, mining and installation works indicates that its area of practical use is ... with these important, but fairly simple requirements will significantly lengthen the life of your compressor.
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Mar 29, 2021
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anonymous
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Badminton Drills
Last Answer : Badminton is a game of skill and skill is acquired through practice. No self-respecting badminton player goes a day without practice. Here are some useful badminton drills for beginners: Shadow ... -are always crucial in the overall development and build up of a well-rounded badminton player.
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Describe the reason of using dc series motor for electric trains.
Last Answer : Electric trains require an inverse torque speed characteristics for proper operation. That is a higher torque is required at start (when speed is nil or low) and as the train picks up ... torque - speed characteristics of DC series motors match, these motors are suitable for electric trains
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Sep 18, 2018
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anonymous

Last Answer : The power mentioned on the name plate of an electric motor indicates the output power available at the shaft.
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Mar 20, 2018
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anonymous

Last Answer : The motor used for the compressors is capacitor-start capacitor-run motor.
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Mar 20, 2018
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anonymous

Last Answer : The shaded pole motor is used for low starting torque.
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Mar 20, 2018
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anonymous

Last Answer : The speed control of universal motor used for sewing machines is by varying the resistance.
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Mar 20, 2018
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anonymous

Select insulating materials for following parts : (i) Insulation between heating element and base plate of electric iron. (ii) Insulation used over copper or aluminium conductor used for making coils. (iii) Transformer bushings. (iv) Insulation between transmission line and pole.
Last Answer : Parts Insulating Materials Insulation between heating element and base plate of electric iron. Mica Insulation used over copper or aluminium conductor used for making coils. ... Transformer bushings Porcelain Insulation between transmission line and pole. Porcelain
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May 7, 2020
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anonymous

The storage battery generally used in electric power stations is (1) zinc carbon battery (2) lead acid battery (3) nickel cadmium battery (4) lithium -ion battery
Last Answer : The storage battery generally used in electric power stations is lead acid battery
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Apr 29, 2018
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anonymous

How can a magnetic field be used to generate an electric current?
Last Answer : Magnetic field can be used to generate electric current on a condition that it is on a rate of changing magnetic flux. (Faraday's law)
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Mar 10, 2018
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anonymous

Write the steps to rewind an electric motor
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An electric motor in which both stator field and rotor rotates with same speed is called?
Last Answer : An electric motor in which both stator field and rotor rotates with same speed is called synchronous motor.
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Mar 18, 2018
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anonymous

What is an electric motor drive?
Last Answer : An electric drive is a complex electromechanical system that drives various actuators in industrial and industrial work machines. In this case, control is carried out using a technological process ... calculation of the kinematic and load characteristics of the electric drive is carried out.
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Mar 10, 2018
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anonymous

How does an electric motor works?
Last Answer : In the electric motor there are two types of part 1)moving and 2)stationary In stationary part containing field winding whis use to provide uniform maganetic field it at inner side of yoke In moving ... on it and this force is from all direction we can say it is torque.and motor armature rotates
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Dec 16, 2017
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anonymous

What is the use of an electric motor?
Last Answer : Electrical motors are use for converting electrical energy to mechanical energy. It may be use in fans, pumps, washing machine, cranes, trains, factories, industries etc.
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Dec 16, 2017
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anonymous

Portable Cement Mixers
Last Answer : Portable concrete mixers, just like other concrete mixers, come in various styles. One type of portable concrete mixer is one that has to be transported to a job site. The concrete mix then has to be ... yard or specific location much easier, allowing you to pour and mix the cement at your own pace.
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Mini Portable Cement Mixers
Last Answer : Have you ever wondered if there is an easier way to do small cement mixing jobs? Have you ever considered finding a more efficient way to make a small amount of concrete, mortar plaster or another type ... adjustable hitches so that it can pour out of the cart and onto the spot that is being poured.
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How to Make a Portable Water Purifier
Last Answer : Having a portable purifier at home ensures that you and your family are drinking clean, microbe-free water. Just by running tap water onto the apparatus, it enacts on the liquid, filtering ... an assurance of good health. For more information regarding this article, read how to purify water.
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Last Answer : In a portable instrument, the controlling torque is provided by spring.
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Mar 21, 2018
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anonymous

State the insulating materials used in motor. Write temperature class and withstand temperature ranges for them.
Last Answer : The insulating materials used in motor are as belows: 1. Cotton, 2. Silk, or paper, 3. Press board, 4. Resins 5. PVC 6. Cellulose-Fiber, 7. Enameled coating, etc ... Over 180° Mica, porcelain, ceramics, glass quartz, asbestos, treated glass fiber or treated asbestos. etc.
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May 7, 2020
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anonymous

State starters used for i) 3-Ph squirrel cage induction motor (3HP) ii) D.C. motor
Last Answer : Name the starters used for following motors : i) 3 H.P. 3-Ph squirrel cage I.M: i) DOL starter OR ii) Star-Delta Starter OR ii) Auto transformer starter OR iii) Soft start starter. ii) D.C Shunt Motor : 1) Armature resistance starter (Three Point Starter) OR 2) Four Point Starter
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Sep 18, 2018
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anonymous
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Last Answer : The repulsion-start induction-run motor is used because of high starting torque.
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Mar 20, 2018
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anonymous
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Last Answer : In a two value capacitor motor, the capacitor used for running purposes is paper spaced oil filled type.
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Mar 20, 2018
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anonymous

Last Answer : The motor used on small lathes is usually single-phase capacitor run motor.
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Mar 20, 2018
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anonymous

Last Answer : A shaded pole motor can be used for toys, hair dryers, circulators etc.
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Mar 20, 2018
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anonymous

Last Answer : A centrifugal switch is used to disconnect starting winding when motor has picked up about 50 to 70 per cent of rated speed.
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Mar 20, 2018
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anonymous

The damping winding in synchronous motor is generally used to?
Last Answer : The damping winding in synchronous motor is generally used to provide starting torque and prevent hunting.
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Mar 18, 2018
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anonymous

Which type of starter is used to start the DC motor?
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Mar 15, 2018
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anonymous

Which type of motor is used in lift?
Last Answer : Synchronous motor
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Mar 11, 2018
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anonymous

Why DC motor is used for traction?
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Mar 11, 2018
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anonymous
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Which motor is used in traction system?
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Mar 11, 2018
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anonymous

If you were to be personified as a hand tool, I.E. combination wrench, screwdriver, etc. what tool would you be?
Last Answer :
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Feb 28
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anonymous

A _________ is used to measure the stator % winding temperature of the generator. (A) Thermocouple (B) Pyrometer (C) Resistance thermometer (D) Thermometer
Last Answer : A Resistance thermometer is used to measure the stator % winding temperature of the generator.
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May 8, 2018
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anonymous

Peterson coil is used for : (A) shunt compensation of lines (B) grounding of system neutral (B) reduce fault currents (D) connecting interconnected systems
Last Answer : Peterson coil is used for : grounding of system neutral
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Apr 29, 2018
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anonymous

Stepper motors are used in (1) printers (2) lifts (3) amplifiers (4) oscillators
Last Answer : Stepper motors are used in printers
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Apr 29, 2018
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anonymous

In a dc machine, interpoles are used to (1) neutralize the effect of armature reaction in the interpolar region (2) generate more induced emf in the armature (3) avoid interference of the armature flux with the main -field flux (4) reduce the demagnetizing effect of armature reaction
Last Answer : In a dc machine, interpoles are used to neutralize the effect of armature reaction in the interpolar region
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Apr 29, 2018
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anonymous

Last Answer : In D.C. machines fractional pitch winding is used to reduce the sparking.
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Mar 20, 2018
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anonymous

Last Answer : Starters are used with D.C. motors because to restrict armature current as there is no back e.m.f. while starting.
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Mar 20, 2018
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anonymous
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Last Answer : The capacitors used in single-phase capacitor motors have no polarity marking.
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Mar 20, 2018
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anonymous

What are the five types of single phase motors used in the industry?
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Mar 15, 2018
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anonymous

Split phase induction motor
Last Answer : Split phase induction motor : There are two windings used in split phase induction motor. It is a type of single-phase induction motor. There are two winding one is called main winding and ... motor have low starting torque it is used for small fans, blowers, centrifugal pumps, grinders etc.
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Sep 20, 2018
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anonymous

A 240 V, dc shunt motor draws 15 A while supplying the rated load at a speed of 80 rad/s. The armature resistance is 0.5 W and the field winding resistance is 80 W. The net Voltage across armature resistance at the time of plugging will be
Last Answer : A 240 V, dc shunt motor draws 15 A while supplying the rated load at a speed of 80 rad/s. The armature resistance is 0.5 W and the field winding resistance is 80 W. The net Voltage across armature resistance at the time of plugging will be 474 V
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May 8, 2018
by
anonymous
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Damper winding in a synchronous motor
Last Answer : Damper winding in a synchronous motor Serves to start the motor.
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May 8, 2018
by
anonymous
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In a double squirrel cage induction motor, good starting torque is produced as (A) Large current flows through the outer high resistance winding. (B) Large current flows through the inner high ... the outer high resistance winding. (D) Large current flows through the inner low resistance winding.
Last Answer : In a double squirrel cage induction motor, good starting torque is produced as Large current flows through the outer high resistance winding.
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May 8, 2018
by
anonymous

A change of 4% in the supply voltage to an induction motor will produce a change of approximately
Last Answer : A change of 4% in the supply voltage to an induction motor will produce a change of approximately 8% in the rotor torque
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May 8, 2018
by
anonymous

A 200 V dc shunt motor is running at 1000 rpm and drawing a current of 10 A. Its armature winding resistance is 2 Ohm. It. is braked by plugging. The resistance to be connected in series with armature to restrict armature current to 10 A, is
Last Answer : A 200 V dc shunt motor is running at 1000 rpm and drawing a current of 10 A. Its armature winding resistance is 2 Ohm. It. is braked by plugging. The resistance to be connected in series with armature to restrict armature current to 10 A, is 36 Ohm
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May 3, 2018
by
anonymous

In an induction motor if the flux density is reduced to one-half, of its normal value then the torque will (1) reduce to one-half (2) reduce to one-fourth (3) remain unchanged (4) increase four times
Last Answer : In an induction motor if the flux density is reduced.to one-half, of its normal value then the torque will reduce to one-fourth
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May 1, 2018
by
anonymous

The speed of a three-phase induction motor is controlled by variable voltage variable frequency control (i.e. keeping V/f constant). As the frequency is reduced, the slip at maximum torque (1) Decreases (2) Increases (3) Remains constant (4) None of the above
Last Answer : The speed of a three-phase induction motor is controlled by variable voltage variable frequency control (i.e. keeping V/f constant). As the frequency is reduced, the slip at maximum torque Increases
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May 1, 2018
by
anonymous
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The number of poles of 8/6 stepper motor can be :
Last Answer : The number of poles of 8/6 stepper motor can be : 4
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Apr 30, 2018
by
anonymous
