Last Answer : The speed of a universal motor is generally reduced by using gear trains.
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96 views
1 answer
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Mar 20, 2018
by
anonymous

Last Answer : The repulsion-start induction-run motor is used because of high starting torque.
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89 views
1 answer
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Mar 20, 2018
by
anonymous

Last Answer : A schrage motor can run on zero slip, negative slip, positive slip.
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67 views
1 answer
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Mar 20, 2018
by
anonymous

State working principle of universal motor with the help of diagram.
Last Answer : Working Principle of Universal motor : It is modified DC series motor which can work on AC as well as DC supply. According to basic motor principle, whenever a current carrying conductor is placed in magnetic ... They have nearly same operating characteristic for both AC and DC supply.
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152 views
1 answer
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Aug 17, 2019
by
anonymous
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applications of each: i) Universal motor ii) Stepper motor.
Last Answer : i) Applications of Universal motor: 1) portable drills 2) hair dryers 3) grinders 4) mixers 5) table-fans 6) blowers 7) polishers 8) Kitchen appliances ii) Applications of Stepper motor ... 7) robotics 8) CNC machine 9) Control systems 10) Biomedical applications 10) XY recorder 11) plotters
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141 views
1 answer
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Aug 17, 2019
by
anonymous
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State two applications of 1) Shaded pole motor 2) Universal motor
Last Answer : (i)Applications of Shaded pole motor: 1. Small fans 2. Toy motors 3. Hair dryers 4. Ventilators 5. Electric clocks 6. Record players 7. Motorized valves 8. Gramophones 9. Photocopying ... 5. Portable Drilling Machines 6. Electric Shavers 7. Mechanical computing Machines 8. Machine Tools etc.
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125 views
1 answer
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Jul 26, 2019
by
anonymous

Draw and explain working of universal motor. Give two applications of universal motor.
Last Answer : Figure of Universal motor: Operation of universal motor on A.C. and D.C. supply: *A universal motor works on either DC or single phase AC supply. When the universal motor is ... , regardless of AC or DC supply, universal motor works on the same principle that DC series motor works.
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361 views
4 answers
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Jul 20, 2019
by
anonymous

Last Answer : The speed of a universal motor is usually reduced by using gearing.
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115 views
1 answer
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Mar 20, 2018
by
anonymous

Last Answer : Speed control of a universal motor is achieved by varying field flux with tapped field windings, connecting rheostat in series, applying variable voltage by means of silicon controlled rectifier, applying variable voltage by means of variable auto-transformer.
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100 views
1 answer
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Mar 20, 2018
by
anonymous

Last Answer : A universal motor is one which can be operated either on D.C. or A.C. supply at approximately the same speed and output.
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71 views
1 answer
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Mar 20, 2018
by
anonymous

Last Answer : In a universal motor, the most common cause of brush sparking is open armature winding, shorted armature winding, shorted field winding, high commutator mica.
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147 views
1 answer
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Mar 20, 2018
by
anonymous

Last Answer : The speed/load characteristics of a universal motor is same as that of D.C. series motor.
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175 views
1 answer
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Mar 20, 2018
by
anonymous

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

Last Answer : The direction of rotation of universal motor can be reversed the by reversing the flow of current through either armature winding or field winding.
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255 views
1 answer
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Mar 20, 2018
by
anonymous

Last Answer : In a ceiling fan employing capacitor run motor secondary winding surrounds the primary winding.
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101 views
1 answer
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Mar 20, 2018
by
anonymous

Last Answer : In a capacitor start and run motors the function of the running capacitor in series with the auxiliary winding is to improve power factor.
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712 views
1 answer
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Mar 20, 2018
by
anonymous

What human gestures are universal?
Last Answer : The bird. That speaks in every language. Thumbs up also seems pretty universal.
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1 answer
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Feb 28
by
anonymous

What is a Universal Blood Donor and a Universal Blood Recipient?
Last Answer : A universal blood donor is a person who is eligible to donate blood to any person in the world, except for a few set of people. The universal blood donor must have O- (O negative) blood group in ... type, even O-. So, the donor as well as recipient must be careful while involving in this process.
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4 views
1 answer

A universal RLC bridge uses?
Last Answer : A universal RLC bridge uses Maxwell Wein bridge for measurement of inductance and modified De Santy's bridge for measurement of capacitance.
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312 views
1 answer
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Mar 21, 2018
by
anonymous

How to Run a Business Meeting
Last Answer : How to Run a Business Meeting Some people in business believe that too much time spent on a meeting can lower productivity. Meetings, however, are necessary to keep everyone in the group updated on what ... in reading this article, you'll surely be eager to learn how to schedule a business meeting.
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7 views
1 answer
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May 10, 2021
by
anonymous

How to Run Faster ?
Last Answer : How to Run Faster Running speed is a combination of everything from weight, leg turnover (how fast your legs move), cardio conditioning and muscle. The following are 8 ways you can learn to run faster: ... course - run safely. Watch traffic. Do not overtrain. If injured, seek help (EG Shin splints)
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7 views
1 answer
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May 6, 2021
by
anonymous

Instant 100 meters (How fast to run 100 meters?)
Last Answer : Instant 100 meters (How fast to run 100 meters?) This guide outlines the step-by-step preparation for the most efficient 100-meter run. 0-15 meters With your head down, you need to ... length. Constant training and the right technique will allow you to improve your 100 meter running results.
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4 views
1 answer
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Mar 27, 2021
by
anonymous
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Last Answer : A rotory converter can also be run as a synchronous motor.
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77 views
1 answer
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Mar 20, 2018
by
anonymous

Which type of heater is cheapest to run?
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64 views
0 answers
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Mar 11, 2018
by
anonymous

The number of poles in a phase induction motor at 50 Hz and running at 1500 rpm will be?
Last Answer : The number of poles in a phase induction motor at 50 Hz and running at 1500 rpm will be 4.
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143 views
1 answer
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Mar 26, 2018
by
anonymous

Last Answer : When a D.C. series motor is connected to A.C. supply, the power factor will be low because of high inductance of field and armature circuits.
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119 views
1 answer
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Mar 20, 2018
by
anonymous

Last Answer : The wattage of motor for driving domestic sewing machine will be around 100 to 150 W.
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103 views
1 answer
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Mar 20, 2018
by
anonymous

Last Answer : The wattage rating for a ceiling fan motor will be in the range 50 to 150 W .
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177 views
1 answer
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Mar 20, 2018
by
anonymous

Last Answer : In case of a shaded pole motor the direction of rotation of the motor is from main pole to shaded pole.
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339 views
1 answer
asked
Mar 20, 2018
by
anonymous
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Last Answer : In A.C. series motor compensating winding is employed to reduce sparking at the brushes.
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145 views
1 answer
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Mar 20, 2018
by
anonymous

Last Answer : In a two value capacitor motor, the capacitor used for running purposes is paper spaced oil filled type.
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162 views
1 answer
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Mar 20, 2018
by
anonymous

Last Answer : In split-phase motor auxiliary winding is of thin wire placed at the top of the slots.
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72 views
1 answer
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Mar 20, 2018
by
anonymous

Last Answer : Single phase induction motor usually operates on 0.6 power factor lagging.
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127 views
1 answer
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Mar 20, 2018
by
anonymous

Last Answer : A single-phase induction motor is inherently non-self-starting with low torque.
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73 views
1 answer
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Mar 20, 2018
by
anonymous

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

Last Answer : A hysteresis motor works on the principle of hysteresis loss.
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121 views
1 answer
asked
Mar 20, 2018
by
anonymous
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Last Answer : A shaded pole motor can be used for toys, hair dryers, circulators etc.
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103 views
1 answer
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Mar 20, 2018
by
anonymous

Last Answer : The power factor of a single-phase induction motor is usually lagging.
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191 views
1 answer
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Mar 20, 2018
by
anonymous

Last Answer : In a capacitor start single-phase motor, when capacitor is replaced by a resistance motor will continue to run in same direction.
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223 views
1 answer
asked
Mar 20, 2018
by
anonymous

Last Answer : Direction of rotation of a split phase motor can be reversed by reversing the connection of either running winding or starting winding.
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358 views
1 answer
asked
Mar 20, 2018
by
anonymous

Last Answer : The direction of rotation of an hysteresis motor is determined by position of shaded pole with respect to main pole.
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230 views
1 answer
asked
Mar 20, 2018
by
anonymous

A capacitor-start single phase induction motor is switched on to supply with its capacitor replaced by an inductor of equivalent reactance value. It will?
Last Answer : A capacitor-start single phase induction motor is switched on to supply with its capacitor replaced by an inductor of equivalent reactance value. It will not start at all.
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232 views
1 answer
asked
Mar 20, 2018
by
anonymous

The running winding of a single phase motor on testing with meggar is found to be ground. Most probable location of the ground will be?
Last Answer : The running winding of a single phase motor on testing with meggar is found to be ground. Most probable location of the ground will be at the slot edge where coil enters or comes out of the slot.
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116 views
1 answer
asked
Mar 20, 2018
by
anonymous

Last Answer : In a single phase motor the centrifugal switch disconnects auxiliary winding of the motor.
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269 views
1 answer
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Mar 20, 2018
by
anonymous

Last Answer : In repulsion motor direction of rotation of motor is the same as that of brush shift.
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116 views
1 answer
asked
Mar 20, 2018
by
anonymous

Last Answer : The value of starting capacitor of a fractional horse power motor will be 300 uF .
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98 views
1 answer
asked
Mar 20, 2018
by
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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879 views
1 answer
asked
Mar 20, 2018
by
anonymous

Last Answer : In a shaded pole single-phase motor, the revolving field is produced by the use of shading coils.
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205 views
1 answer
asked
Mar 20, 2018
by
anonymous

Last Answer : In a shaded pole motor, the shading coil usually consist of a single turn of heavy copper wire which is short-circuited and carries only induced current.
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130 views
1 answer
asked
Mar 20, 2018
by
anonymous

Last Answer : The rotor developed by a single-phase motor at starting is zero.
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90 views
1 answer
asked
Mar 20, 2018
by
anonymous
