Last Answer : A shell-type transformer has reduced magnetic leakage.
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83 views
1 answer
asked
Mar 19, 2018
by
anonymous

Last Answer : Primary winding of a transformer could either be a low voltage or high voltage winding.
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86 views
1 answer
asked
Mar 19, 2018
by
anonymous

Last Answer : Starting winding of a single phase motor of a refrigerator is disconnected from the circuit by means of a magnetic relay.
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215 views
1 answer
asked
Mar 20, 2018
by
anonymous

Last Answer : In split phase motor main winding is of thick wire placed at the bottom of the slots.
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83 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 capacitor start motor, the phase displacement between starting and running winding can be nearly 90°.
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207 views
1 answer
asked
Mar 20, 2018
by
anonymous

Last Answer : In a split phase motor, the running winding should have low resistance and high inductance.
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99 views
1 answer
asked
Mar 20, 2018
by
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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3.4k views
1 answer
asked
May 8, 2018
by
anonymous

Last Answer : In D.C. machines fractional pitch winding is used to reduce the sparking.
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355 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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875 views
1 answer
asked
Mar 20, 2018
by
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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157 views
1 answer
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Mar 18, 2018
by
anonymous

A certain transformer has 200 turns in the primary winding, 50 turns in the secondary winding and 120 volts applied to the primary. What is the voltage across the secondary? (A) 30 Volts (B) 480 Volts (C) 120 Volts (D) 60 Volts
Last Answer : A certain transformer has 200 turns in the primary winding, 50 turns in the secondary winding and 120 volts applied to the primary. What is the voltage across the secondary? (A) 30 Volts (B) 480 Volts (C) 120 Volts (D) 60 Volts
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223 views
1 answer
asked
May 8, 2018
by
anonymous

Last Answer : The short circuit in any winding of the transformer is the result of impulse voltage.
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174 views
1 answer
asked
Mar 20, 2018
by
anonymous

Last Answer : yes High Voltage side of Transformer winding have more number of turns. and low voltage side of Transformer winding have less number of turns.
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156 views
1 answer
asked
Sep 30, 2017
by
anonymous

State any four characteristics of core type transformer.
Last Answer : Characteristics of core type transformer: i) It has one window. ii) It has one magnetic circuit. iii) Core surrounds the winding. iv) Average length of core is more. v) Area of cross ... Better cooling for winding. vii) Mechnical strength is comparatively less. viii) Repair and maintenance is easy.
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132 views
1 answer
asked
Jul 27, 2019
by
anonymous

Single phase transformer
Last Answer : Single phase Transformer Transformer
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261 views
1 answer
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May 16, 2020
by
anonymous

With a neat sketch explain working of 1 phase dynamometer type power factor meter.
Last Answer : Working of 1 phase dynamometer type power factor meter : The current coil is connected in series with load. Two pressure coils marked as A and B are connected across the supply terminals ... becomes stationary and the pointer shows steady deflection corresponding to the power factor of the load.
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201 views
1 answer
asked
Sep 6, 2018
by
anonymous
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Last Answer : Induction type single phase energy meters measure electric energy in kWh.
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478 views
1 answer
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Mar 21, 2018
by
anonymous

What type of biasing is used in CE amplifier?
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72 views
0 answers
asked
Mar 22, 2018
by
anonymous

Which type of starter is used to start the DC motor?
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77 views
0 answers
asked
Mar 15, 2018
by
anonymous

Which type of motor is used in lift?
Last Answer : Synchronous motor
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77 views
1 answer
asked
Mar 11, 2018
by
anonymous

What type of meter is used to measure current?
Last Answer : Ammeter
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2.7k views
3 answers
asked
Mar 10, 2018
by
anonymous

Cylindrical type transformer has: (A) Single magnetic circuit (B) Double magnetic circuit (C) All of the above (D) None of the above
Last Answer : Cylindrical type transformer has: Single magnetic circuit
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121 views
1 answer
asked
May 8, 2018
by
anonymous

Transformer coupling introduces which type of distortion?
Last Answer : Transformer coupling introduces Cross over distortion.
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108 views
1 answer
asked
Mar 9, 2018
by
anonymous

Last Answer : Impedance relays are used for phase faults on long line.
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82 views
1 answer
asked
Mar 20, 2018
by
anonymous

What are the five types of single phase motors used in the industry?
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79 views
0 answers
asked
Mar 15, 2018
by
anonymous

Explain the procedure to perform Short Circuit test on single phase transformer with circuit diagram.
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113 views
0 answers
asked
Apr 27, 2020
by
anonymous

Explain construction and working principle of single phase transformer.
Last Answer : A single phase transformers is an electrical device that accepts single-phase AC power and outputs single-phase AC. PRINCIPLE... The single-phase transformer works on the principle of ... and secondary windings. Thin steel laminations shall be employed to prevent power losses from the core.
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1.1k views
4 answers
asked
Jul 26, 2019
by
anonymous

A single phase transformer has resistance and reactance of 0.2 pu and 0.6 pu respectively. Its pu voltage regulation at 0.8 pf lagging would he
Last Answer : A single phase transformer has resistance and reactance of 0.2 pu and 0.6 pu respectively. Its pu voltage regulation at 0.8 pf lagging would he 0.52
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367 views
1 answer
asked
May 3, 2018
by
anonymous

Last Answer : The stator of phase shifting transformer for use in conjunction with an A.C. potentiometer usually has a two-phase winding.
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174 views
1 answer
asked
Mar 21, 2018
by
anonymous

Last Answer : A phase shifting transformer is used in conjunction with Drysdale potentiometer.
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167 views
1 answer
asked
Mar 21, 2018
by
anonymous

IDMT relays are used to protect the transformer against : (A) Internal short -circuits (B) Open circuits (C) External short circuits (D) Oil leakage
Last Answer : IDMT relays are used to protect the transformer against : External short circuits
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3.1k views
1 answer
asked
Apr 30, 2018
by
anonymous

Last Answer : The inverse definite mean time relays are used for over current and earth fault protection of transformer against internal short-circuits.
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2.6k views
1 answer
asked
Mar 20, 2018
by
anonymous

Explain the electrical losses of magnetic materials used for the cores of inductors and transformer.
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87 views
0 answers
asked
Mar 10, 2018
by
anonymous

Damper winding is provided in 3 phase synchronous motors to :
Last Answer : Damper winding is provided in 3 phase synchronous motors to : provide starting torque and prevent hunting
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93 views
1 answer
asked
Apr 29, 2018
by
anonymous

Last Answer : The starting winding of a single-phase motor is placed in stator.
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115 views
1 answer
asked
Mar 20, 2018
by
anonymous

Last Answer : If starting winding of a single-phase induction motor is left in the circuit, it will draw excessive current and overheat.
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234 views
1 answer
asked
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

63 views
0 answers
asked
Aug 13, 2019
by
Alacrity

Last Answer : In the transformer low voltage winding has got more cross-sectional area.
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256 views
1 answer
asked
Mar 19, 2018
by
anonymous
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Last Answer : High voltage winding in a transformer has more number of turns.
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363 views
1 answer
asked
Mar 19, 2018
by
anonymous

Last Answer : High voltage winding of the transformer has less cross-sectional area.
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106 views
1 answer
asked
Mar 19, 2018
by
anonymous

State advantages of short pitch winding over full pitch winding in alternators.
Last Answer : Advantages of Short Pitch Winding over Full Pitch Winding in Alternators: 1) Short pitching reduces the amount of copper needed for end connection when compared with full pitched coil. 2) They ... reduced, thereby increasing the efficiency. 4) The power quality of generated emf is improved.
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478 views
1 answer
asked
May 7, 2020
by
anonymous

Last Answer : It is the wire wound around a aluminium metal it is found commonly in transformers or motors
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106 views
1 answer
asked
Jul 27, 2019
by
anonymous

Damper winding in a synchronous motor
Last Answer : Damper winding in a synchronous motor Serves to start the motor.
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87 views
1 answer
asked
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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331 views
1 answer
asked
May 3, 2018
by
anonymous

A 36 slot, 4 -pole, dc machine has a simplex lap winding with two conductors per slot. The back pitch and front pitch adopted could be respectively
Last Answer : A 36 slot, 4 -pole, dc machine has a simplex lap winding with two conductors per slot. The back pitch and front pitch adopted could be respectively 19,17
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588 views
1 answer
asked
May 3, 2018
by
anonymous
.jpg)
Aluminium is not used as winding wire for the armature of a dc machine because (1) aluminium has low resistivity (2) a large winding space is taken by aluminium conductors and creates ... ) the thermal conductivity of aluminium is low (4) aluminium has low conductivity as compared to copper
Last Answer : Aluminium is not used as winding wire for the armature of a dc machine because (2) a large winding space is taken by aluminium conductors and creates jointing problems (3) the thermal conductivity of aluminium is low (4) aluminium has low conductivity as compared to copper
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621 views
1 answer
asked
Apr 29, 2018
by
anonymous

Last Answer : Wave winding is composed of that even number which is exact multiple of poles + 2.
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90 views
1 answer
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Mar 21, 2018
by
anonymous

Last Answer : Lap winding is composed of any even number of conductors.
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129 views
1 answer
asked
Mar 21, 2018
by
anonymous
