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What is the value of the specific electric loading for the continuous duty motor type?
Answer: b Explanation: The specific electric loading for continuous duty motor type is 6000-9000 A per m. The specific electric loading for power rating above 100 W but below 200 W is 8000-11000 A per m and the specific electric loading for power rating above 200 W but below 750 W is 12000-20000 A pRead more
Answer: b
See lessExplanation: The specific electric loading for continuous duty motor type is 6000-9000 A per m. The specific electric loading for power rating above 100 W but below 200 W is 8000-11000 A per m and the specific electric loading for power rating above 200 W but below 750 W is 12000-20000 A per m.
What is the range of the power factor for the 4 pole motors?
Answer: a Explanation: The power factor for the 4 pole motors is 0.6-0.85. The power factor for the 2 pole motors is 0.75-0.95.
Answer: a
See lessExplanation: The power factor for the 4 pole motors is 0.6-0.85. The power factor for the 2 pole motors is 0.75-0.95.
For what outputs are the 2 pole machines made use of?
Answer: b Explanation: The 2 pole machines are made use of when the output is below 200 W. The 4 pole machines are made use of when the output is above 200 W.
Answer: b
See lessExplanation: The 2 pole machines are made use of when the output is below 200 W.
The 4 pole machines are made use of when the output is above 200 W.
What is the range of the transformation ratio in the pole machines?
Answer: c Explanation: The transformation ratio in 2 pole motors is 0.1-0.25. The transformation ratio in the 4 pole motors is 0.05-0.1.
Answer: c
See lessExplanation: The transformation ratio in 2 pole motors is 0.1-0.25. The transformation ratio in the 4 pole motors is 0.05-0.1.
What is the relation of the copper loss and brush contacts with the total loss in universal commutator motors?
Answer: b Explanation: The copper loss and brush contact loss is being compared with the total loss in order to deduce equations. The copper loss and brush contact loss is half the total loss.
Answer: b
See lessExplanation: The copper loss and brush contact loss is being compared with the total
loss in order to deduce equations. The copper loss and brush contact loss is half the
total loss.
What is the relation of the copper loss and brush contacts with the total loss in small dc motors?
Answer: b Explanation: The copper loss and brush contact loss is being compared with the total loss in order to deduce an equation. The copper loss and brush contact loss is 2/3 times the total loss.
Answer: b
See lessExplanation: The copper loss and brush contact loss is being compared with the total
loss in order to deduce an equation. The copper loss and brush contact loss is 2/3 times the total loss.
The number of turns of field winding in the motor must be considerably less than the number of turns in the armature winding.
Answer: a Explanation: The number of turns of field winding in the motor must be considerably less than the number of turns in the armature winding. The speed of the machine is irrespective of the supply.
Answer: a
See lessExplanation: The number of turns of field winding in the motor must be considerably less than the number of turns in the armature winding. The speed of the machine is
irrespective of the supply.
How many type of excitations does the universal commutator motors have?
Answer: b Explanation: There are two kinds of excitation present for the universal commutator motors. One winding is intended to run the motor to ac supply voltage. The other winding is connected in series with the first winding when the motor is operated from dc supply voltage.
Answer: b
See lessExplanation: There are two kinds of excitation present for the universal commutator
motors. One winding is intended to run the motor to ac supply voltage. The other
winding is connected in series with the first winding when the motor is operated from dc supply voltage.
What is the thickness of the laminations of magnetic poles?
Answer: c Explanation: The minimum value of the thickness of the laminations of magnetic poles is 0.35 mm. The maximum value of the thickness of the laminations of magnetic poles is 0.5 mm.
Answer: c
See lessExplanation: The minimum value of the thickness of the laminations of magnetic poles is 0.35 mm. The maximum value of the thickness of the laminations of magnetic poles is 0.5 mm.
What is the material used in the lamination of the magnetic poles of small universal commutator motor?
Answer: d Explanation: Unlike dc motors universal commutator motors are having laminated poles. The laminated poles are laminated using the sheet steel.
Answer: d
See lessExplanation: Unlike dc motors universal commutator motors are having laminated poles. The laminated poles are laminated using the sheet steel.