3-PHASE INDUCTION MOTOR -1
Master the 3-Phase Induction Motor Quiz
Test your knowledge on the principles of 3-phase induction motors with our engaging quiz! Perfect for engineering students, professionals, and motor enthusiasts looking to enhance their understanding of induction motor design, efficiency, and components.
Key features of the quiz:
- 10 carefully crafted multiple-choice questions
- Explore various aspects of induction motors
- Improve your technical expertise in electrical engineering
1. The frame of an induction motor is usually made of ___________
Silicon steel
Cast iron
Aluminium
Bronze
2. The shaft of an induction motor is made of ____________
High speed steel
Silicon steel
Carbon steel
Cast iron
3. In medium sized induction motors, the slip is generally around __________
0.04%
0.4%
4%
14%
4. In squirrel cage induction motors, the rotor slots are usually given slight skew in order to ____________
Reduce windage loss
Reduce eddy current loss
Reduce accumulation of dirt and dust
Reduce magnetic hum
5. In case the air gap in an induction motor is increased _____________
the magnetising current of the rotor will decrease
The power factor will decrease
Speed of motor will increase
The windage losses will increase
6. Slip rings are usually made of ____________
Copper
Carbon
Phosphor bronze
Aluminium
7. A 3-phase 440V, 50Hz induction motor has 4% dlip. The frequency of rotor e.m.f. Will be ____________
200 Hz
50 Hz
2 Hz
0.2 Hz
8. If Ns is the synchronous speed and s the slip, then actual running speed of an induction motor will be _____________
Ns
SNs
(1 - s)Ns
(Ns - 1)s
9. The efficiency of an induction motor can be expected to be nearly ___________
60 to 90%
80 to 90%
95 to 98%
99%
10. The number of slip rings on a squirrel cage induction motor is usually __________
2
3
4
None
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