Question 1: The speed of DC series motor is increased by .................
- increasing the field resistance
- strengthening the field flux
- weakening the field flux
BASIC
NEC 2023
DC Series Motor Practice Test Questions
Free online Electrical Practice Tests : DC Series Motor
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TimeDC Series Motor Practice Test Questions — Question List
Question 2: A DC Series motor should not be started under no load condition because .................
- at no load the speed of the DC series motor is very high
- at no load DC series motor cannot develop maximum torque
- it cannot start under no load
- It draws more current at no load.
Question 3: The value of back EMF in a DC Motor is maximum at ..................
- no load
- half full load
- full load
Question 4: When the speed of the DC Motor increases the armature current ..............
- increases
- decreases
- remains constant
Question 5: Which of the following motor has best speed regulation?
- series motor
- shunt motor
- universal motor
- induction motor
Question 6: When the DC series motor is running the speed is basically determined by .............
- field excitation
- load
- armature resistance
- speed is constant
Question 7: The speed of DC series motor is practically constant.
- True
- False
Question 8: The series motor never connected to mechanical load through a belt drive.
- True
- False
Question 9: The DC series motor is used in the applications requiring low torque at low speed.
- True
- False
Question 10: Which of the following applications does the series motor is used?
- cranes and hoists
- cars
- constant speed applications
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