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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This DC Series Motor Practice Test Questions has 10 questions with detailed answers and NEC references. Take the full test, review every wrong answer, and look up the NEC article it references before moving on.
Tip: Work through Ohm's Law problems on paper — don't just read the answers, calculate them yourself.
- Topics covered: Voltage, current, resistance, Ohm's Law, series/parallel circuits, and electrical safety.
- Passing score: Aim for 90%+ on basic theory — these fundamentals underpin every advanced topic.
- Questions: 10 multiple-choice, one correct answer each
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15 min
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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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