Question 1: In Compound Generator Which of the following losses are constant?
- Copper losses
- Magnetic losses
- Mechanical Losses
NEC CODE
NEC 2023
DC Generator theory
Free online quiz on DC Generator theory which includes losses of dc generator, construction, types and operation of DC Generator.
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The National Electrical Code (NFPA 70) is the benchmark standard for safe electrical installation in the US. It is updated every 3 years by the NFPA.
Study the edition adopted by your state. As of 2025, most states use the 2020 or 2023 NEC. These tests are written to the 2023 edition.
The most tested articles are 100 (Definitions), 200–250 (Wiring & Grounding), 300–314 (Wiring Methods), 400–411 (Conductors), 430 (Motors), and 700–701 (Emergency Systems).
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TimeDC Generator theory — Question List
Question 2: If a DC Generator is Operated at lower speed than rated speed, the DC generator ..............
- may be over heated
- may be over excited
- will damage
Question 3: The voltage of a DC Generator can be controlled by ............
- varying the prime mover speed
- varying the field current
- changing the brush positions
Question 4: Which of the following generator part changes the induced AC voltage to the DC voltage at generator terminals?
- Armature
- commutator
- brushes
- rotor
Question 5: In DC Generator, which of the following is the effect of <em>armature reaction</em>?
- Motoring effect
- high sparking at brushes on commutator
- damages the field winding
- damages the armature winding
Question 6: Which of the following is not required in DC generator to generate DC Voltage?
- magnetic field
- conductor
- relative motion
- slip rings
Question 7: The torque developed in DC Generator is inversely proportional to armature current.
- True
- False
Question 8: Which of the following DC Generator is used when a constant output voltage is required?
- DC Shunt Generator
- DC Series Generator
Question 9: In DC Generator, The armature current is inversely proportional to load current.
- True
- False
Question 10: In DC Series generator, the terminal voltage changes with the change in load current.
- True
- False
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