NEIEP 400 FINAL EXAM NEWEST -

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NEIEP 400 FINAL EXAM NEWEST -

ACTUAL EXAM 250 QUESTIONS AND CORRECT

DETAILED ANSWERS (VERIFIED ANSWERS)

|ALREADY GRADED A+ ||BRAND NEW!!

What does the Right - hand Rule for motors determine ? - ANSWER- Direction of the current carrying conductor movement in a magnetic field

What is the inherent current - limiter present for a rotating motor armature called ? - ANSWER- CEMF

What effect does the EMF produced through induction have on the applied EMF of a motor armature ? - ANSWER- Opposes the applied EMF

What does the amount of induced voltage in a wire depend on when moving it through a magnetic field ? - ANSWER- Both B and C

What is electromagnetism ? - ANSWER- Magnetism generated by current flowing through a coil of wire 1 / 4

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Which of the following elements are present when operating a motor or generator ? - ANSWER- All of the above

An electromagnetic field in a generator is created by having current flow in the ___? - ANSWER- Coils wound around the pole piece

What provides the connection for the ends of the armature coils to the commutator ? - ANSWER- Riser

The pole pieces of a DC Motor are made of many thin layers of iron or steel called ___? - ANSWER- Laminations .

The neutral plane is ___? - ANSWER- The points in a coil's rotation where zero voltage is induced

What is the name of the field having only a few turns of heavy wire ? - ANSWER- Series

What is the result of an improperly balanced armature - ANSWER- Vibration

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What can be used to compensate for armature reaction ? - ANSWER- Interpole windings

Which of the following describes a pole piece's inability to proportionally change its magnetic flux as changes in voltage occur ? - ANSWER- Hysteresis losses

Which of the following uses a pigtail - ANSWER- Brush

How many pieces make up the shaft of a DC machine ? -

ANSWER- 1

How is an armature shaft balanced at the factory or repair facility - ANSWER- Adding or removing epoxy weights to the shaft or windings

Mica is used as a / an ___? - ANSWER- Insulator

Which of the following is used to lubricate a sleeve bearing ? - ANSWER- Oil

Which of the following is used to lubricate a ball bearing ? - ANSWER- Grease 3 / 4

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The frame of a DC Machine is ___? - ANSWER- All of the above

Which of the following identifies waste currents induced in the core . material of the armature and field pieces ? - ANSWER- Eddy currents

What does the brush rigging fasten to ? - ANSWER- One of the end bells

In a separately - excited generator , where does field excitation current come from ? - ANSWER- An external power source

In a DC series generator - ANSWER- Current flows only when there is a load

What is the generator series field connected in parallel with ? - ANSWER- Shunt field

How is motor speed changed ? - ANSWER- By varying the field or armature voltage

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