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The most complicated method of starting a motor is across-the-line starting.

A) True
B) False

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False

Discuss operator safety and control systems.

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Probably the most important function of ...

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What are lighted push buttons?

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Lighted push buttons are an example of providing a second function in a single space. They are generally used to indicate that a motor is running, stopped, or tripped on overload. Most lighted push buttons are equipped with a small transformer to reduce the control voltage to a much lower value. Lens caps of different colors are available.

Push buttons are always shown as normally open.

A) True
B) False

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The symbol for a float switch illustrates a ball float. It is drawn by adding a ____ to a line.


A) sphere
B) circle
C) square
D) triangle

E) B) and C)
F) A) and B)

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When a machine is installed, the motor, machine, and controls are all interrelated and must be considered as a unit.

A) True
B) False

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Push buttons that contain multiple contacts are often called ____ push buttons.


A) normally closed
B) pull
C) stacked
D) lighted

E) None of the above
F) A) and B)

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Fuses and circuit breakers are generally employed for circuit protection, and ____ are used to protect the motor.


A) MOVs
B) rampings
C) varistors
D) overload relays

E) A) and B)
F) A) and C)

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D

What are the similarities and differences between automatic and semiautomatic control?

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Automatic control is very similar to sem...

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Motor control systems can be divided into three major types: ____________________, semiautomatic, and automatic.

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The conductor size, fuse or circuit breaker size, and overload size are generally determined using the ____.


A) NEMA Code letter
B) National Electrical Code
C) SF
D) voltage

E) None of the above
F) B) and C)

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