Deck 1: General Principles of Motor Control, Symbols and Schematic Diagrams

Question 1

Push buttons are always shown as normally open.

Answer 1

False

Question 2

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

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

Answer 2

stacked

Question 3

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

Answer 3

circle

Question 4

What are lighted push buttons?

Question 5

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

Question 6

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

Question 7

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

Question 8

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

Question 9

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

Question 10

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

Question 11

Discuss operator safety and control systems.