340 Basic Electrical Component Circuits

Question 1

switch symbols

Question 2

What are two factors that determine the ratings for different load characteristic?

Answer 2

1) the surge current at the instant the switch is closed

2) the current-breaking capacity for opening the switch under maximum current

Question 3

In a DC circuit the voltage is always at a __________.

Answer 3

maximum value

Question 4

________ during contact- make and ________ during contact- break are more ______ in DC circuits.

Answer 4

contact welding
contact arcing

Question 5

A mechanical device used to open and close an electric circuit is called __________.

Answer 5

a switch

Question 6

Each movable contact in a switch is called _______.

Answer 6

a pole

Question 7

Each individual make/beak operation of a switch is called _______.

Answer 7

a throw

Question 8

Switches are generally rated in terms of the ______ across the contacts when the switch is open and the ______ through the switch when its closed.

Answer 8

maximum voltage
maximum current

Question 9

A factor that governs the contact ratings for different load characteristics is the ______ at the instant the switch is closed, often found in a motor circuit

Answer 9

surge current