Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
22 Cards in this Set
- Front
- Back
|
Practical uses of electricity were not recognized until late into what century?
|
18th
|
|
|
What is the application and removal of power in its simplest form?
|
Circuit control
|
|
|
Most circuit control devices are either switches, solenoids, or what else?
|
Relays
|
|
|
Over how many switches might a typical aircraft have to control lights, electronic systems, and to indicate whether the landinggear is up or down? |
250 |
|
|
Which type of switch is controlled by a person?
|
Manual |
|
|
Which type of switch is controlled by a mechanical or electrical device? |
Automatic |
|
|
Multicontact switches are usually classified by the number of poles and numberof what?
|
Throws |
|
|
Which type of switch is a midcontact switch part of the schematic with the contacts arranged in a full or partial circle?
|
Rotary |
|
|
Which term means that the switch will only remain in the momentary position as long as the actuator is held in that position?
|
Momentary |
|
|
Which type of switch is a switch in which the movement of the switch mechanism (contacts) is relatively independent ofthe activating mechanism movement? |
Snap-acting |
|
|
What is the accurate snap-acting switch commonly called?
|
Microswitch
|
|
|
Which switch property refers to the maximum current the switch is designedto carry? |
Current rating |
|
|
Which switch property refers to the maximum voltage allowable in the circuit in which the switch is used? |
Voltage rating |
|
|
How many or more times without failure are most switches designed to operate if the voltage and current ratings are notexceeded? |
100,000 |
|
|
What is a control device that uses electromagnetism to convert electrical energy into mechanical motion?
|
Solenoid |
|
|
What is produced from current flowing through a conductor? |
Magnetic field
|
|
|
What is the first step for troubleshooting a solenoid?
|
Visual inspection
|
|
|
What are electrically operated control switches?
|
Relays
|
|
|
What are power relays referred to as?
|
Contactors
|
|
|
What problem may be created at the contacts when current flows in one direction through a relay?
|
Cone and crater
|
|
|
What type of tool is used to clean the contacts of a relay?
|
Burnishing
|
|
|
What tool is used to adjust contact spacing of a relay?
|
Point bender
|
