Electric Chapter 7 Quiz Flashcards
(19 cards)
Does the iron core of electromagnet increase or decrease the magnetic lines of force?
Increase
In an electromagnet, what determines the strength of the magnetic field?
Current
What is the left hand rule used to determine when the direction of current flow is known?
Polarity
What is the movable part of a solenoid?
Armature
Why are solenoid armatures laminated?
Reduce Eddy Current (which creates heat)
Why is a shading coil added to the armature of a solenoid?
Hold onto the armature when magnetic flow drops.
What is the initial current draw of a solenoid called?
Inrush Current
What is the operating current of a solenoid called?
Sealed Current
If the voltage applied to a solenoid is higher than the rating of the solenoid, will the current draw increase, or decrease?
Increase
What is the number of times a solenoid can operate in a given time period called?
Duty Cycle
What type of valve is used to direct the flow of fluid?
DCV (Directional Control Valve)
What is the number of locations within a valve in which a spool is placed to direct fluid through the valve called?
Positions
What is a flow path through a valve?
Ways
What does an electrical control valve use to change position of a valve spool?
Actuator
What is the acceptable voltage range that should be applied to a solenoid?
±10% of the rated value
What device is used to reduce transient produced by solenoids?
Snubber Circuits
What is the acceptable resistance range that should be measured when testing a solenoid?
±15%
How many solenoid configurations are there?
5
What are the solenoid configurations?
•Clapper
•Bell Crank
•Horizontal Action
•Vertical Action
•Plunger
