ECT RT3 Test Flashcards
Resistors in parallel, what happens to current, if one of the resistors opens?
Resistors in parallel, current will drop off for what reason?
Resistors in series, if the resistance increases, what happens to the voltage on the next?
Resistors in series, the voltage will decrease on the neighboring resistor, if what happens to the first?
Resistors in series, what happens to the voltage on a resistor if the resistance increases?
Resistors in series, the voltage on a resistor will increase when what happens to the resistance?
Resistors in series, what happens to the amperage if one resistor increases resistance?
Resistors in series, amperage, will decrease if this happens?
What are the requirements for a circuit?
A power source plus a complete circuit equals?
How much higher is inrush current compared to seal in current?
What is 10 to 12 times higher than seal in current?
What eliminates chatter?
What do shading rings do? 
What causes chatter?
Oscillation of current caused by a sign wave, trying to hold a contactor closed 
Power loss in the form of heat is caused by what?
What effect does eddy currents have on a circuit?
Inductive proximity sensors are used to detect what type of material?
What type of proximity sensor should you use to detect metal?
What type of material can capacitive proximity sensors sense?
What sensor should you use to detect all types of materials?
The on and off points of an inductive proximity sensor is called what? It prevents chattering.
Hysteresis is determined by what and what is it used for? 
What is the range of photo detectors?
What can detect a target at a distance between 5 mm to over 250 m? 
Transmitted beam photo detectors are set up how?
What detector has both a light source and a receiver?
What has the longest sensing distance and highest operating margin?
Can transmitted beam cutter detectors, be used for long distances, or short distances?
How are retro Reflective photo detectors set up?
What photo detector uses a reflector?
How is a diffuse photo detector set up?
What photodetector does not need a receiver or reflector?
What does light operate mode mean?
What type of photo detector is on when it sees itself?
What does dark operate mode mean?
What type of photo detector is on when it does not see itself?
What type of detector has an inherent blind zone at the sensing face?
What is the problem with ultrasonic proximity sensors?
Which sensor would you probably use to see 25 m? To see longer distances.
When are you most likely to use an ultrasonic proximity sensor?
Is an overload confined to normal circuit paths?
when an overcurrent is confined to normal circuit paths, is that an overload or a short circuit? 
Is a short circuit confined to normal circuit pass
When an overcurrent is not confined to a normal circuit pass, is that an overload or short circuit?
An overload is how many times greater than normal current?
What is 1 to 6 times greater than normal current?
Short circuit current is how many times greater than normal current?
What is hundreds of times greater than normal current?
Interrupting rating is the maximum value of what that a fuse can safely handle?
The maximum amount of current a fuse can safely handle is called what?
If a fuse operates quickly, What is it called?
A current limiting fuse does what?