101 Basic Series - Module 18 - CEU Education
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1
When a relay contact is Normally Open (NO), there is an open contact when the relay is energized.]
2
A____ solid state relay is used to control transformers and heavy inductive loads.
3
____ is recommended for applications with very high temperatures, heavy dust deposits, or corrosive atmospheres.
4
The body of a terminal block insulates the wire termination to maximize heat generated by current passing through the wire.
5
The clamping device secures the wire and makes an electrical connection between the wire and the current bar.
6
A single-break contact breaks the circuit in one place, while a double-break contact does it in two.
7
The flexibility of terminal blocks allows wiring to be centralized, making it easier to maintain complex control circuits.
8
Terminal blocks are classified as DIN (IEC) or NEMA.
9
When a relay contact is Normally Closed (NC), there is a closed contact when the relay is energized.
10
The number of poles on a relay, depending on its design, can go to a maximum of 12 poles.
11
The____ is the portion of a solid state relay activated when a voltage higher than its pick-up voltage is applied.
12
Terminal blocks can be added or pulled off the rail but you have to move the other terminations.
13
General-purpose relays operate with AC or DC current, at common voltages (12V to 230V), and at currents from 2A to ____.
14
A ____ contact can control one circuit.
15
Accessories, such as additional poles, transient suppressors, etc, can be added to general purpose relays.
16
Because the mounting rail dimensions differ on NEMA terminal blocks, they are not easily interchangeable between manufacturers.
17
Power is removed from the timer, and a preset period of time passes before the contacts return to their normal state when using a(n)____ timing function.
18
____ is recommended for applications where the continuous operating temperature is between 110 and 140C.
19
With the ____ method of connection to a terminal block, the wire is held in place with a metallic plate when the screw is tightened.
20
The most accurate, least expensive, and easiest to repair kind of timers are solid state.
 
   



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