問題一覧
1
an electrical diagram showing the approximate location of the components is called ________
pictorial diagram
2
an electrical power consuming component
uses power and is normally wired in parallel
3
an ____ is the easiest diagram to use to follow a circuit. this diagram normally can be studied briefly and the circuit function should become obvious.
ladder diagram
4
how are relay coil rates
voltage and frequency
5
how are schematic diagram generally read?
left to right
6
indentify the N.O contacts of this relay
1 and 3 9 and 11 6 and 7
7
select one
N.O start switch
8
schematic diagram represent the ______of operation
Logical sequence
9
the best type of dwitch to detect airmovement is called
sail switch
10
the continuity through a heat relay is checked using
ohmmeter
11
the normally open contacts of the above relay would be which terminal contacts?
5 and 3 6 and 4
12
use above diagram what terminal are the coil powered from?
2 and 7
13
what could this switch be use for
high limit safety control on a furnace
14
what could this switch be use for
both a and b
15
what could this switch be use for
high pressure cut out safety control
16
what does point represent on the above diagram
24 volt control circuit power
17
what does point b represent on the above diagram
push button control circuit switch
18
what does this schematic symbol represent
normally open disconnect switch
19
what does this symbol represent
sail/flow switch that make on rise
20
what does this symbol represent
open on rise in level float switch
21
what does this symbol represent
normally closed contact
22
what does this symbol represent
N.O contact
23
what does this symbol represent
close on rise in pressure switch
24
what does this symbol represent
relay coil
25
what does this symbol represent
make on rise in level float switch
26
what is another name for a schematic diagram
ladder
27
what does this symbol represent
double pole single throw
28
what does this symbol represent
double throw double throw
29
what does this symbol represent
single pole single throw
30
what does this symbol represent
single pole double throw
31
when a contactor coil is energized how much resistance should be measured between terminal L1 and T1
zero ohms
32
wiring and schematic diagrams are generally shown in the ____state
De-energized
33
an example of a power consuming device would be a ____ while and examoke of a non power consuming device would be a _____
ligh bulb single pole single throw switch