問題一覧
1
What do you need to be carful of when using a grinder?
sparks
2
What size staple do you need for a 14/3 wire?
S2
3
Electrical discharge has 10A load what is the new amperage? (Double number of amps)
20A
4
What do you need to make a hole bigger?
Knock out
5
Determine the largest size of aluminum conductors that can be installed in a wireway?
750kcmil
6
Who is responsible for maintaining the exit sign or the emergency system?
Building Code of Canada
7
Thermal overload opens because of?
Prolonged excessive current
8
Weter to the diagram below, which letter indicates the ultimote point beyond which the downstream ungrounded circuit conductors must be de-energized in the event of a ground fault in the circult fed by such conductors.
B
9
What size aluminum ground is required for a 100A service?
4
10
What is the madmum distance between an electrical heating unit and a disconnecting means?
9m and within sight
11
What is the minimum allowable voltage rating for an HVAC unit when supplied from a 600 V supply?
570V
12
Refer to the figure below. When will the horn sound?*Refer to the figure below. When will the horn sound?*
The horn will sound 10 seconds after stop button
13
Dielectric liquid-filled electrical equipment containing 23 L of liquid or less in one tank, shall be
Provided with a metal pan.
14
What is the length X in the following pull box?
162mm
15
The voltage is reading 85% on a 4-20m device, what is the output signal?
17.6ma
16
Dielectric liquid-filled electrical equipment containing 23 L of liquid or less in one tank, shall be
Provided with a metal pan.
17
An AC generator on a plan drawing is not starting during a power outage, what is the cause?
The battery charger failed to charge the generator battery
18
What happens to the lights in the drawing?
Light does not turn on
19
Motor line diagram. What happens?
M3 starts, M1 and M2 start simultaneously
20
How many receptacles must be GFCI protected? (Diagram)
2
21
How many light switches are needed? (Diagram)
27
22
How many receptacles are needed in the (diagram)
38
23
What is a class B fire alarm system?
has diodes and end of line resistor
24
What is in the image?
Ladder logic “B”
25
How do you reverse this?
A1 + A2
26
What are the voltmeters reading?
0V,208V,0V,208V
27
Due to voltage drop what size wire can be used from the start of device?
14 AWG
28
Rough in inspection happens when?
before work is concealed
29
Primary secondary transformer question.
+5% “D”
30
Exit sign has what components?
AC and DC
31
Split phase motor. What windings do you use?
T5,T8
32
What signaling is shown?
hoist up slowly
33
Parallel battery how to correct it?
3V,3A
34
Voltage drop question 2%
4 AWG
35
How many volts is on the image?
48V
36
How many volts in this image ?
24V
37
What is the load on the neutral?
4A
38
“X” is brighter why?
pitted contacts
39
What will happen to the motor?
motor will not start
40
What state is the motor?
on
41
How many conductors at the photocell?
3
42
Normally open F is fused. What happens?
will not work in reverse
43
Limit switch diagram
letter D
44
Adjacent to panel (splitter question)
100A
45
Question has 120/2
60A (also A)
46
Pool? (Section 68-064)
1.5m protection
47
50 and 20 in question. (Add)
70A
48
58 number in question. (Double it and choose closes to 100)
100A
49
How to limit noise on a VFD?
reactor
50
Terminating CAT5 cables?
cut and fold
51
What conductor must be AFCI?
NMD90
52
What is the minimum size wire laid in a raceway?
19 AWG
53
What is the minimum size wire pulled in a raceway?
16 AWG
54
Photovoltaic voltage drop for 48VDC?
2.4V
55
What type enclosure for rain and snow?
3
56
What do you use for exposed parking lot light wiring ?
insulated compression lugs
57
Load for 85m squared floor area?
24,000w 100A
58
Max distance supports for 21mm trade size ?
1.5m
59
Max weight a heater can be hung from a ceiling?
23kg
60
600V, 3 phase Ground fault light for phase B is on - Vollege between phase A and B is what?
600V
61
What voltage for photovoltaic system?
30V
62
Min copper grounding conductor ?
6 AWG
63
Min aluminum grounding conductor?
4 AWG
64
Lights dimming. Why?
open neutral
65
Warning sign distance for high voltage?
10m
66
Distance between cable tray?
300mm
67
Distance from I beam?
150mm
68
A split receptical keeps tripping. What must you do to fix this?
break tab on ungrounded side
69
What is the headspace for MCC?
1m
70
Nurse correction factor?
.7
71
Direct burial 750V or less? (Table 53)
600mm
72
Question about a thermostat?
100%
73
Catholic protection wire size? (Section 80)
12 AWG
74
Communication cable in a plenum ?
FT6
75
Communication cable in plenum temperature?
60°
76
Rooftop receptical needed for maintinence
5-20R
77
3 o receptical?
L17-30R
78
Vertical supports for 3AWG? (Section 12-120 Table 21
24m
79
Overcurrent protection in commercial setting? (Section 14-104 2.)
15A
80
4 or more integral setting? (Size wire)
22 AWG
81
Transformer letter?
A
82
.___.^.___. What is this?
AFCI
83
What size disconnect for NTD fuses?
200A
84
Maximum breaker for 347V or less HIID luminaire?
40A
85
Maximum breaker for 600V HIID luninair?
15A
86
When does lockout tagout procedure need to be done?
when servicing or repairing equipment
87
Bonding of a fence near a pool? (Gates)
1.5m
88
What size BONDING conductor for service (aluminum)
6 AWG
89
What protects workers on a scaffold?
orange pylons bellow
90
What is the largest breaker for a 120V mogal base light for a mall?
40A
91
What type of protection for across-set-line starter with the holding contacts in parallel with the start? (Less than 750V)
low voltage protection
92
How many supports for a 16mm and 27mm for 15m of distance on the same rack?
10
93
Two #2 lugs and a split bolt (table D6) for 2/0?
43.5
94
How do you reverse the leads on a 1ø motor?
start windings
95
What is the demand factor for a dwelling unit?
75%
96
What is the W/M for a warehouse? (Table 14)
5w/m
97
What does the beggar read to ground?
.9m
98
What is the distance between heated ceiling and wire?
50mm
99
What is the fault interruption for GFCI?
6ma
100
High voltage headspace ?
22m