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