General Knowledge Flashcards
(158 cards)
1
Q
Rubber Glove Class 0 (color and max use voltage)
A
Red / 1,000 volts
2
Q
Rubber Glove Class 1 (color and max use voltage)
A
White / 7,500 volts
3
Q
Rubber Glove Class 2 (color and max use voltage)
A
Yellow / 17,000 volts
4
Q
Rubber Glove Class 3 (color and max use voltage)
A
Green / 26,500 volts
5
Q
Rubber Glove Class 4 (color and max use voltage)
A
Orange / 36,000 volts
6
Q
MAD distance .05 to 1kV
phase to ground
phase to phase
A
avoid contact
7
Q
MAD distance up to 15kV
phase to ground
phase to phase
A
phase to ground 2’ 1”
phase to phase 2’ 2”
8
Q
MAD distance up to 36kV
phase to ground
phase to phase
A
phase to ground 2’ 4”
phase to phase 2’ 7”
9
Q
MAD distance up to 46kV
phase to ground
phase to phase
A
phase to ground 2’ 7”
phase to phase 2’ 10”
10
Q
MAD distance up to 72.5kV
phase to ground
phase to phase
A
phase to ground 3’
phase to phase 3’ 6”
11
Q
how often rubber gloves electrically tested
A
every 6 months
12
Q
how often rubber sleeves electrically tested
A
every 12 months
13
Q
how many volts have a class “E” hard hat passed for
A
20,000 volts
14
Q
minimum continuous ventilation in an enclosed space
A
at least 200 cubic feet per minute per occupant
15
Q
define instantaneous value of AC voltage
A
the actual value of the voltage and current at each instant in the cycle. this value is not measured with an ordinary meter.
16
Q
define peak value of AC voltage
A
is the highest instantaneous value that the voltage and current reach in both directions during the cycle.
17
Q
define average value of AC voltage
A
is obtained by calculating the average of all the instantaneous values in half a cycle.
18
Q
define effective value of AC voltage
A
is the value of a DC and voltage that would have the same heating effect.
19
Q
active power is also referred to as?
A
effective power, true power, or real power
20
Q
apparent power is?
A
the total power supplied be a circuit. apparent power is a combination of active power and reactive power.
21
Q
reactive power is?
A
the element in the apparent power formula that does not do any work.
22
Q
power factor is?
A
the ratio of active power to apparent power
23
Q
which side of a wood pole is its “face”
A
the concave or inside of the sweep or bow
24
Q
which side of a wood pole is its “back”
A
the convex side
25
where does framing and equipment go a wood pole?
the face of the pole
26
whats blue glad hands used for
service lines
27
whats red glad hands used for
emergency lines
28
minimum tie down distance for trailer loads
10 feet
29
#2 copper MAC ampacity
230 amps
30
1/0 copper MAC ampacity
310 amps
31
2/0 copper MAC ampacity
355 amps
32
4/0 copper MAC ampacity
480 amps
33
carbon in oil of transformer is an indication of what
arching
34
formula for conductor weight on a pole
weight = span a + span b divided by 2 x weight per foot x safety factor.
the safety factor is 2 for spans 250 feet or less
the safety factor is 1.5 for spans greater than 250 feet
35
how many volts per foot is hot sticks tested to
100,000 volts
36
what is the Working Load Limit WLL based on
breaking strength of the equipment divided by a safety factor
37
safe working load limit for 1/4" manila rope
120lbs
38
when was PCB's banned by the EPA
1979
39
what should you do to Aluminum bolts and can they be re torqued
lube, no
40
spoil piles must be kept at least _ feet from the edge of a trench. anything within that must be added to ___ _____ __ ___ ______.
2 feet, the depth of the trench
41
you can rubber glove a maximum of ___ volts phase to phase directly off the pole without an insulated platform
5KV
42
a magnet is normally made out of
iron
43
a volt meter is connected in series/parallel with a circuit
parallel
44
a watt meter is connected in series/parallel with a circuit
series
45
an ammeter is connected in series/parallel with a circuit
series
46
a mill measures how much of an inch?
one/one thousandth of an inch .001
47
rectifiers do what?
change DC to AC
48
```
of these rope materials, which is the strongest
nylon
polypropylene
manila
sisal
```
nylon
49
how do you determine the mechanical advantage of a block and tackle
count the number of lines in the moving block
50
bucket trucks operate on what type of hydraulic system?
open and closed
51
digger trucks operate on what type of hydraulic system?
open and closed
52
T/F, it is ok to check the hydraulic fluid of the y-35 hand pump in the field?
no false
53
pole strength is determined by what?
strength to resist loads applied 2 ft. from top of pole
54
what 3 things determine pole depth?
height of pole, soil characteristics, weight and pull factors
55
in step regulator the primary winding is connected in ________ with the line while secondary winding is connected in _________ with the line
Parallel, series
56
the top changer switch in a regulator is _______driven and immersed in _____
motor, oil
57
name 2 factors to take into consideration when sagging conductor
temperature, span length, size of conductor
58
what's the purpose of armor rod?
reinforce conductor and reduce chafing
59
what is the hazard of a broken series street light circuit?
the constant current transformer could be at maximum voltage output
60
how do you test an old pole to make sure it is safe to climb?
visual inspection, sound inspection and a bore inspection (18 inches beneath the ground)
61
why are the metallic cases of transformers, circuit breakers, regulators, etc, grounded?
for the protection of public, workers, and equipment.
62
how are primary and secondary windings of a transformer coupled?
magnetically coupled through mutual induction
63
adding parallel loads to a circuit will _______ total circuit resistance and ________ the total circuit current
decrease, increase
64
how does an analog meter operate?
on the magnetic principal that like poles repel each other
65
what are the two basic types of analog ohmmeters?
series and shunt
66
name 2 advantages for 4 wire feeders over 3 wire feeders?
cheaper to build, more efficient
67
what is used to prevent a series street light form being completely interrupted by a burnt out lamp?
film disc cutout
68
what should always be done before opening a series street light circuit?
drop all load and take constant current transformer out of service
69
why must you be careful to adequately ground neutral conductors
so fault current dissipates before causing damage to cable or equipment
70
what moves the windings apart on a constant current transformer?
magnetic repulsion
71
how do you find the circular mil cross area of wire from the diameter in inches?
convert inches to mils (move decimal point 3 places to right) square that number
72
what are substation disconnects used for?
isolate equipment , by-pass equipment, transfer loads, and as a grounding device
73
maximum current to be broken by a disconnect switch?
50 amps
74
a primary metering installation has a current transformer with a 30:5 ration and a potential transformer with a 7200:120 ratio. to find the KWH consumed you must
multiply the meter dial reading by 360.
| divide the two ratios and multiply them together
75
wye delta and delta wye banks must be connected with one of two possible angular displacements. these angular displacements are either?
30 or 210
76
what are the 4 possible angular displacement with transformer banks?
0, 30, 180, 210 degrees
77
how should poles face on a steep grade?
face up the grade
78
should poles next to a street crossings face the street?
yes
79
what is meant by ranking a pole?
moving a pole against the direction of the strain
80
name 3 types of pole roofs
slant, gable, flat
81
the side of the pole which has the longest concave sweep between the ground line and the point of the load
face or belly
82
gains should be cut into what side of the pole?
face
83
how deep should gains be?
1/2 and inch
84
an arm that is placed at right angles to a line arm is called a
buck arm
85
a class 2 pole is _______ than a class 6 pole
larger
86
ground rods should be long enough to reach the _______ moisture level of the soil?
permanent
87
what are two types of counterpoise grounding?
continuous (parallel)
| crowfoot (radial)
88
list two methods to test if a line is dead before installing protective grounds?
high voltage volt meter
| tic tracer
89
33,000 foot-pounds per minute is equal to one
horsepower
90
when properly sharpened, the gaff should not have a spike point, but should function as a
chisel
91
what is the definition of power?
the rate at which work is done
92
define a guy
a brace or cable attached to the pole to strengthen it and keep it in position
93
when you visually inspect rubber gloves what are you looking for?
correct voltage (dielectric strength) for application to be used on, ozone cutting, and mechanical damage
94
which winding of a constant current transformer is movable?
secondary
95
what must be done to the secondary side of a current transformer before heating up the primary side?
shorted, shunted, or hooked up
96
if you don't short or shunt or hook up the secondary side of a CT before heating up the primary side what will happen?
high circulating current will appear
97
the polarity mark of an instrument transformer is normally connected to what side?
load side
98
in general what are transformer used for metering installations called?
instrument transformers
99
what is the white bushing of an instrument transformer?
polarity mark
100
typical rule for capacitor placement
2/3 of the distance where the voltage has dropped by 2/3
101
how are distribution and substation capacitors connected?
distribution - parallel
| substation - series
102
two types of capacitors are
switched and fixed
103
volt =
amount of potential that will cause 1 coulomb to do 1 joule of work
104
three types of hydraulic reclosers and ratings
H- type operates 5 to 50 amps
L - type operates 25 to 280 amps
D - type are voltage specific
105
which rope is considered an insulator?
clean dry polypropylene rope
106
two types of transformer construction?
core type and shell, shell most common
107
how should a one bushing capacitor be treated
it should be treated as a one bushing transformer, due to improper grounding the case can become hot
108
do capacitors have voltage ratings?
yes
109
can a 6 CKVA capacitor bank consist of 6 - 100 CKVA capacitors?
yes
110
what is a megger?
a device used for testing high voltage insulation resistance
111
define air arrestor
air gap in series with a resistor
112
what are the three methods used to cool a transformer?
oil, air and water
113
what current are constant current transformers usually fixed at?
6.6 amps
114
whats an OTDR
optical time delay reflectometer, used to test fiber
115
list the three major components of an implosive compression splice for an ACSR conductor
steel sleeve inner, aluminum sleeve outer, aluminum sleeve
116
what is a maximeter?
a clamp on ammeter having two indicating pointers, one indicates the current at the time of the reading and the other indicates the maximum current since instillation
117
does the load on a capacitor ever change?
NO, always draws the same amount of current
118
how does a capacitor improve power factor and voltage?
by providing leading current
119
why must gas treated poles be set with extra caution?
they can conduct as much as 90% to ground
120
can a line be without load and still carry a current?
yes this is called charging current
121
what 3 physical dimensions determine pole classification?
length, circ, 6 ft from bottom, and circ. of top
122
T/F , in parallel operation, the transformer with the higher impedance will carry the greater load
false, higher impedance = more resistance
123
what 2 main parts is OSHA made of
29 CFR (code of federal regulations) 1910 for general industry and 1926 for construction
124
what OSHA article is a performance standard to address employees who are directly involved with power generation, transmission and distribution
1910.269 standard
125
what OSHA article covers job briefings?
1910.269(c)
126
what OSHA article covers lockout/tagout?
1910.269(d)
127
what OSHA article covers enclosed spaces?
1910.269(e)
128
what OSHA article covers personal protective equipment?
1910.269(g)
129
what OSHA article cover live line tools?
1910.269(j)
130
what OSHA article covers working on or near exposed live line parts?
1910.269(l)
131
what OSHA article covers minimum approach distances?
1910.269(l)(2)
132
what OSHA article covers grounding for the protection of the employees?
1910.269(n)
133
how many IBEW vice presidential districts are there?
11
134
how many IBEW International
| Executive Council Districts
8
135
how often does the IBEW international convention meet
every 5 years
136
who was the first president of the IBEW?
Henry Miller
137
when was the IBEW organized?
November 28, 1891
138
AC sine wave represents one cycle and is ___ electrical degreese, with max value of ____ degreese and a opposite max value of _____ degreese
360, 90, 270
139
a low power factor due to lagging current condition can be improved by?
adding capacitors to the line (ELI) inductive circuit needs capacitance to improve power factor
140
the use of insulating equipment such as _____ ______ can protect line workers handling grounded equipment and conductors from hazardous touch potentials
rubber gloves
141
____ _________ adjust voltage plus or minus 10%, they have __ boost and __ buck at _% each step
step regulators, 16, 16, 5/8%
142
substation controlling equipment receives the signals sent from the sensing equipment, examples of controlling equipment are an __________ relay that operates a circuit breaker, or a ______ relay that can make a tap changer operate.
overcurrent relay, voltage
143
OSHA requires a protection system for employees in a excavation 5' or more. what are the four choices for protection?
benching, sloping, shoring, or shielding
144
some switch gear can be overcurrent protective device, other examples could be: circuit breaker, recloser, or a _____ ___ ___ (sectionalizer could also be a correct anwer)
fused cut out
145
rubber hose and blankets max phase to phase rating of 36kV are class __
4 orange, (rubber cover up ratings parallel the same ratings as rubber gloves)
146
a conductor with diameter of 1" would convert to how many kc mils?
1000 kc mills
147
a 250 kc mill cable is ____ " in diameter?
.25 or 1/4" in diameter
148
definition of hypotenuse?
the longest side of a right triangle, opposite the right angle.
149
transformer ______ ratios and transformer _____ ratios are directly proportional
voltage and turns ratios
150
closed wye wye or closed delta delta can have one of two angular displacements?
0 degrees, 180 degrees
151
closed wye delta or closed delta wye can have one of two angular displacement?
30 degrees, 210 degrees
152
an ____ ___________ is a type of transformer with a single tapped high voltage winding. they are often used in transmission substations for 230kV to 161kV transformation
auto transformer
153
step type voltage regulator are a type of auto transformer with primary winding connected ________ with the line and the secondary winding connected _____ with the load
primary connected parallel, secondary connected series
154
fall arrest equipment, work positioning equipment, or travel restricting equipment must be used by workers at elevated positions more than _ ____ above ground on poles, towers and similar structures unless the individual is a qualified climber who is free climbing to change location on the structure.
4 feet
155
work from a platform attached to a pole at an elevation greater than _ ____ from surrounding elevations requires the use of appropriate fall protection at all times while working from the platform
6 feet
156
live line tools constructed of FRP (fiberglass-reinforced plastic) must be able to successfully withstand _______ volts per foot
100,000 volts
157
a means of egress such as a stairway, ladder, ramp or similar, must be located in trench excavations that are _ ____ or more in depth so as to require no more than __ ____ of lateral travel
4 feet or more, 25 feet of lateral travel
158
a _________ ______, as defined by OSHA, is someone who is capable of identifying existing and predictable hazards in the surroundings, or working conditions which are unsanitary, hazardous, or dangerous to employees, and who has authorization to take prompt corrective measures to eliminate them
competent person
