問題一覧
1
what is the minimum size grounding wire required when grounding the steel riser pipe coupling?
#6 Cu
2
the main purpose of an auto loop is?
eliminate outages due to temporary faults
3
when overhead service is not attached to a building, but is passing along the building clearance between the service and the windows shall not be less than?
5’6”
4
install arc clamps at all skinned transitions except:
all of the above
5
the purpose of vacuum recloser switches is?
to automatically isolate permanent faults on a dist. Feeder.
6
the “ “ has two sensing transformers.
tie
7
when is a black top porcelain insulator required?
on 27kv bare conductor only
8
the purpose of sectionalizing switches is to?
provide closer fault isolation on an autoloop
9
when using a polymer pin insulator in 4 & 13 kv primary installations, involving bare copper conductor, what type of wire is required?
#6 Cu bare tie wire
10
when is a riser cable squirrel guard required?
primary riser
11
how many gang-operated switches are typically placed between every two reclosers?
3
12
the required distance between the bushing or current limiter fuse on a transformer to the primary phase is?
2’4”
13
how many automatic line splices are allowed per span?
2
14
when are grounding lugs installed with air switches?
all of the above
15
at what depth should the top of the ground rod be from the grade?
6” below grade
16
what is the minimum attachment height for a secondary service at the building?
20’
17
automatic line splices shall not be used in “spacer” type installations:
true
18
which of the following is NOT a standard autoloop configuration?
four recloser
19
in general, CATV cable or equipment must be a minimum of “ “ below the lowest live conductor on a pole.
40”
20
the horizontal minimum clearance from a building or other supporting structures is 7’6” for?
4 & 13kv
21
what is the required minimum distance, away from the pole, for a driven ground?
6”
22
what voltage does a white pole badge represent?
4 kv
23
the minimum horizontal clearance from a building or other supporting structures for 27 & 33 kv is?
10’
24
the first recloser on a feeder after the station breaker is the “ “ recloser
feeder
25
alley arm primary construction is used mainly for?
horizontal clearance
26
“ “ lighting arrestors are required on normally closed switches?
0
27
there is/are “ “ midpoint recloser(s) in a three recloser autoloop?
0
28
what are the horizontal distances for 4 & 13kv primary wires from buildings?
7’6”
29
what is the minimum distance between the bottom of the transformer and a Cable TV attachment?
2’6”
30
black rubber TPR covered #4 Al tie wire is used on?
covered wire on a polymer insulator
31
how many air break switches are typically placed between two gang-operated switches?
one set of three
32
the first ground rod installed at a location must be a minimum of “ “ from the pole?
6”
33
when making any kind of connection copper to aluminum
the copper must be below the aluminum
34
when picking up “cold load” with Cooper Power Vacum recloser the manual switch of the recloser must be held in the “close” position for how long?
3 seconds
35
if a ground rod cannot be driven to its full depth due to rocky conditions, what should the worker do?
drive the rod as deep as possible and/or install rod at the nearest pole
36
when are animal guards reqired for installation?
all of the above
37
upon sensing a loss of potential, a “ “ recloser will close unless it has a?
tie
38
the West Farms, Riverdale, and Redhook autoloops are all?
non-standard autoloops
39
what is the minimum distance between the bottom of the secondary rack and the Cable TV attachment?
3’4”
40
the minimum above road clearance for a overhead service is?
18’
41
on a 27 kv cross arm construction, B phase is located?
on the sidewalk side
42
a cold shrink terminator may be installed on jacketed concentric neutral and xip or epr lead cable?
true
43
which of the following is a FALSE statement?
autoloops are cheaper to install than radial distribution feeders
44
what is the minimum height allowed for 4 & 13kv primary above a sidewalk? accessible only to pedestrian’s?
15’
45
blocking of a recloser can be accomplished at the?
upper housing low voltage compartment
46
when a fault occurs on a five recloser loop between a midpoint recloser and the tie recloser, the first piece of equipment to operate is a?
feeder recloser
47
the customer service area with the most autoloop system is?
westchester
48
what is the minimum pole size required on a tangent and small angle arm primary construction?
45’ class 1
49
the normally open recloser in an autoloop is called “ “ recloser?
tie
50
an automatic line splice must be at least “ “ from the end of any wire tie.
10”
51
all anchor guys are grounded to the state neutral
false
52
a cold shrink terminator may be installed on jacketed concentric neutral and xip or epr lead cable?
true
53
when a feeder recloser first senses an over current condition, it?
trips on a fast curve and recloser after 1 second
54
after the first ground rod is installed the if the resistance measured is “ “ or less, no additional rods are required.
25 ohms