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