Chapter 19 review
Inclement weather
Summer
Winter
Spring
Aerial lift power source, emergency stop, and lower functions
Fuel levels including level of propane tanks
Weather protection and organization within the aerial bucket
Supply of cones, flags, and reflective tape for work-area protection
Safety-belt lanyard and bucket-eyehook attachments
Junction boxes
Maintenance holes (MHs)
Pull boxes
Man holes (MHs)
Handholes (HHs)
Preserve the aesthetic appearance of the premises
Are adaptable for future facility placement or removal
Are economical over a long life
Require careful route planning
Provide the security of additional physical cable protection
Trench-buried
Plowed-buried
Direct-buried
Nonpathway-buried
May be more flexible for future service changes
Usually has a low initial installation cost
Preserves the aesthetic appearance of the building
Encourages accurate route planning
Can easily bypass obstructions
152 mm (6 in)
305 mm (12 in)
610 mm (24 in)
915 mm (36 in)
25 year
30 year
40 year
50 year
60 year
True
False
Electronic
Sonar
Water Vacuum
Air Vacuum
Always have 3 or more workers on site
Be shored to prevent cave-in
Have a minimum clearance of 305 mm (12 in) from the edge of the excavated dirt pile to the nearest edge of the trench
Have a minimum clearance of 610 mm (24 in) from the edge of the excavated dirt pile to the nearest edge of the trench
25 mm (1 in)
51 mm (2 in)
76 mm (3 in)
102 mm (4 in)
101 mm (4 in)
204 mm (8 in)
305 mm (12 in)
408 mm (16 in)
76 mm (3 in)
101 mm (4 in)
152 mm (6 in)
305 mm (12 in)
152 mm (6 in) when crossing
610 mm (24 in) when parallel
179 mm (8 in) when crossing
574 mm (20 in) when parallel
305 mm (12 in ) when parallel
1.0 m (3.3 ft)
2.0 m (6.6 ft)
2.5 m (8.3 ft)
3.0 m (9.9 ft)
1.5 m (5 ft) on either side
3 m (10 ft) on either side
3 m (10 ft) from the outside pipes
4.5 m (15 ft) from the outside pipes
3.8 m (12 ft)
4.5 m (15 ft)
7.6 m (25 ft)
9.2 m (34 ft)
152 mm (6 in)
232 mm (10 in)
305 mm (12 in)
430 mm (16 in)
A compact trencher
A vibratory plow
A horizontal directional boring
All of the above
A compact trencher
A vibratory plow
A backhoe
Directional drilling
Back hoeing
Directional drilling
Vibratory plow
Compact trench
Ground mat grid underfoot as insulation protection
Insulated boots and gloves
Hard hat
Safety glasses
All of the above
4 times
6 times
10 times
12 times
305 mm (12 in)
475 mm (18 in)
610 mm (24 in)
786 mm (30 in)
Minimum conduit depth cannot be attained
Conduits pass under roads, driveways, or railroad tracks
Bend points might be subject to movement
All of the above
True
False
Fiber and/or fiberglass
Rigid iron metal
Concrete
Rigid galvanized metal
Rigid and nonrigid nonmetallic
45 kg (100 lb)
69 kg (150 lb)
90 kg (200 lb)
135 kg (250 lb)
True
False
Between 3.7 m (12 ft) and 4.5 m (16 ft) use two covers
Between 3.7 m (12 ft) and 6 m (20 ft) use two covers
Over 4.5 m (16 ft) use three covers
Over 6 m (20 ft) use three covers
Bonding inserts and struts for racking
Pulling eyes at least 22 mm (7/8 in) in diameter
A sump of at least 200 mm (8 in) in diameter
An entry ladder (e.g. where feasible)
A noncorrosive metal tag in MH collar with MH size or MH volume
12,000 kPa (1740 psi)
18,000 kPa (2680 psi)
24,000 kPa (3480 psi)
30,000 kPa (4560 psi)
True
False
Buildind side
Roadside
Open side
Field side
00= weakest
00= strongest
10= weakest
10= strongest
305 mm (12 in)
498 mm (18 in)
610 mm (24 in)
765 mm (30 in)
Inverse storm loading due to wind pressure on the attachments
Transverse storm loading due to wind pressure on the attachments
Vertical loading due to the weight of the attachments
Horizontal loads due to the weight of the attachments
Bending moments due to eccentric loads or to unbalanced tensions at unguyed corners and deadends
True
False
Bundled duct
Joint duct
Figure 8 duct
Support duct
True
False
Provides physical protection to the cable sheath
Discourages accurate route planning
Usually has a low initial installation cost
Discourages accurate record keeping
Preserves the aesthetic appearance of the building
Does not provide physical protection to the cable sheath
Can bypass obstructions
6 in
8 in
10 in
12 in
Electrical
Nondetectable
Hardened shell
Detectable
Fiber and/or fiberglass
Black iron pipe
Concrete
Rigid galvanized metal
Rigid and nonrigid nonmetallic
Road side
Field side
P for Telephone
C for CCTV
TV for CCTV/CATV
E for Entrance
True
False
Field side
Road side
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