Chapter 8 Flashcards
Protective wire entanglements are normally placed how many feet away to prevent the enemy from effectively using hand grenades? (Page 8-3)
131 to 328 feet
What is an entanglement “one fence” in depth? (Page 8-4)
Belt
What consists of two or more belts in depth, with no interval between them? (Page 8-4)
Band
What consists of two or more bands or belts in depth with intervals between them? (Page 8-4)
Zone
Barbed wire Concertina roadblocks should be placed about how many feet apart? (Page 8-6)
33
Standard barbed wire is a two-strand twisted No. 12 steel wire with four-point barbs at how many inch intervals? (Page 8-6)
4
Barbed wire is issued in reels containing about how many feet of wire? (Page 8-6)
1,312
Bobbins holding about how many feet of wire are prepared, normally in rear areas, for use in building short lengths of fence and in repairing entanglements? (Page 8-6)
98
What is the breaking load of barbed steel tape? (Page 8-7)
500 pounds
Barbed tape is issued in how many foot reels? (Page 8-7)
164
What is the most effective fence that can be constructed using barbed tape? (Page 8-8)
Double apron fence
How many pounds does the U-shaped picket weigh? (Page 8-11)
5.5
How much does the barbed wire concertina weigh? (Page 8-14)
55.8 lbs
Barbed tape concertina comes in a diameter of 33 inches and an expanded length of how many feet? (Page 8-14)
50
Every concertina fence is secured firmly to the ground by driving staples at intervals of not more than how many feet? (Page 8-25)
6.6
The trestle apron fence has inclined crosspieces spaced at 15.7 to how many foot intervals to carry longitudinal wires on the enemy side? (Page 8-30)
19.7
Approximately how high should knife rests be? (Page 8-31)
3.3 feet
Immediately after a defensive position is occupied and before an attempt is made to erect protective wire, trip wires should be placed just outside grenade range, usually how many feet? (Page 8-31)
98-131
What should be used where concealment is essential and to prevent the enemy from crawling between fences and in front of emplacements? (Page 8-32)
Tanglefoot
Tanglefoot obstacles should be used in a minimum depth of how many feet? (Page 8-32)
32.8
The length of tactical wire entanglement is how many times the length of the front, times the number of belts, regardless of the size of the unit involved? (Page 8-34)
1.25
Since protective wire encircles each platoon area of a command, the protective-wire entanglement for units is how many times the average platoon frontage, times the number of platoons involved? (Page 8-34)
2.5
