MG

Question 1

Define burst of fire

Answer 1

The number of successive rounds fired with the same elevation and point of aim when the trigger is held to the rear

Question 2

Define max ordinance

Answer 2

Highest point round reaches, 2/3 of way to target

Question 3

Come of fire

Answer 3

Pattern of rounds

Effects
-vibration, ammo, atmospheric conditions

Question 4

Beaten zone

Answer 4

Elliptical pattern on ground/target by striking of rounds

• oval/cigar shape
• density decreases towards edges
• 85%

Question 5

Characteristics of beaten zone

Answer 5

500m - 1x110m
1000m - 2x75m
1500m - 3x55m
2000m - 4x50m

Question 6

Danger space

Answer 6

Distance between muzzle to target

• trajectory rises less than 1.8m (average height) above ground, including beaten zone

Question 7

Classes of machine gun fire

Answer 7

1. Respect to ground
2. Respect to target
3. Respect to gun

Question 8

Respect to ground

Answer 8

Grazing fire: cone of fire 1m off ground, 600m

Plunging fire: danger space is within beaten zone
- loss of grazing fife at any point of trajectory

Question 9

Respect to target

Answer 9

1. Frontal: long axis beaten zone @ right angle
2. Flanking: side of target
3. Oblique: longer axis at angle other than right angle (diagonal)
4. Enfilade:when the long axis of the beaten zone coincide or nearly coincide with the long axis of the target

Question 10

Respect to weapon (6)

Answer 10

1. Fixed: delivered against stationary target
   - width/depth of beaten zone cover target
2. Traversing: width by successive direction
3. Search: successive changes in elevation
4. Searching/traversing: successive change in direction/depth
5. Swinging traverse: major change in direction, little to no change in elevation
6. Free gun: major change in direction/elevation

Question 11

Rates of fire

Answer 11

1. Sustained: normal rate of fire
2. Rapid: high volume
3. Cyclic: most ammo in 1 min
   - trigger held to rear

Question 12

Sustained 240

Answer 12

100 RPM
6-9 Rds
10 min barrel

Question 13

Rapid 240

Answer 13

200 rpm
10-13 rds
2 min barrel

Question 14

Cyclic 240

Answer 14

650-950 rpm

1 min barrel

Question 15

240 
- Max range
- point tgt
- area tgt
Tracer burnout
Grazing fire

Answer 15

• 3725m
• 800m
• 1100m
• 900m
• 600m

Question 16

Predetermined MG fire

Answer 16

Organizes battlefield for PLT/gunner

• sector, final protective fires, FPL, PDF, grazing fire, dead space, primary/secondary sector

Question 17

Fire control

Answer 17

Verbal, H+A signals, prearranged signals, personal contact, range card, Sop

Question 18

Fire commands (4)

Answer 18

Initial
Subsequent
Doubtful elements/corrections
Abbreviated fire commands

Question 19

Initial fire commands

Answer 19

Alert
Direction
Description
Range

Question 20

Subsequent

Answer 20

Adjustments
Direction/elevation
ROF
Fire command
Termination

Question 21

Doubtful elements/correction

Answer 21

Correction of error

Question 22

Mk19

Answer 22

Max: 2212m
Point: 1500m
Area: 2212m

Sustained: 40 RPM
Rapid: 60 RPM
Cyclic: 325-375 RPM

• HEDP 15m casualty
  140. 6 lbs

Question 23

M2

Answer 23

Max: 6764m
Point:1500m
Area: 1830m
Grazing: 700m

Sustained: 40 RPM, 6/9 rds
Cyclic: 450-550 RPM

Question 24

M249

Answer 24

Max: 3600m

Point(bi)600m
Area (bi) 800m

Point (tri) 800m
Area (tri) 1000m

Grazing: 600m

Sustained: 50 rpm, 6/9 rds
Rapid: 100 rpm, 6/9 rds
Cyclic: 850 RPM