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Motars Exam Prep > Mortars Exam Prep > Flashcards

Mortars Exam Prep Flashcards

1
Q

The M2 compass primary use?

A

To obtain azimuths and angles of sight.

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2
Q

M2 compass azimuth scale is graduated from?

A

0 to 6400 in 20 mil increments and numbered at every 200 mil intervals.

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3
Q

M2 & M2A2 characteristics

A

Weight without equipment:9 lbs
Weight without equipment less batteries:21lbs
Azimuth rotation: 6400mils
Elevation: (800 mils M2) (1100 mils M2A2)
Depression: 400 mils
Magnification: X4
Field of view. 10 degrees

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4
Q

M2 and M2A2 how many bubbles?

A

Three bubbles. Two tubular, one fish-eyed

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5
Q

M2 and M2A2 main scale.

A

Colored black and numbered at 200 mil intervals.

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6
Q

M2 and M2A2 red scale.

A

Should only be used when verifying the lay of the aiming circle with another aiming Circle.

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7
Q

M2 and M2A2 azimuth micrometer scale is graduated at?

A

1 mil intervals and numbered from 0 to 100 at 10 mil intervals.

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8
Q

M2 and M2A2 the elevation micrometer scale is graduated at?

A

1 mil intervals from 0 to 99 mils– large zero is designated as 0 and 100.

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9
Q

Aiming Circle distance from objects.

A 
High tension power lines and electronic equipment: 150m 
Railroad tracks, trucks and tanks: 75m
Vehicles: 50m
Barbed wire: 30m
Mortars or Telegraph Wire: 25m
Helmets and so forth: 10m
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10
Q

Declination constant

A

The clockwise angle between grid North and magnetic north.

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11
Q

Declination station

A

To determine the declination constants of instruments and to correct for local attractions, annual variations and instrument errors.

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12
Q

When to declinate the aiming Circle

A

When it’s move 25 miles or more from the area in which it was last declinated.
After an electrical storm or after receiving a severe shock such as a drop.
Every 30 days.

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13
Q

M67 unit sight

A

Field of view 10 degrees

Magnification X4

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14
Q

Replacing the m67 sight unit in the carrying case

A

Elevation of 800 Mils and deflection of 3200 Mil. s

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15
Q

The boresight detects?

A

Deflection and elevation errors in the site.

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16
Q

M45 boresight

A

Weight: 2.5
Field of view: 12 degrees
Magnification: X3

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17
Q

M115 boresight

A

Weight: 5 ounces
Field of view: 17 degrees
Magnification: 1.5

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18
Q

Who determines the Azimuth on which the section is to be laid and notifies the platoon sergeant?

A

The FDC

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19
Q

The principle of reciprocal laying is based on the Geometric Theorem that states if two parallel lines are cut by a transversal, the alternate interior angles are…

A

Equal

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20
Q

M224A1 60-mm rate of fire

A

Max 30rpm for 4 minutes

Sustained 20rpm

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21
Q

M224A1 60-mm range

A

70-3490m conventional

70-1340m handheld

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22
Q

M224A1 60-mm weight

A
  1. 1 Conventional

16. 6 handheld

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23
Q

M224A1 60-mm cannon

A

M225A1

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24
Q

M224A1 60-mm bipod

A

M170A1- provides 250mils of Traverse

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25
Q

M224A1 60-mm baseplate

A

M7A1 and M8 handheld

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26
Q

M224A1 60-mm type of fire

A

Drop fire and Trigger fire

27
Q

M224A1 60-mm upper and lower saddles

A

Upper- 0800-1100

Lower- 1101- 1511

28
Q

M224A1 60-mm baseplates

A

M7A1: full rotation of 6400 mils and can be used to fire charge 0 through 4.
M8: 800 mils left and right handheld mode 1600 total
M8A1: full rotation of 6400 mils charge 0 to 1 handheld but is capable of 0 to 4.

29
Q

Three major components to mortar cartridges

A

Fuse, body, and tail fin with propulsion System Assembly.

30
Q

M224A1 60-mm HE mortar

A

M720 range 3490m
M720A1 3490
M888 3520
M768 3490

31
Q

Proximity burst fuze

A

1 to 4 meters above ground

32
Q

NSB

A

0 to 1 meter above ground

33
Q

M734 fuze settings

A 
Impact
NSB 
Proximity
Delayed 1/2 second
No safety pins or wires
34
Q

Point detonating Fuze m935

A

Super quick or delay it has a standard pull wire safety that is removed immediately before firing.

35
Q

M252A1 81mm mortar cannon nomenclature

A

M253 30.5lbs

36
Q

M252A1 81mm mortar mount

A 
M177A1 21.3 lb
100 mils left and right traverse
7 per turn Traverse
0800-1511 elevation
10 mils elevation per turn of handwheel
37
Q

M252A1 81mm mortar baseplate

A

M3A2: 23lbs

38
Q

M252A1 81mm mortar range

A

Max 5608m

Minimum 83m

39
Q

M252A1 81mm mortar rate of fire

A

Max 30rds for 2 minutes

Sustained 15rds

40
Q

M252A1 81mm mortar boresight

A

0 deflection and 0800 elevation no less than 200m away target. Sight unit case 25m away 8.28 circle right outer edge

41
Q

M252A1 81mm mortar ammunition color

A

OD Green: he
White: illumination
Light green: phosphorus

42
Q

M252A1 81mm mortar HE rounds

A

M821/ M821A1 HE range 5608

43
Q

Two methods used to fire the mortar without an FDC.

A

Direct lay and direct alignment

44
Q

Firing on a wide target

A

Traversing fire

45
Q

Firing on deep targets

A

Searching fire

46
Q

Direct lay method

A

Gunnar sees the target through the mortar site

47
Q

Direct alignment method

A

Fo observes the Target near the mortar or the gun target line he observes the fall of rounds mkes Corrections relative to the gun target line and gives gun commands directly to the mortar Squad.

48
Q

Orders are implace by

A

Platoon, section and by Squad.

49
Q

Methods of reconnaissance

A

Map reconnaissance, air reconnaissance and ground reconnaissance

50
Q

Mission accomplishment

A

The most important factor

51
Q

Position selection

A 
Mission accomplishment
 tactical situation
 range
Target area coverage 
survivability 
overhead and mass clearance
 surface conditions
 Communications 
routes.
52
Q

Range considerations

A

One half to two-thirds of their range

53
Q

Types of occupation

A

Deliberate, hasty and emergency.

Deliberate and haste are plan the difference is time. Emergency a call for fire is received while the platoons make and tactical movement

54
Q

Displacement techniques

A

Displacement by platoon by section by squads or section

55
Q

Types of bounding

A

Successive bounding and Alternate bounding

Successive they match up with each other then bound alternate one leaps in front of the other.

56
Q

Mortar formations

A 
Parallel 
lazy w 
diamond 
triangle 
6 mortar star formation
57
Q

120mm mortar cannon

A

M298 110lbs

58
Q

120mm mortar bipod

A

M190 ground-mounted 70lba

M191 ground / carried mounted 68lbs

59
Q

120mm mortar baseplate

A

M9 136lbs

60
Q

120mm mortar range

A

Max 7200 m

Minimum 200

61
Q

120mm mortar rate of fire

A

Maximum 16 first minute

Sustained 4

62
Q

120mm mortar elevation

A

Ground-mounted 0710- 1510
Carrier mounted 0750-1510
5 mils each turn of elevation crank

63
Q

120mm mortar Traverse

A

Right or left from Center 136
With extension 316
One turn of traversing wheel 5 mils

Motars Exam Prep (1 decks)

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