6-47.
You should make sure that the primer buttons
of electrically primed ammunition do NOT
contact your body to prevent which of the
following potential hazards?
1.
An electrical shock
2.
An explosion from static electricity
3.
A skin rash
4.
A skin burn
6-48.
An M61A1 gun can fire M50 series am-
munition at what prescribed rate?
1.
4,000 to 7,200 rpm
2.
4,000 to 6,000 rpm
3.
2,000 to 6,000 rpm
4.
2,000 to 4,000 rpm
6-49.
On an M61A1 gun, the gripping surface
needed for easy installation and removal of the
barrels from the rotor is provided by what
device(s)?
1.
A locking pin
2.
A recoil adapter
3.
A guide bar
4.
Knurled bands
6-50.
On an M61A1 gun, the bearing retainers can be
mounted to the housing in increments of what
prescribed number of degrees?
1.
90º
2.
60º
3.
45º
4.
15º
6-51.
On an M61A1 gun, what component picks up a
round as it enters the gun?
1.
The clearing sector assembly
2.
The guide bar
3.
The breech-bolt assembly
4.
The firing contact assembly
6-52.
On an M61A1 gun, a total of how many sets of
rotor tracks is attached to the ribs along the
rotor body?
1.
6 sets
2.
2 sets
3.
12 sets
4.
4 sets
6-53.
On an M61A1 gun, the indexing pin is in what
location?
1.
The housing assembly
2.
The rotor assembly
3.
The clearing solenoid
4.
The breech-bolt
6-54.
On an M61A1 gun, a full firing cycle requires
what prescribed number of actions?
1.
Seven
2.
Six
3.
Five
4.
Four
6-55.
On an M61A1 gun, what total number of steel
ball bearing is contained in the entrance cover?
1.
525
2.
252
3.
230
4.
150
6-56.
On an M61A1 gun, what means is used to
index the drum for installation of the entrance
unit?
1.
A scoop disk
2.
An extractor lip
3.
A timing pin
4.
A chute
6-57.
A total of how many sets of sprocket spur gears
are on each scoop disk of an M61A1 gun?
1.
One
2.
Two
3.
Six
4.
Four
6-58.
On an M61A1 gun, the spur gears is located
what prescribed number of degrees apart?
1.
45°
2.
90°
3.
180°
4.
360°
6-59.
On an M61A1 gun, the transfer unit receives
expended cases and unfired rounds from what
component(s)?
1.
The breech bolts
2.
The exit unit
3.
The entrance unit
4.
The scoop disk
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