M240 Operation And Maintenance

Question 1

Chamber pressure for m240 series machine guns

Answer 1

52,940 psi

Question 2

Muzzle velocity for m240b

Answer 2

2,750fps

Question 3

Cycle of ops for m240

Answer 3

Feeding, chambering, locking, firing, unlocking, extracting, cocking

Question 4

Definition of Maintenance function inspect

Answer 4

Inspect all assemblies for missing, broken, or loose parts. Inspect parts for cracks, dents, burrs, excessive wear, rust, or corrosion.

Question 5

How often must al small arms be inspected and or engaged for active duty weapons?

Answer 5

At least annually for safety and servicability.

Question 6

You inspect all assemblies for?

Answer 6

Missing, broken or loose parts

Question 7

You inspect all parts for?

Answer 7

Cracks, dents, burrs, excessive wear, rust, corrosion

Question 8

Make sure all parts are?

Answer 8

Cleaned and lubricated

Question 9

Theory of operation that apply to all m240 series machine guns

Answer 9

Gas operated
Fires from open bolt position
Has positive locking of the bolt

Question 10

__ and __ must must accompany the receiver when your m240 must be turned in to direct support maintenance

Answer 10

Both barrels and bolt assembly

Question 11

Weight of m240b with barrel

Answer 11

27lbs 4oz

Question 12

Weight of m240 with barrel

Answer 12

22lbs 3oz

Question 13

Rapid rate

Answer 13

200rds/min 2-3sec in between bursts

Question 14

Sustained rate

Answer 14

100rds/min 4-5sec in between bursts

Question 15

Cyclic rate m240b

Answer 15

650rds/min

Question 16

Cyclic rate m240

Answer 16

650-950rds/min

Question 17

Theory of operation specific to m240b

Answer 17

Mounted on tripod(m122a1/m192)
Ground supported with integral bipod
Has front and rear sights
Optical accessory top cover and forward rail

Question 18

Theory of operation specific to m240

Answer 18

Fires parallel to the turret main gun
No sights on machine gun
Fired manually or electronically
Fired manually from turret ring mount

Question 19

8 major components of the m240 mg

Answer 19

Barrel assembly,
buffer assembly, 
receiver assembly, 
trigger housing assembly, 
driving spring rod assembly, 
cover assembly, feed tray,
Bolt and operating rod assembly

Question 20

What should you always keep in mind during unit level pmcs

Answer 20

Warnings and cautions

Question 21

____ provides energy for returning bolt and operating rod assembly to the firing position

Answer 21

Driving spring rod assembly