COMBAT EDGE

Question 1

What the difference between the MBU-20/P and the MBU-20A/P

Answer 1

The MBU-20A/P dosent have the COMBAT EDGE bladder so the breathing hose is different

Question 2

WHat is the difference between the HGU-55/P MBU-12/P visor and the visor used with the COMBAT EDGE ensemble

Answer 2

COMBAT EDGE visors have to be fitted to the mask

Question 3

What is the purpose of the CRU-94/P ITB

Answer 3

its the central interface for the upper and lower breathing gas hoses, vest hoses, and emergency oxygen hoses. it also has a pressure relief valve that provides system over pressure protection if the vest is not worn or has been inadvertently disconnected. and provides a man/ aircraft interface separation point during egress

Question 4

What is the max pressure that the pressure relief valve on the CRU-122/P allows to the pilots mask

Answer 4

80 mm HG

Question 5

What might an aircrew member have to do it the helmet is too tight after the helmet is properly configured

Answer 5

get a bigger helmet

Question 6

How do you position a properly adjusted helmet modification for COMBAT EDGE on the wearers head

Answer 6

edgeroll 1 3/4 - 2 in from the eyes center position

Question 7

What does PBG pressure check compensate for

Answer 7

physiological effects of flying

Question 8

During PBG pressure checks, how do you take an accurate reading from the OUTPUT PRESSURE gauge

Answer 8

hold breath with mouth closed

Question 9

What is the max duration to which an aircrew may be exposed to 32 inches Wg pressure during PBG checks

Answer 9

60 sec

Question 10

What indicator signifies properly fitted COMBAT EDGE equipment when the PRE FLIGHT PRESS TO TEST valve button is depressed

Answer 10

leak flow is green

Question 11

What are the types of inspection on COMBAT EDGE equipment

Answer 11

prior to issue, pre/post flight, and periodic (30 days)

Question 12

What may happen if you interchange parts between connectors

Answer 12

may cause it to fail

Question 13

How to you clean the MBU-20/P inhalation and exhalation valves

Answer 13

70% alcohol

Question 14

What do you set the tension gun to for the upper and lower hose tie down straps

Answer 14

8

Question 15

Why does the HGU-55 series helmet need to be modified when it is used with COMBAT EDGE equipment

Answer 15

to provide for automatic mask tensioning

Question 16

What CRU regulated connector do your perform a flow test and an altitude pressure breathing test on

Answer 16

120/P

Question 17

What is the max altitude that the CRU-122/P regulated ITB can be used

Answer 17

60,000 ft

Question 18

How far above the chin strap do you position the lower front rivet of the bayonet receiver for it to be properly located on the HGU-55/P

Answer 18

1 in

Question 19

What is the max you can trim the MBU-20 face piece for comfort

Answer 19

.5 in

Question 20

During COMBAT EDGE equipment pressure check, what is the max number of breaths a aircrew member may take at pressures below 34 in of water gauge

Answer 20

5

Question 21

how many in of water gauge should the OUTPUT PRESSURE gauge read during a COMBAT EDGE equipment pressure check

Answer 21

32+-2

Question 22

How many inches should the 100lb parachute cord be when replaced inside the ITB

Answer 22

24

Question 23

How many seconds min should the inhalation and exhalation valves be swished in alcohol

Answer 23

10

Question 24

Whats the torque value on the MBU-20/P mask’s mic

Answer 24

15+-1 in oz