MK20

Question 1

What is the max working depth of MK20 in surface supplied mode?

SCUBA mode?

Answer 1

60 fsw

190 few

Question 2

What is the difference between the MK20 MOD 0, and MOD 1

Answer 2

MOD 0 has positive pressure (lever on regulator) and is preferred in enclosed space/contaminated water. MOD 1 is preferred in SCUBA mode.

Question 3

At what pressure does the MOD 0 fill the FFM?

Answer 3

0.3 PSI

Question 4

What are the min, desired and max over bottom pressures for the MK 20?

Answer 4

MIN 90
DESIRED 135
MAX 135

Question 5

How do you calculate MMP for MK20?

Answer 5

Bottom Pressure + Overbottom Pressure = MMP

(depth x 0.445) + *135 = MMP

Question 6

Air supply system must be able to provide an average flow of ____ acfm to divers

Answer 6

1.4 acfm

Question 7

air consumption for the MK20 varies between what?

MK 20 free flow mode flow:

Answer 7

0. 75 and 1.5 acfm

8. 0 acfm

Question 8

What are the specs for navy diving umbilicals:

• max length:
• breathing gas hose:
• pneumofathometer:

Answer 8

• max length: 600 ft
• breathing gas hose: 3/8”
• pneumofathometer: 1/4”

Question 9

adequately charged SCUBA cylinder is defined as the pressure that provides sufficient air to:

Answer 9

1st DECOMP stop, or:

surface (if no-D dive)

Question 10

EGS SCUBA regulator over-bottom pressure must not be lower than ____

Answer 10

135 PSI

Question 11

When must mission maintenance be performed?

Answer 11

After a 7 or more day break during missions
every 30 days during missions
at the end of a mission

New equipment (never been used)
equipment that has been idle for 18 months
equipment that is suspect

Question 12

Above what current must extra weight be used when using MK20?

Answer 12

1.5 knots