Tables and sketchs

Question 1

The following picture shows what 2 types of thread?

Select one:

a. NPT / NPT
b. JIC / Swivel
c. NPT / JIC
d. JIC / JIC

Answer 1

C

Question 2

The correct valve sequence to pressurise the medical Lock is:-

a. Valve A open, Valve C open, door closed and clamped, open Valve B, engage interlock
b. Valve A closed, Valve C closed, door closed, open Valve B
c. Valve A open, Valve C open, door closed and clamped, open Valve A, engage interlock
d. Door closed and clamped, valve C closes, open Valve A, open valve B, engage interlock

Answer 2

D

Question 3

The correct way to operate the toilet system shown in the following diagram is:

a. Toilet lid closed & interlock engaged, open Valve D, open Valve C, Open Valve B, close Valve B, close Valve C & D, open Valve A, Close Valve A, open Valve B, open Valve C, open Valve D, Close Valve B, C & D
b. Open Valve A, open Valve B, open Valve C, open Valve D, close all Valves
c. Valve C & D always open, open Valve A, open Valve B, Close Valve A & B
d. Toilet lid closed & interlock engage, open vale D, open valve B, Close Valve B, open Valve A, close Valve A, open B, C & D, close B, C & D.

Answer 3

A

Question 4

Which is the correct operating procedure for taking the medical lock to the surface, shown below (valves are
shown closed)?

a) Open A, close C, open B
b) Open C, close A, open B
c) Open B, close C, open A
d) Open B, open C, close A

Answer 4

A

Question 5

Using the USN Rev7 excursion tables.

After decompression from 1,000 fsw to 400 fsw, the maximum downward excursion is…

a. 105fsw
b. 505fsw
c. 1000fsw
d. 307fsw

Answer 5

a. 105fsw

PS: Attention, is asking the maximum excursion, if the question asks maximum depth so the answer would be ‘‘b. 505’’

Question 6

After decompression from 1,000 fsw to 400 fsw. The divers have elapse for 48 hours at 400 fsw. What is the full upward excursion allowed and maximum shallow depth can be attained by the diver?

a. 105ft and 295fsw
b. 93ft and 307fsw
c. 1000ft and 850fsw
d. Diver can move freelly upwards

Answer 6

b

Question 7

The DDC is at 400 fsw, if one diver had reached a depth of 460 fsw during an in-water excursion. What is the maximum upward excursion depth for the divers?

a. 307fsw
b. 100fsw
c. 360fsw
d. 93fsw

Answer 7

c. 360fsw

Question 8

Decompression from a 1,000 fsw dive has been conducted to the 400 fsw depth.

Twenty-four hours have been spent at 400 fsw. The dive log shows that the deepest depth attained in the preceding 48 hours is 496 fsw. What is the maximum upward excursion depth the diver can attain?

a. 496fsw
b. 396fsw
c. 307fsw
d. 500fsw

Answer 8

396 fsw

The maximum upward excursion from based on a 496 fsw depth, is to 396 fsw (500 – 104) allowing a maximum of a 4 fsw upward excursion.