Ventilation

Question 1

What are the uses of Ventilation?

There are 5 uses in total

Answer 1

-Cooling of electronic equipment
-CBRN
-Habitability
-Main Machinery Space Cooling
-Galley Ventilation

Question 2

What are the different configurations of Ventilation?

There are 4 different configurations

Answer 2

-Fan Supply and Fan Exhaust
-Fan Supply and Natural Exhaust
-Natural Supply and Fan Exhaust
-Natural Supply and Natural Exhaust

Question 3

Where is Fan Supply and Fan Exhaust fitted and why is it fitted there?

Answer 3

Where: Machinery Spaces, Galley, Laundries, WCs and Bathrooms

Why: Fitted when necessary to remove large quantities of Wild Heat, Moisture or Noxious Fumes as well as providing Fresh Air to the the personnel in the compartment

Question 4

Where is Fan Supply and Natural Exhaust fitted and why is it fitted there?

Answer 4

Where: Store Rooms and Workshops

Why: Fitted when supply of fresh air to the compartment is the primary objective

Question 5

Where is Natural Supply and Fan Exhaust fitted and why is it fitted there?

Answer 5

Where: Paint Stores, Spirit Rooms, Inflam Stores

Why: Fitted when the removal of Noxious Gases and Flammable Vapours is the primary objective

Question 6

Where is Natural Supply and Natural Exhaust fitted?

Answer 6

Where: Minor Unoccupied Compartments and Lobbies

Question 7

Name the differnt types of common filters

There are 6 types of common filters

Answer 7

-Panel Filter
-Supply Filters
-Grease Filters
-Lint Filters
-Dust Filters
-Flameproof Gauzes

Question 8

Describe the Panel Filter

Answer 8

Re-Circulating trunking associated with air conditioning systems

Question 9

Describe the Supply Filters

Answer 9

Polyurethane filters fitted in ATUs between the plenum chamber and the cooler

Question 10

Describe the Grease Filters

Answer 10

Fitted to exhaust canopies over deep fat fryers and ranges in the galley

Question 11

Describe the Lint Filters

Answer 11

Fitted to prevent the accumulation of fluff and fibres in the exhaust trunking of the laundry

Question 12

Describe the Dust Filters

Answer 12

Fitted to computer and sonar instrument spaces and sick bays

Question 13

Describe the Flameproof Gauzes

Answer 13

Fitted to Inflam Stores, Paint Lockers, Hangers, Vehicle Decks and Magazines

Question 14

What areas have Special Ventilation Requirements?

There are 5 areas

Answer 14

-Galleys
-Store Rooms
-Auxiliary Machinery Spaces
-Sewage Treatment Spaces
-Magazines

Question 15

Why do Galleys have Special Ventilation Requirements?

Answer 15

Fire Flaps are fitted to their trunking due to the risk of fires from deep fat fryers

Question 16

Why do Store Rooms have Special Ventilation Requirements?

Answer 16

They are subject to the build up of toxic fumes (CO2), which is heavier than air

Question 17

Why do Auxiliary Machinery Spaces have Special Ventilation Requirements?

Answer 17

To prevent any build up of gas, 50% of exhaust terminals will be found at deck level

Question 18

Why do Sewage Treatment Spaces have Special Ventilation Requirements?

Answer 18

These spaces require 15 air changes per hour with a seperate exhaust system, and a slight excess of exhaust capacity from the supply

Question 19

Why do Magazines have Special Ventilation Conditions?

Answer 19

They are fitted with their own air conditioning system, which allows for 100% treated fresh air

Question 20

What does ATU stand for?

Answer 20

Air Treatment Unit

Question 21

What does AFU stand for?

Answer 21

Air Filtration Unit

Question 22

When are AFUs used?

Answer 22

They are used in a CBRNDC State 1 environment, Condition Zulu Alpha

Question 23

What sections do AFUs consist of?

There are 3 sections

Answer 23

-Pre-Particulate Filter
-Particulate Filter
-Gas Filter

Question 24

Describe the Pre-Particulate fiter

Answer 24

A paper filter which removes coarse particle matter, including radio-active fall-out

Question 25

Describe the Particulate filter

Answer 25

Made of glass fibre; designed to remove paticulate such as bacteria by entrapment

Question 26

Describe the Gas Filter

Answer 26

Designed to remove all known chemical warfare agents in the form of gases or vapours from the airstream by absorption in the activated charcoal filling

Question 27

When are Citadel tests carried out?

There are 5 occasions

Answer 27

-Annually
-Prior to DED (Docking Extended Duration)
-During HATs (Harbour Acceptance Trials)
-During SATs (Sea Acceptance Trials)
-During FOST Work-Up

Question 28

What does a Citadel need to be sealed to?

Answer 28

A pressure of 2” WG

Question 29

What is a Crash Stop?

Answer 29

A Crash Stop facility is built into the ventilation system to allow all fans to be stopped in case of an emergency

Question 30

What do you need to check before Restarting a Vent System?

Answer 30

The Vent Intakes must be checked to see if they are clear of Smoke, Welding Fumes and Debris