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Mech Theory 4 > Ventilation > Flashcards

Ventilation Flashcards

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1
Q

What are the uses of Ventilation?

There are 5 uses in total

A

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

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2
Q

What are the different configurations of Ventilation?

There are 4 different configurations

A

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

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3
Q

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

A

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

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4
Q

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

A

Where: Store Rooms and Workshops

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

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5
Q

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

A

Where: Paint Stores, Spirit Rooms, Inflam Stores

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

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6
Q

Where is Natural Supply and Natural Exhaust fitted?

A

Where: Minor Unoccupied Compartments and Lobbies

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7
Q

Name the differnt types of common filters

There are 6 types of common filters

A

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

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8
Q

Describe the Panel Filter

A

Re-Circulating trunking associated with air conditioning systems

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9
Q

Describe the Supply Filters

A

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

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10
Q

Describe the Grease Filters

A

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

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11
Q

Describe the Lint Filters

A

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

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12
Q

Describe the Dust Filters

A

Fitted to computer and sonar instrument spaces and sick bays

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13
Q

Describe the Flameproof Gauzes

A

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

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14
Q

What areas have Special Ventilation Requirements?

There are 5 areas

A

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

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15
Q

Why do Galleys have Special Ventilation Requirements?

A

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

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16
Q

Why do Store Rooms have Special Ventilation Requirements?

A

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

17
Q

Why do Auxiliary Machinery Spaces have Special Ventilation Requirements?

A

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

18
Q

Why do Sewage Treatment Spaces have Special Ventilation Requirements?

A

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

19
Q

Why do Magazines have Special Ventilation Conditions?

A

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

20
Q

What does ATU stand for?

A

Air Treatment Unit

21
Q

What does AFU stand for?

A

Air Filtration Unit

22
Q

When are AFUs used?

A

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

23
Q

What sections do AFUs consist of?

There are 3 sections

A

-Pre-Particulate Filter
-Particulate Filter
-Gas Filter

24
Q

Describe the Pre-Particulate fiter

A

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

25
Q

Describe the Particulate filter

A

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

26
Q

Describe the Gas Filter

A

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

27
Q

When are Citadel tests carried out?

There are 5 occasions

A

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

28
Q

What does a Citadel need to be sealed to?

A

A pressure of 2” WG

29
Q

What is a Crash Stop?

A

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

30
Q

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

A

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

Mech Theory 4 (4 decks)

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