1
Q
Uses of a vent system
A
- Cooling equipment
- CBRN
- Living spaces
- Machinery space cooling
- Galley Ventilation
2
Q
What are the different types of ventilation?
A
- Fan supply & Fan exhaust
- Fan supply & Natural exhaust
- Natural supply & Fan exhaust
- Natural supply & Natural exhaust
3
Q
Describe Fan Supply & Fan exhaust
A
- Sucks air in then out
- used in machinery spaces,galleys,laundries
4
Q
Describe Fan supply & Natural exhaust
A
- Sucks air in then lets its naturally dissipate
- used in store rooms, workshops
5
Q
Describe Natural supply & Fan exhaust
A
- Air drifts in & is drawn out
- Fitted in paint stores & inflam stores
6
Q
Natural supply & Natural exhaust
A
- Air drifts in & out
- Only used in unoccupied compartments
7
Q
What are the 6 common filters for Ventilation?
A
- Panel
- Supply
- Grease
- Lint
- Dust
- Flameproof Gauzes
8
Q
Which spaces require special filters?
A
- Galley
- Store room
- Auxiliary machinery space
- Magazines
- Paint stores
9
Q
Ventilation
What are the special requirements for Sewage treatment spaces?
A
- 15 air changes per hour
10
Q
Ventilation
What are the special requirements for Magazines?
A
100% treated air
11
Q
Ventilation
What are the special requirements for auxiliary machinery spaces?
A
50% of exhaust fans at deck level
12
Q
Which compartments require Fire Flaps
A
- Galleys
- Main machinery spaces
- Magazines
13
Q
What is the basic Air conditioning cycle?
A
- 33% fresh air in
- 67% Recirc
14
Q
When are Citadel tests done?
A
- Anually
- Prior to DED
- During harbour acceptance trails
- During sea acceptance trails
- During FOST
15
Q
What are the steps for citadel testing
A
- Close citadel
- Open AFU inlets & start AFU
- Restrict access
- Serach for leaks, 2 inch vacuum required
- Record results
16
Q
What is a Crash stop?
A
- Stops all fans in case of emergency, to stop smoke spreading through ship
- Crash stop is in the SCC
Theory 4 Refrigeration
flashcards
Decks in class (5)
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