In the illustration shown, the type of...

🔍 Key Concepts

• Compare direction of air and smoke movement in each figure (mostly across the deck vs. mostly up and down). • Know basic definitions: horizontal ventilation moves smoke laterally through openings on the same level; vertical ventilation moves it up or down through decks or topside openings; combination ventilation uses both. • Look for any mechanical exhaust fan or trunk that might be pulling smoke vertically while air enters horizontally.

💭 Think About

• In Figure 1, trace the white and red arrows: Do they show smoke and air only moving along one deck, or do they also pass up or down through another level? • In Figure 2, ask yourself whether the smoke is mainly being drawn across the deck toward an opening on the same level, or if it is also using an opening above/below the fire compartment. • Which option best matches a setup where air is brought in one way and smoke is removed another way (two directions), versus a setup where smoke is mainly swept across on a single level?

✅ Before You Answer

• Identify whether Figure 1 uses both horizontal and vertical paths for smoke removal or just one direction. • Confirm that in Figure 2 the primary exhaust path for smoke is along the same deck level, not up through a higher deck opening. • Eliminate any option that labels a figure as vertical ventilation when the arrows do not clearly show smoke moving primarily through an opening above or below the compartment.

In the illustration shown, the type of ventilation depicted in figure 1 and figure 2 respectfully is __________. See illustration SF-0013.

horizontal; vertical

vertical; combination

combination; horizontal

cross-flow; horizontal

🔍 Key Concepts

💭 Think About

✅ Before You Answer