Exam (elaborations)

ARCH373 Design and Engineering of Environmental Systems Exam 2 Study Guide Verified Question and Answer A+ Graded

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Course
ARCH373 (ARCH373)

Institution
Alcorn State University

Four goals of fire protection systems - ANS- Protection of life Protection of building Protection of contents Continuity of operation What event started the development of the NFPA 101 - ANS- The Triangle Shirtwaist Factory fire in 1911 fire trapped women and girls behind doors locked by mana...

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ARCH373 Design and Engineering of Environmental
Systems Exam 2 Study Guide 2024-2025 Verified
Question and Answer A+ Graded

Four goals of fire protection systems - ANS- Protection of life

Protection of building

Protection of contents

Continuity of operation

What event started the development of the NFPA 101 - ANS- The Triangle Shirtwaist Factory fire in
1911

fire trapped women and girls behind doors locked by management to prevent stealing. Many
jumped out windows to escape and 148 people died

What is the difference between thermal and non-thermal products from a fire? - ANS- Thermal=
flame and heat

Non-thermal= smoke and constituent gases

Thermal products are visible and make tactile impressions

Non-thermal pose the greatest threat to human life

What is the fire triangle/tetrahedron - ANS- fuel, oxygen, heat energy, an uninhibited chain reaction

the components it takes to produce a fire. If you take any one of these away, you cannot make a fire

What is compartmentation - ANS- method of fire control

passive system

Each "compartment" of a building is enclosed by fire-rated walls, floors, doors, etc.

one-hour separation is required between occupancies

for a mix of occupancies within the same structure

, What are smoke barriers? - ANS- method of smoke control

passive system

useful in a fire's early stages

confines the initial layer of heated air and smoke produced by a fire

helps slow the spread of smoke while making the early detection and suppression of the fire more
likely

What are dilution systems? - ANS- method of smoke control

active system

during the early stage of fire, dilution of smoke with 100% outdoor air (via HVAC system) may
facilitate evacuation

Beyond sort-term, dilution is rarely sufficient for smoke control

What are exhaust systems? - ANS- method of smoke control

active system

single-purpose smoke exhaust system

they employ both air velocity and air pressure to help control smoke movement

As with dilution systems, high velocities are avoided so that fresh are is not drawn up through the
smoke layer

Such systems are particularly useful in large-volume atrium spaces

requirements for exits and egress systems - ANS- need exit passageways in every building from every
space

more than 50 occupants= 2 or more exits

stairs never less than 44 inches wide

all doors swing in direction of egress

panic hardware often required

Different fire classes - ANS- Class A: can be extinguished with water

Class B: burning gases and liquids can float on water, so it is less effective

Class C: Extinguishing medium must be electrically non-conductive

Class D: combustible metals requires special extinguishers

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