Ventilation

Question 1

Stairshafts in high rise buildings constructed after ___ are required to employ a stairshaft ventilation system.

Answer 1

1974

Question 2

Fan must provide not less than ____ while maintaining a positive pressure of not over ___ on interior doors

Answer 2

50 cubic feet per minute / 25 lbs

Question 3

Pre-60 has _____ windows

Answer 3

openable

Question 4

Post-60 has ___

Answer 4

tempered glass on at least two sides of the building

Question 5

Post-60 Tempered glass location

Answer 5

at corners, and at 50 foot intervals or less

Question 6

Post-74 has ____

Answer 6

tempered glass on four sides of the building

Question 7

Post 74 Tempered glass location

Answer 7

at corners and at 50 foot intervals or less

Question 8

Tempered glass windows are identified by ___

Answer 8

3 inch luminous or reflective decals in a lower corner which indicated for For FD use

Question 9

Post 1996 “Uniform building code”

Answer 9

Requirement of smoke control systems in high rise buildings eliminated the requirement of installation of tempered glass

Question 10

Prior to breaking windows….

Answer 10

radio notification shall be made indication the need and intention to break glass and the specific side of the building

Question 11

Natural air flow within building stairshafts is virtually static in buildings up to ___

Answer 11

25 stories

Question 12

Buildings over 25 stories will naturally flow

Answer 12

minimal amounts of air in an upward direction

Question 13

Natural vertical air currents of ____, can be created by simply opening a door at the bottom and roof levels of a stair shaft

Answer 13

3 to 6 mph

Question 14

High rise buildings constructed after ____ are required to employ an _____

Answer 14

1974 / emergency smoke control system

Question 15

3 components of an emergency smoke control system

Answer 15

Pressurized stairshaft, mechanical smoke removal system, tempered glass or openable windows

Question 16

Positive pressure ventilation using blowers should be placed

Answer 16

4 to 6 feet back from doorway and angled back at least 5 degrees

Question 17

Placing fans in a ___ shape is more effective than placing them in series

Answer 17

V shape

Question 18

Cross ventilation operations are effective up to

Answer 18

25 floors

Question 19

Additionally the pressure generated by a fire (_____) will force smoke through these openings and may contaminate other floors or stairshafts within the building.

Answer 19

up to three times atmospheric pressure

Question 20

Windows:

Post –1960 – Tempered glass on at least ____ of the building. (At corners, and at 50-foot intervals or less.)

Answer 20

two sides

Question 21

Windows:

Post-1974 – Tempered glass on ____ of the building. (At corners, and at 50-foot intervals or less.)

Answer 21

four sides

Question 22

Tempered glass windows are identified by ____ luminous or reflective decals in a lower corner which indicate they are “_____ .”

Answer 22

3-inch / For Fire Department Use

Question 23

___ – Requirement of _____ (Uniform Building Code) in high rise buildings has eliminated the requirement of the installation of tempered glass.

Answer 23

Post 1996 / Smoke Control Systems

Question 24

However, the natural air flow within building stairshafts is virtually static in buildings up to ____. Buildings over ____ will naturally flow minimal amounts of air in an upward direction.

Answer 24

25 stories

Question 25

Therefore, when required, ventilation efforts directed at removing contaminants in these stairshafts must be augmented by ____ means other than utilizing natural air flow only.

Answer 25

mechanical

Question 26

Natural vertical air currents of ___, that flow upward in stairshafts, can be created by simply opening a door at the bottom and roof levels of a stairshaft.

Answer 26

three to six mph

Question 27

Water turbine blowers produce significantly less noise and will provide more than_____ that a like-sized gasoline powered blower. Water turbine blowers can be requested through MFC.

Answer 27

twice the cubic feet of air per minute

Question 28

Portable blowers should be placed _____ from the doorway and angled back at least ___. This maximizes the flow through the fan shroud and air entrainment around the fan shroud as it reaches the door. Placing fans in a _____ than placing them is series.

Answer 28

4 feet to 6 feet back / 5 degrees / V-shape is more effective

Question 29

The preceding cross ventilation operations are effective up to ___ in a high-rise building.

Answer 29

25 floors

Question 30

If it is necessary to cross ventilate floors above the ___, it may be necessary to utilize an ____ in the pressurized stairshaft to supply additional pressurized air to the floor to be ventilated

Answer 30

25th floor / additional blower