Chpt 4

Question 1

Stairs that are not part of the means of egress are often referred to as

Answer 1

Convenience stairs

Question 2

In buildings four or more stories in height, ____ is generally required to extend to the roof unless the slope of the roof is especially steep

Answer 2

One stairway

Question 3

A key component is the step itself, which consists of the tread and the riser, commonly referred to as the

Answer 3

Run and rise

Question 4

Extend in a straight line for their entire length

Answer 4

Straight run stairs

Question 5

Have an intermediate landing between floors and reverse direction at that point.

Answer 5

Return stairs

Question 6

Are two separate sets of stairs constructed in a common shaft

Answer 6

Scissor stairs

Question 7

This type of stair design is common in modern construction

Answer 7

Return stairs

Question 8

Are often found as grand stairs or convenience stairs serving two levels

Answer 8

Circular stairs

Question 9

Are typically found in dwellings where they are used to provide access to an attic space that does not have permanent access stair.

Answer 9

Folding stairs

Question 10

Consist of a series of steps spiraling around a single column

Answer 10

Spiral stairs

Question 11

Because protecting the stairwell from the products of combustion is extremely important, building codes require a high level of protection for most stairs used as a

Answer 11

Means of egress

Question 12

Generally, ____ are required to be separated from the rest of the building

Answer 12

Stair enclosures

Question 13

As defined by codes, ____ are exterior to a building and are open to the air.

Answer 13

Exterior stairs

Question 14

Are open metal stairs and landings attached to the outside of a building

Answer 14

Fire escapes

Question 15

Are usually anchored to the building and are not supported at ground level

Answer 15

Fire escapes

Question 16

Building codes have traditionally required a minimum of one _____ for stairs serving buildings five stories or higher, and more recently, stairs serving floor levels more than 30 feet below the level of exit discharge.

Answer 16

Smoke proof enclosure

Question 17

Stair enclosures may be classified as ____ using either active or passive smoke control.

Answer 17

Smokeproof

Question 18

Typically, _____ are on the exterior perimeter of the building and are entered through ventilated vestibules or open balconies

Answer 18

Smokeproof stair enclosures

Question 19

A common alternative approach over the past 25 years to provide a smokeproof enclosure is to pressurize stairwells when the building is in

Answer 19

Fire mode

Question 20

Activated by automatic fire smoke detection equipment, a dedicated mechanical air handling system is designed to keep smoke out of the stair enclosure by

Answer 20

Pressurizing the shaft

Question 21

Is a hoisting and lowering mechanism equipped with a car or platform that moves in guide rails and serves two or more levels or landings

Answer 21

Elevator

Question 22

Is another term used to describe elevators and often defines as a passenger elevator that has been designed to carry freight

Answer 22

Service elevator

Question 23

Electric elevators are subdivided into either

Answer 23

Drum or traction devices

Question 24

Older style elevators employ a drum on which the hoisting cable is wound

Answer 24

Drum elevators

Question 25

The most common type of elevator in buildings over six stories is the traction elevator because it is very fast and does not have the height limitations of either hydraulic or drum type elevators

Answer 25

Traction elevators

Question 26

Is an electric switch designed to stop the car by removing power before it reaches the upper or lower limits of the hoistway

Answer 26

Terminal device

Question 27

Are large springs or hydraulic cylinders and pistons located at the bottom of the pit that act as shock absorbers should the terminal switch fail.

Answer 27

Buffers

Question 28

Buffers cannot safely stop a free falling car. They can only stop one traveling at its

Answer 28

Normal rate of speed

Question 29

Is also known as the speed governor. This switch slows the drive motor when an elevator starts to exceed a safe speed. If the car continues to accelerate, it applies the car safeties and trips the over speed switch.

Answer 29

Speed reducing switch

Question 30

Is also connected to the speed governor. This switch is activated of the speed reducing switch fails to slow the car sufficiently.

Answer 30

Over speed switch

Question 31

Are tapered sets of steel jaws that wedge against the guide rails and bring the elevator to a stop.

Answer 31

Car safeties

Question 32

Elevator safeties are designed to stop a

Answer 32

Free falling car

Question 33

An ____ is the vertical shaft in which the elevator car travels and includes the elevator pit .

Answer 33

Elevator hoistways

Question 34

Elevator hoistway enclosures usually are required to be a fire rated assembly with a _____

Answer 34

1 to 2 hour rating

Question 35

Penetrations through the hoistway walls are protected by the installation of an appropriately rated assembly such as a listed and labeled

Answer 35

Door and frame

Question 36

present a potential for acting as a vertical chimney to spread fire and smoke throughout a building

Answer 36

Hoistways

Question 37

To prevent mushrooming, building codes require venting at the ____ of practically every hoistway built today

Answer 37

Top

Question 38

Single elevator hoistways that only serves upper levels have____ for rescue purposes every three floors or so in that portion without normal hoistways doors

Answer 38

Access doors

Question 39

In very tall buildings, elevators are divided into zones, with one zone serving the lower floors and another zone serving upper floors. A zone usually serves

Answer 39

15 to 20 floors

Question 40

Are used for express elevators that serve the upper elevators zones in tall buildings

Answer 40

Blind hoistways

Question 41

Passenger elevator car doors are powered by an electric motor mounted on the

Answer 41

Top of the elevator car

Question 42

On hydraulic elevators a top exit may or not be provided depending on whether the system is equipped with a

Answer 42

Manual Lowering valve

Question 43

A ___ is provided on all electric traction elevators

Answer 43

Top exit

Question 44

In multiple elevator hoistways, most elevator cars are equipped with _____to allow passengers to be transferred and laterally from a stalled car to a functioning car next to it

Answer 44

Side exits

Question 45

Commonly called escalators, are stairways with electrically powered steps that move continuously in One Direction

Answer 45

Moving stairs

Question 46

Vertical opening protection also can be provided by a ____at the top of the escalator

Answer 46

Rolling shutter

Question 47

The most common method to protecting the vertical opening is to use closely spaced ______ around the opening

Answer 47

Sprinklers in conjunction with draft stops

Question 48

Are similar to escalators but are only used to move people horizontally or a slight inclines

Answer 48

Moving walkways

Question 49

Are often found in airports to move occupants long distances between the main terminal and remote concourses

Answer 49

Moving walkways

Question 50

Is typically found in manufacturing or storage occupancies and is used to transport items and materials

Answer 50

Conveyor system

Question 51

A primary concern for conveyor penetrations during a fire is incomplete

Answer 51

Door or shutter closure

Question 52

Also include stairways and elevator and dumbwaiter hoistways

Answer 52

Vertical shafts

Question 53

Is a term generally applied to the vertical pathway in a building that contains utility services

Answer 53

Utility chase

Question 54

It is usually not practical to provide any horizontal fire barrier along the length of the

Answer 54

Shaft

Question 55

Is a type of utility cheese used to contain piping needed for building services such as hot and cold potable water, drain lines, steam, hot and chilled water for heating and air-conditioning, and sprinkler piping

Answer 55

Pipe chase

Question 56

Provides for the removal of trash and garbage from upper floor of building such as residential properties

Answer 56

Refuse chute

Question 57

Refuse chutes are required to be constructed of

Answer 57

Non combustible material with rated doors

Question 58

A fire in a properly designed, installed, and maintained Refuse or laundry chute should be contained within the

Answer 58

Chute

Question 59

Is installed as part of an exhaust system for commercial cooking appliances that produce grease laden vapors

Answer 59

Grease duct

Question 60

Typically, ____ are installed over deep fat fryers and grills

Answer 60

Grease ducts

Question 61

Are provided in building primarily to maintain a comfortable environment for occupants

Answer 61

HVAC systems

Question 62

Systems that make use of water as the heat transfer medium are known as

Answer 62

Hydronic systems

Question 63

However, many HVAC systems involve the distribution of conditioned air through a building from one or more mechanical equipment rooms. Such systems are generally known as

Answer 63

Forced air systems

Question 64

Is the air distribution component of the HVAC system

Answer 64

Air ducts

Question 65

Sometimes _____ the space between a suspended ceiling and the roof deck are used as a return air plenum

Answer 65

Interstitial spaces

Question 66

Experienced firefighters know that when a fire occurs in any building, fire control and occupant safety are in enhanced by

Answer 66

Venting the products of combustion to the outside by the shortest route

Question 67

Means the use of mechanical equipment to produce pressure differences across smoke barriers to inhibit smoke movement

Answer 67

Smoke control

Question 68

Automatic transfer of an hvac system to ____ can be accomplished by smoke detectors serving the various floors of the building

Answer 68

Fire operation

Question 69

Automatic initiation of _____ in an hvac system must always take priority over the normal system functions

Answer 69

Fire operation

Question 70

When a system has both a manual and automatic capability, the ____ shall take priority over the automatic control

Answer 70

Manual

Question 71

A ____ is a type of smokeproof enclosure that makes use of a vestibule between the corridor and the stairwell that is open to the atmosphere

Answer 71

Smokeproof tower

Question 72

Utilizes a blower or fan to provide a slightly greater pressure in the stairwell then the Corridor to prevent the infiltration of smoke from the Corridor into the stairwell

Answer 72

Pressurized stairwell

Question 73

There are two general design methods used for pressurized stairwells. One method is to have a fan supply air to a stairwell at a single point. This is known as the

Answer 73

Single injection method

Question 74

To overcome the possible limitations of a single injection system, a____ can be used

Answer 74

Multiple injection system

Question 75

In a ____ an air supply shaft runs parallel to the stairwell from the supply fan. Air discharge point into the stairwell are located at several points along the stairwell. This method providing more uniform flow of air into the stairwell.

Answer 75

Multiple injection system

Question 76

In a________, the airflow into the stairwell can be adjusted depending on the number of doors that may be open

Answer 76

Compensated system

Question 77

A ________ can adjust the pressure in the stairwell either by modulating the air supply or through over pressure relief

Answer 77

Compensating system

Question 78

Over pressure relief in the stairwell is accomplished through the use of______ that open to the outside, thus relieving the pressure buildup in the stairwell

Answer 78

Dampers

Question 79

The simplest means of controlling the exhaust dampers is to use dampers with

Answer 79

Adjustable counterweights

Question 80

can be provided in the roofs of buildings to permit the release of smoke and heat from the fire.

Answer 80

Vents

Question 81

have spring operated opening mechanisms that can be released by a fusible link or other automatic detectors, including smoke detectors

Answer 81

Vents with metal lids

Question 82

Are used in conjunction with smoke vents to increase their effectiveness

Answer 82

Curtain boards

Question 83

The ____ reduce the dissipation of the heated air currents from a fire and increase the speed of operation of the vents

Answer 83

Curtain boards

Question 84

The depth of a curtain board will vary depending on the nature of the hazards within an occupancy, but should be not less than

Answer 84

20 percent of the ceiling height

Question 85

Curtain boards should be spaced so that they are not farther apart than ___ the ceiling height

Answer 85

8 times

Question 86

Roof vents in the sprinkler building may be a maximum value in removing products of combustion during the final or

Answer 86

Overhaul stages of fire

Question 87

Are used to convert high-voltage electricity, as supplied by the electrical utility service, to an appropriate voltage for use in the building

Answer 87

Transformers

Question 88

Air cooled transformers, also called______, use the surrounding air to cool the unit through fins and heat sinks installed on the body of the transformer

Answer 88

Dry transformers

Question 89

Contain oil to conduct heat away from the core and also to electrically insulate internal components from arcing

Answer 89

Oil cooled or oil filled transformers

Question 90

Because the oil also provides electrical insulation, it must have _____ properties

Answer 90

Dielectric

Question 91

Are typically engine driven, using a gasoline, diesel, or natural gas internal combustion engine.

Answer 91

Generator

Question 92

The ____ is the most common type because gasoline is more hazardous and natural gas may be subject to outages at the same time as the electrical power distribution system

Answer 92

Diesel fuel engine generator

Question 93

At a minimum, the _____will need to supply the required life safety systems plus critical needs of the occupancy

Answer 93

Generator

Question 94

Emergency power supplies that require batteries commonly use

Answer 94

Lead acid type storage batteries

Question 95

Also releases flammable hydrogen gas during battery charging and also during contact with some metals

Answer 95

Sulfuric acid in lead acid batteries