Fire Tech 302

Front 1

Which class of portable extinguisher uses a nonconductive agent?

Back 1

Class C

Front 2

Which class of portable extinguisher would be suitable for a fire in a trash bin?

Back 2

Class A

Front 3

What standard is the basis for the fire extinguisher rating system?

Back 3

UL 711

Front 4

Dry chemical and dry powder extinguishers must have a minimum horizontal discharge range of:

Back 4

10 feet

Front 5

If an extinguisher is rated 60-B, what does the numeral 60 represent?

Back 5

60 square feet

Front 6

Which of the following extinguishing agents extinguishes fire primarily through a smothering action by establishing a gaseous blanket between the fuel and the surrounding air?

Back 6

Carbon Dioxide

Front 7

Which of the following is a "clean" extinguishing agent that meets EPA standards for discharge into the atmosphere?

Back 7

Halotron

Front 8

For which class of fires is the extinguishing agent NA-X especially effective?

Back 8

Class D

Front 9

What is the most common type of stored pressure extinguisher?

Back 9

APW

Front 10

The main factor in determining the distribution of fire extinguishers in a structure is the _____ .

Back 10

Type of occupancy

Front 11

An occupancy where the amounts of ordinary combustible materials and flammable liquids present are high and a rapidly spreading fire may develop is classified as ____ .

Back 11

Extra Hazard

Front 12

For which class of extinguisher is the travel distance to the hazard the primary factor in determining the extinguisher's distribution?

Back 12

Class B

Front 13

Which NFPA standard details requirements for portable extinguishers on fire apparatus?

Back 13

NFPA 1901

Front 14

What should be used for pressurizing dry-chemical extinguishers?

Back 14

Nitrogen

Front 15

If extinguisher maintenance is recorded on a collar tag, how is it affixed to the extinguisher?

Back 15

Secured to the neck of the extinguisher

Front 16

Initially, a water-based extinguisher should be used at a distance of _____ from the fire.

Back 16

10 to 30 feet

Front 17

For which of the following flammable liquids is AFFF an effective extinguishing agent?

Back 17

Kerosene

Front 18

Which of the following would be the best choice for extinguishing a fire involving sensitive electrical equipment?

Back 18

Water mist

Front 19

When attacking a Class D fire, firefighters should cover the burning material with a ____ layer of dry powder agent.

Back 19

2-inch

Front 20

The ability to form a soapy foam that prevents fuel from reigniting is ____ .

Back 20

Saponification

Front 21

Which fire alarm system component processes signals from actuating devices and transmits them to the alerting system?

Back 21

Control Unit

Front 22

Bells, buzzers, and horns are examples of _____ .

Back 22

Notification appliances

Front 23

Which typer of alarm system typically involves a company that sells its services to many individual customers?

Back 23

Central station

Front 24

Which type of automatic detector typically is slowest to activate under fire conditions?

Back 24

Heat

Front 25

Which type of testing is performed soon after an alarm system has been installed?

Back 25

Acceptance

Front 26

What two gases do fire gas detectors monitor?

Back 26

Carbon Dioxide and Carbon Monoxide

Front 27

What are the two basic types of smoke detectors in use?

Back 27

Photoelectric and ionization

Front 28

Which types of detectors are among the fastest to respond to fires but also easily tripped by non-fire conditions such as welding?

Back 28

Flame detectors

Front 29

Which alarm system component might be designed to pressurize a stairwell for evacuation?

Back 29

Auxiliary services

Front 30

Which of the following occupancies would be most likely to have a presignal alarm?

Back 30

Nursing home

Front 31

Which type of alarm system is usually connected to the dispatch center through a leased telephone line or a radio signal over a dedicated fire department frequency?

Back 31

Remote

Front 32

What is the maximum allowable travel distance to manual pull stations?

Back 32

100 feet

Front 33

Which type of pull station sends an intermittent signal that reflects its location in the system?

Back 33

Coded

Front 34

Which type of heat detection device is used to monitor a large area?

Back 34

Continuous line

Front 35

Smoke inhalation causes about _____ percent of fire deaths.

Back 35

65

Front 36

Which type of smoke detector converts a beam of light into current that keeps a switch open?

Back 36

Photoelectric

Front 37

Which type of smoke detector responds more quickly to flaming fires?

Back 37

Ionization

Front 38

Who usually is responsible for performing service tests on fire detection and signaling equipment?

Back 38

Occupants

Front 39

What is the recommended way of cleaning dust or dirt from initiating and indicating devices?

Back 39

Vacuuming

Front 40

Records of all detector tests must be maintained for a minimum of ____ years.

Back 40

5

Front 41

What is the primary way in which water extinguishes fire?

Back 41

Cooling

Front 42

What is the ratio between the amount of heat needed to raise the temperature of a specified quantity of a material and the amount of heat needed to raise the temperature of an identical quantity of water by the same number of degrees?

Back 42

Specific heat

Front 43

What is the quantity of heat absorbed by a substance when it changes from a liquid to a vapor?

Back 43

Latent heat of vaporization

Front 44

What is the density of liquids in relation to water?

Back 44

Specific gravity

Front 45

Water converted to steam occupies _____ times its original volume.

Back 45

1700

Front 46

The speed at which water flows through hose or pipe is known as ______ .

Back 46

Velocity head pressure

Front 47

Fluid pressure is _____ to any surface on which it acts.

Back 47

Perpendicular

Front 48

According to the fourth principal of pressure, the pressure of a liquid in an open vessel is proportional to its _____ .

Back 48

Depth

Front 49

What is the height of a water supply above the discharge orifice?

Back 49

Elevation head

Front 50

The stored potential energy available to force water through pipe, fittings, fire hose, and adapters is ____ pressure.

Back 50

Static

Front 51

That part of the total available pressure not used to overcome friction loss or gravity while forcing water through pipe, fittings, fire hose, and adapters.

Back 51

Residual pressure

Front 52

What is the surge that results from suddenly stopping the flow of water through a hose or pipe?

Back 52

Water hammer

Front 53

Which type of water distribution system provides circulating feed from several mains?

Back 53

Grid

Front 54

What is the recommended minimum size for hydrant supply mains in high-value districts?

Back 54

8 inches

Front 55

Which of the following materials is most likely to be used in modern water distribution systems?

Back 55

Polyvinyl chloride plastic

Front 56

Which type of piping arrangement has exactly one inflow point and one outflow point and exactly two paths between the inflow and outflow points?

Back 56

Simple flow

Front 57

Which type of valve involves a hollow metal post that is attached to the valve housing?

Back 57

Post indicator

Front 58

Which type of valve do municipal water supply systems most commonly use?

Back 58

Buried nonindicating

Front 59

What characteristic makes dry barrel hydrants easy to recognize?

Back 59

Operating nut on top of the hydrant

Front 60

What is the greatest problem associated with providing fire protection water supplies from elevated tanks?

Back 60

Limited pressure available

Front 61

In a Class I standpipe system, what is the minimum residual pressure required at the most hydraulically demanding hose connection?

Back 61

100 psi

Front 62

In which type of automatic sprinkler system is pipe sizing based on the number of sprinklers supplied?

Back 62

Pipe schedule

Front 63

What is the recommended duration of water supplies for exterior manual fire fighting using flows larger than 2,500 gpm?

Back 63

3 hours

Front 64

What is the required duration of water supplies for standpipe and hose systems?

Back 64

30 minutes

Front 65

Which of the following standards stipulates criteria for installation, testing, and maintenance of fire pumps?

Back 65

NFPA 20

Front 66

The rotor inside a pump casing is called a(n)

Back 66

Impeller

Front 67

What is commonly the lowest rated capacity for fire pumps?

Back 67

500 gpm

Front 68

What is the lowest permitted pressure rating for a standard fire pump?

Back 68

40 psi

Front 69

A pump is said to be operating at ____ when it is running with all discharges closed.

Back 69

Churn

Front 70

The primary advantage of a diesel enging pump driver over an electric motor driver is that the diesel engine is _____ .

Back 70

Self-powered

Front 71

Which type of pump is used to prevent false pump starts due to pressure fluctuations?

Back 71

Pressure maintenance pumps (jockey pump)

Front 72

The aboveground pipe in a pump installation must be constructed of ______ .

Back 72

Steel

Front 73

The _____ relief valve is designed to prevent the pump from overheating when it is operating at churn against a closed system.

Back 73

Circulation

Front 74

How many pressure gauges are required on vertical turbine pumps?

Back 74

One

Front 75

In the first test point, the maximum allowable pressure for a pump to develop when operating against a closed system is _____ percent of its rated pressure.

Back 75

140

Front 76

How long should an electric motor be run during weekly pump startups?

Back 76

10 minutes

Front 77

What is the term for the curves that a pump manufacturer plots when testing a pump before shipping it?

Back 77

Certified shop test curves

Front 78

How many times in addition to the first phase must manually controlled pumps be manually started an stopped during pump tests?

Back 78

Six

Front 79

About how fast should water leak from a fire pump's packings?

Back 79

One drop every second

Front 80

How much does doubling a pump's speed increase the pressure?

Back 80

4 times