DPO

Question 1

Finish Mechanical Foam is a….

Answer 1

Completed product after air is introduced in the solution and leaves the nozzle

Question 2

The purpose of the check valve in a fire department connection is to prevent…

Answer 2

Water from a sprinkler system from flowing back

Question 3

Pump discharge pressures should not exceed ___psi unless the standpipe system has been designed to withstand higher pressures

Answer 3

185psi

Question 4

Which type of fire pumps must be primed using an external priming device?

Answer 4

Centrifugal

Question 5

Once the power take-off has been properly activated and the pump is engaged, the vehicle speedometer should show a speed of….

Answer 5

Slightly above 0 mph

Question 6

A___distribution system is a network of water mains which provides circulating feed

Answer 6

Grid

Question 7

Using the coefficient method, determine the pressure loss due to friction in the hose assembly

Answer 7

86.5 psi

Question 8

Fire gels work by….

Answer 8

Entrapping water instead of air

Question 9

A hydrant with the largest capacity will be one that is connected to a …..

Answer 9

Primary feeder

Question 10

One method of calculating the capacity of a water shuttle operation in gpm is…..

Answer 10

Travel time divided by the required flow

Question 11

The amount of work that a pump must do to produce a fire stream is the _____pressure

Answer 11

Pump Discharge

Question 12

If a fire department connection is found inoperable, the best way to bypass it so operations can be performed is….

Answer 12

Stretch a medium size diameter supply line into the building and connect it to the standpipe hose outlet on the first floor

Question 13

A dual pumping operation is…..

Answer 13

Placing one pumper at a hydrant and a second pumper connected intake to intake

Question 14

Water flowing through hoses and appliances results in….

Answer 14

Friction Loss

Question 15

Water temperature greater than 90 degrees F can cause _____in the fire pump

Answer 15

Decreased capacity

Question 16

In a _______hydrant, a small drain valve opens as the hydrant is closed

Answer 16

Dry barrel

Question 17

A piercing nozzle would be used on……

Answer 17

An attic fire

Question 18

In-line relay valves allow for…..

Answer 18

Late arriving pumpers to hook up without interrupting operations

Question 19

TO prevent water hammer, it is important to close nozzles, hydrants, valves, and hose clamps……

Answer 19

Slowly

Question 20

An operator should prime a pump when operating…..

Answer 20

From a static source

Question 21

When performing a capacity test, the desired net pump pressure should be _____psi

Answer 21

150 psi

Question 22

The process that causes foam concentrate to move through an in-line foam eductor and into the water stream is the _____principle

Answer 22

Venturi

Question 23

A _____depends on an external water source to provide the water

Answer 23

Dry Standpipe System

Question 24

You should switch from pressure to volume when…..

Answer 24

More than half of the rated capacity of the pump will be required.

Question 25

Compressed air form systems result in.....

Answer 25

Greater reach of fire stream

Question 26

The selection of a proportioner depends on.....

Answer 26

Required ratio of foam and length and size of the attack line

Question 27

The flow from a 1-inch nozzle tip with nozzle pressure of 50 psi is approximately ____gpm

Answer 27

210 gpm

Question 28

To reduce carcinogen exposure after a fire, you should.....

Answer 28

Transport contaminated gear way from passenger compartments

Question 29

All gauges used for service tests must have been calibrated within _____days

Answer 29

60

Question 30

Pump discharge pressure is equal to.....

Answer 30

NP + TPL

Question 31

_____ is a force-per-unit area with the measurements of force in pounds and the measurement of area in square inches

Answer 31

Pressure

Question 32

Relay Operations should be shut down from the _____first

Answer 32

Attack pumper

Question 33

Discharge manifolds may be used in relay operations to ......

Answer 33

Support more than one attack pumper

Question 34

The pressure remaining once water has begun flowing is ______ pressure

Answer 34

Residual

Question 35

Which is a fire hose appliance carried on a fire apparatus

Answer 35

Gated wye

Question 36

The 50 percent pump capacity test is conducted at a net pump pressure of.....

Answer 36

250 psi for 10 minutes

Question 37

Which valve determines whether the pump is operating in series or pressure mode

Answer 37

Transfer valve

Question 38

Which foam has a surfactant added that it makes more fluid

Answer 38

Fluoroprotien

Question 39

One way to increase the efficiency of water shuttle operations is to ....

Answer 39

Decrease the time required to fill the tender

Question 40

An increase in vacuum while drafting indicates a......

Answer 40

Clogged strainer

Question 41

During a water shuttle operation requiring two pumpers, the pumper located near the emergency scene is the.....

Answer 41

Dump site pumper

Question 42

The recommended nozzle pressure for smooth bore master streams is _____psi

Answer 42

80

Question 43

A common reason for eductor failure is......

Answer 43

Improper cleaning and maintenance

Question 44

When pumping from a tank and attack lines are being used intermittently, which is a way the pump operator can ensure the pump does not overheat

Answer 44

Set the circulator valve to tank position

Question 45

When positioning a pumper to supply a fire department connection, the apparatus operator must consider the......

Answer 45

Positioning requirements of the other apparatus

Question 46

Which type of pump may be used as the priming pump of a centrifugal pump?

Answer 46

Rotary vane

Question 47

While transferring water from one dump tank to another, which method is most effective?

Answer 47

Jet siphon

Question 48

An operator obtains a reading of 17 inches of mercury on the intake gauge while drafting and flowing water. This indicates....

Answer 48

A lift of approximately 19 feet

Question 49

Theoretically, the maximum distance a pump can lift water at sea level is _____ feet

Answer 49

33.9

Question 50

High energy foam systems introduce.....

Answer 50

Compressed air into the foam solution prior to discharge into the hose line

Question 51

The recommended nozzle pressure of 2 1/2" hand lines with solid bore tips is ____ psi

Answer 51

50

Question 52

Hose that is laid from the fire to the hydrant is considered a ......

Answer 52

Reverse lay

Question 53

Discharge manifolds may be used in relay operations to......

Answer 53

Support more than one attack pumper

Question 54

Available flow from hydrants is estimated by determining the percent drop between the static and _____pressures

Answer 54

Residual

Question 55

Fire pumpers must carry one straight ladder, one extension ladder, and.......

Answer 55

An attic ladder

Question 56

Nozzle reaction is explained by the law of physics that states.....

Answer 56

For every action there is an equal and opposite reaction

Question 57

For drafting purposes, lift is measured from the....

Answer 57

Surface of the water to the pump intake

Question 58

Which statement about foam is true

Answer 58

IT works by separating, cooling, or suppressing

Question 59

A 2,000 gallon tender makes the round trip between the dump site and fill site in 12 minutes. The flow rating for that tender is ______ gpm

Answer 59

150

Question 60

A relief valve by-passes excess water from the discharge side of the pump to the____

Answer 60

Pump intake

Question 61

The residual pressure reading at the intake gauge in a relay pumping operation should stay above ____psi to prevent damage to the pump

Answer 61

20

Question 62

A _____ indicates flow in gallons per minute

Answer 62

Flow meter

Question 63

What is the approximate pump discharge pressure necessary to deliver 600gpm through a fog nozzle on deck gun using (3) 2 1/2" lines? The lines are 400' long and the deck gun is elevated 20 feet above the pumper (Deck gun FL= 10 psi)

Answer 63

150

Question 64

When color coding fire hydrants, what color will the bonnet be on a hydrant rate to flow 750 gpm

Answer 64

Orange

Question 65

_____ pressure is the difference between the pump discharge pressure and the incoming pressure from the hydrant

Answer 65

Net pump discharge

Question 66

When a pumper is supplying four lines of 2 1/2" hose, each equipped with a 250gpm fog nozzle at 100 psi and each 300 feet long, what is the discharge pressure

Answer 66

138psi

Question 67

A distributor nozzle could be used on

Answer 67

An attic fire

Question 68

When using foam to extinguish a fire, the suppressing method

Answer 68

Prevents the release of flammable vapors

Question 69

The minimum depth of water required to pull a draft using a barrel strainer is

Answer 69

4 feet

Question 70

Which is a fire hose appliance carried on a pumper?

Answer 70

Gated Wye

Question 71

What would be a common problem when looking at a static water source for drafting?

Answer 71

Accessibility

Question 72

The friction loss in 300' of 3" fire hose with 2 1/2" couplings flowing 500 gpm is approximately

Answer 72

60 psi

Question 73

When priming a pump, it is necessary to....

Answer 73

Make the pump as air tight as possible

Question 74

____ consist of a return water line connected from the discharge side of the pump back tot he intake side of the pump

Answer 74

Around the pump proportioners

Question 75

What is the flow from a 2" nozzle with ideal nozzle pressure? (gpm=29.7 x d2 x sq rt NP)

Answer 75

1063gpm

Question 76

The actual maximum height to which water will be lifted when the intake gauge reads 9" of mercury is ______ feet

Answer 76

10.17

Question 77

Which is a feature of a wet barrel hydrant

Answer 77

Does not require draining after use

Question 78

The spiral chamber of a centrifugal pump in which the velocity given to water by the impeller is converted into pressure is the......

Answer 78

Volute

Question 79

The kinds of liquids that are lighter than water are those with a specific gravity

Answer 79

Less than 1

Question 80

What is the friction loss in 300" of 2 1/2" rubber lined hose flowing 350 gpm

Answer 80

74 psi

Question 81

Using the hand method, determine the pumps discharge pressure required to supply the hose assembly.....

Answer 81

150 psi

Question 82

______ are controlled by monitoring the water flow and controlling the speed of a positive displacement foam concentrate pump

Answer 82

Variable-flow, variable-rate direct injection systems

Question 83

The theoretical lift for a pump at sea level is _____feet

Answer 83

33.9

Question 84

Using an in-line eductor, the back pressure must not exceed _______ pressure

Answer 84

70% of the inlet

Question 85

In relay pumping operations, the ______should be positioned nearest the water source

Answer 85

Largest capacity pumper

Question 86

The total friction loss in 500' of 3" hose with 2 1/2" couplings with 300 gpm flowing is approx

Answer 86

36 psi

Question 87

When calculating the time for a shuttle operation, timing starts when the

Answer 87

Dump valve is opened on the tanker

Question 88

In a water distribution grid, the _____supplies individual hydrants

Answer 88

Distributor

Question 89

Each fire pump impeller in a housing is a

Answer 89

Stage

Question 90

The collapse zone of a building should be ______ the structure

Answer 90

One and a half times the height

Question 91

The recommended pressure for standard fog nozzles is

Answer 91

100 psi

Question 92

During an extended period of pumping, a gradual increase in engine temperature is noted. A step to reduce this condition would be

Answer 92

Open aux cooler

Question 93

When using foam to extinguish a fire, the cooling method

Answer 93

REduces the temperature of the fuel and adjacent surfaces

Question 94

If the friction loss is 300 feet of hose at 70 psi, what will the friction loss be in 650 feet of the same size hose flowing the same amount of water?

Answer 94

105 psi

Question 95

Centrifugal fire pumps may make use of

Answer 95

Positive intake pressures

Question 96

PDP is equal to

Answer 96

NP + FL

Question 97

Pressure control devices must operate within _____ with an increase of 30 psi

Answer 97

3-10 seconds

Question 98

Which primer utilizes the venturi principle

Answer 98

Exhaust primer

Question 99

Apparatus equipped with water tanks larger than 500 gallons must provide a tank-to-pump flow rate of ______ gpm

Answer 99

500

Question 100

What is a characteristic of dry hydrants

Answer 100

Found near lakes or rivers