Chapter 6

Question 1

This is a reason that driver/operators may need to determine the amount of water discharged from a solid stream nozzle?

Answer 1

Test the water supply when a nozzle is attached to a hydrant

Question 2

Which of the following is a characteristic of master stream nozzles?

Answer 2

Offer ability to operate at a greater distance from the fire

Question 3

Pre-piped waterways on elevated master streams generally feature a master stream that may be remotely controlled from the apparatus turntable, and is generally able to move.

Answer 3

both up and down and side to side.

Question 4

Which of the following directly affects the reach of the fog stream?

Answer 4

Volume of water flowing

Question 5

High pressure fog nozzles are BEST suited for:

Answer 5

wildland fires

Question 6

What happens to an automatic nozzle when the pump discharge pressure rises above the constant operating pressure?

Answer 6

Automatic nozzle maintains its constant operating pressure, within the limitation of its design

Question 7

A solid stream nozzle is designed so that the volume of water flowing through the nozzle:

Answer 7

is gradually reduced until just before the orifice.

Question 8

Why are most fog nozzles designed to operate at or below 100 psi (700 kPa) nozzle pressure?

Answer 8

Above this pressure, handlines become unwieldy for firefighters attempting fire suppression operations.

Question 9

Which of the following is a simple guideline for the customary system of measurement that may be used to achieve approximate solid stream nozzle reaction on the fireground?

Answer 9

NR = Q/3

Question 10

Master stream appliances should be operated at a maximum of:

Answer 10

80 psi

Question 11

Which of the following is the customary formula for determining nozzle reaction for solid stream nozzles?

Answer 11

NR = 1.57 × d&squared; × NP

Question 12

Which manner of producing fog streams occurs by deflecting water around an inside circular stem in the nozzle?

Answer 12

Periphery-deflected streams

Question 13

Which of the following BEST determines the flow and reach of a solid stream?

Answer 13

Nozzle pressure and size of the discharge orifice

Question 14

Which of the following is a type of variable flow nozzle with the ability to change patterns while maintaining the same nozzle pressure?

Answer 14

Automatic fog nozzle

Question 15

Which nozzle is commonly used in aircraft fire fighting or to apply water to voids, attics, or other areas inaccessible to standard fire streams?

Answer 15

Piercing nozzle

Question 16

Which nozzle may require insertion of an inline shut off valve at a location back from the nozzle to increase safety and ease of operation?

Answer 16

Cellar nozzle

Question 17

Nozzle reaction occurs as water is discharged from a nozzle at a given pressure and:

Answer 17

a counterforce pushes back against firefighters operating the hoseline.

Question 18

A solid stream nozzle produces a fire stream that has a:

Answer 18

tight stream and little spray or shower effect

Question 19

Which of the following statements about master stream appliances is MOST accurate?

Answer 19

Each type of monitor has ability to change the stream direction or angle while water is being discharged.

Question 20

Master stream nozzles would MOST likely be used at an incident where:

Answer 20

handlines would be ineffective.

Question 21

Which pattern is MOST often provided by impinging stream nozzles?

Answer 21

Wide-angle fog pattern

Question 22

Generally, the maximum flow for a handline is 350 gpm (1 400 L/min) because greater flows will:

Answer 22

produce a nozzle reaction that is difficult or dangerous for firefighters to handle.

Question 23

Which nozzle consists of a solid piece of brass or steel with many small impinging holes that produce a very fine mist?

Answer 23

Chimney nozzle

Question 24

Which of the following is designed to allow the firefighter operating the handline to select a flow rate to suit the fire and operating conditions?

Answer 24

Selectable gallonage nozzle

Question 25

In the metric formula for nozzle reaction for a fog stream nozzle, what does Q stand for?

Answer 25

Total flow through the nozzle in liters per minute (L/min)

Question 26

Which of the following is the customary formula for nozzle reaction for a fog stream nozzle?

Answer 26

NR = 0.0505 × Q × √NP

Question 27

Which of the following is designed to flow a specific volume of water on all stream patterns at a specific nozzle discharge pressure?

Answer 27

Constant flow fog nozzle

Question 28

Which nozzle may also be referred to as a distributor?

Answer 28

Cellar nozzle

Question 29

Which statement about high pressure fog nozzles is MOST accurate?

Answer 29

They have a relatively low volume of water delivery