Pumper Chapter 6

Soild stream nozzles on handlines should generally be operated at what psi? pg194

• 35

• 50

• 65

• 80

In the formula NR = 1.57𑇐d²𑇐NP what does “d” represent? pg203

• The nozzle diameter

• The diameter of the smallest hole

• The diameter of the couplings

• The diameter of the intake

A wide angle stream would be defined as a stream with an internal angle of over _. pg197 Figure 6.5

• 50º

• 60º

• 70º

• 80º

Most constant flow nozzles are designed to operate at a nozzle pressure of __ psi. pg197

• 100

• 50

• 75

• 125

These nozzles operate at a pressure of up to 800psi and low water flow of only 8 to 15 gpm. pg199

• High Pressure Fog Nozzles

• Cellar Nozzles

• Low Flow Pressure Nozzles

• Wide Spread Wildfire Nozzles

Which of the following is not a type of Master Stream Appliance? pg200

• Fixed monitors

• Combination monitors

• Portable monitors

• Aerial monitors

Depending on the incident, firefighters may need to deploy these to operate effectively in unusual locations or on specific fuels. pg200

• Special purpose nozzles

• Penetrating nozzles

• Function nozzles

• Distributers

Generally, what is the maximum flow in gpm for a handline? pg199

• 300

• 350

• 400

• 450

Which of the following statements regarding ensuring adequate discharge pressure to hose lines, particularly those equipped with automatic nozzles, is most correct? pg198

• Providing inadequate pressure to hose lines poses no significant risk during fire suppression efforts.

• The appearance of a well-formed stream is the sole indicator of sufficient discharge pressure to hose lines.

• Inadequate discharge pressure to hose lines, even with a seemingly well-formed stream, may compromise fire suppression effectiveness.

• Hose lines with automatic nozzles require less pressure compared to standard nozzles for effective fire suppression.

Which of the following statements accurately describes the principle of operation of most constant flow nozzles? pg197

• Constant flow nozzles typically maintain a fixed pattern range.

• The pattern adjustment of constant flow nozzles is achieved by manipulating the interior barrel rather than rotating the exterior barrel.

• Most constant flow nozzles utilize a periphery-deflected stream and pattern adjustments are made by rotating the exterior barrel.

• Constant flow nozzles do not require any pattern adjustments as they are designed to maintain a single pattern setting throughout operation.