TB 7

Question 1

TB7 Water has a great cooling effect because it expands ____ to 1

Answer 1

1700

Question 2

TB7 All the following are true of a spray nozzle.

Answer 2

• less reach and less penetration
• excessive pressures breaks up spray quicker
• Does not deliver good reach and GPM at large fires

Question 3

TB7 Spray stream has greater ____ coverage so less nozzle movement is required

Answer 3

Angular

Question 4

TB7 One gallon of water absorbs _____ BTU in changing to steam

Answer 4

9330 BTU

Question 5

TB7 when changing one gallon of water to steam only 1250 BTUs are being utilized in raising the water temperature from 62 to ____ degrees

Answer 5

212 F

Question 6

TB7 what will spray streams do to oxygen concentration

Answer 6

Reduces it

Question 7

TB7 All the following are true about spray nozzle

Answer 7

-the fine spray limits the amount of water applied to fire
- does not create tenable situation of steam/oxygen dilution
-hand lines are easier to handle at higher psi