A square pool fire is 5' by 5'. How much radiative heat flux will be received by a target standing 10' from the center of the pool?

Group of answer choices

1 kW/m^2

3 kW/m^2

6 kW/m^2

9 kW/m^2

Flag question: Question 87Question 871 pts

An asphalt shingle (1/2" thick) at an ambient temperature of 20 C is exposed to a heat flux of 25 kW/m^2. What is the approximate time to ignition of the shingle?

Group of answer choices

12 seconds

112 seconds

324 seconds

12 minutes

Flag question: Question 88Question 881 pts

How long does it take an ultra-fast t-squared fire to reach 6MW?

Group of answer choices

185 seconds

325 seconds

412 seconds

499 seconds

Flag question: Question 89Question 891 pts

What heat release rate would a slow t-squared fire be at a time of 400 seconds?

Group of answer choices

111 kW

222 kW

333 kW

444 kW

Flag question: Question 90Question 901 pts

A 1MW fire in the middle of a room has a 5' diameter. What is the flame height?

Group of answer choices

3.4 feet

6.9 feet

9.3 feet

12.4 feet

Flag question: Question 91Question 911 pts

A pool of gasoline in a parking lot has an area of 1 m^2. What will its heat release rate be?

Group of answer choices

1,202 kW

2,404 kW

4,808 kW

6,606 kW

Flag question: Question 92Question 921 pts

What is the diameter of a 1m^2 pool in feet (3.28 feet/meter)

Group of answer choices

1.1 feet

2.5 feet

2.9 feet

3.7 feet

Flag question: Question 93Question 931 pts

What is the flame height of a pool fire with a heat release rate of 2,400 kW and a diameter of 3.7 feet?

Group of answer choices

3.2 feet

6.4 feet

8.8 feet

13.2 feet

Flag question: Question 94Question 941 pts

A pipe with a 1.8" inner diameter breaks off 20 feet from the regulator, which is set at 10 inches water. If the specific gravity of the gas is 0.65, what is the flow rate out of the open end of the pipe?

Group of answer choices

16 cfm

32 cfm

165 cfm

330 cfm

Flag question: Question 95Question 951 pts

Natural gas is flowed at a rate of 250 m^3/hour into a perfectly sealed room with a volume (above the leak) of 100,000 ft^3. How much time will elapse before a concentration of 15% is reached?

Group of answer choices

10 minutes

111 minutes

18 hours

1.1 days

Flag question: Question 96Question 961 pts

Natural gas is flowed at a rate of 250 m^3/hour into a room with 1 air change per hour ventilation. The room has a volume (above the leak) of 100,000 ft^3. What is the maximum gas concentration that is reached?

Group of answer choices

2.1%

4.1%

8.1%

12.1%

Flag question: Question 97Question 971 pts

A 30'x20' room with 8' ceilings has a medium t-squared fire. At what time will the oxygen in the room falls below 14%?

Group of answer choices

36 seconds

72 seconds

360 seconds

720 seconds

Flag question: Question 98Question 981 pts

A 30'x20' room with 8' ceilings has a medium t-squared fire. What will the fire size be when the oxygen in the room falls below 14%?

Group of answer choices

1440 kW

2880 kW

4200 kW

4950 kW

Flag question: Question 99Question 991 pts

A room used for medical purposes has an initial oxygen concentration of 25%. The room is 30'x20' with 8' ceilings. With a medium t-squared fire in the room at what time will the oxygen fall below 14%?

Group of answer choices

42 seconds

420 seconds

4.2 minutes

4.2 hours

Flag question: Question 100Question 1001 pts

A fire in the middle of a room is 2 feet tall. If that same fire is moved to the corner of the room, approximately how tall will it be?

Group of answer choices

2 feet

4 feet

8 feet

12 feet