Firefighting quiz for April 2001

April 2001Questions:

After taking the quiz, you can post your answers or comments on Fire Talk.

1. Assume you are called to a home for a sounding CO alarm. The alarm is sounding for approximately three to five seconds every three to four minutes. Why is it sounding?

A. It is a trouble signal
B. It is a full alarm signal
C. It is a warning signal
D. There is no way to tell why it is sounding. You must do an investigation.

Answer: C - It is an early warning signal, indicating there is a buildup of gas that hasn't reached the prescribed activation levels. This feature can be found on detectors that conform to the revised UL 2034 standard.

2. When automotive batteries are charging, they give off Hydrogen gas. What is the explosive range of this gas?
A: 4% to 70%

3. A flat roof 20x40 feet with a parapet has a clogged drain and six inches of standing water on the roof. How much will this water weigh?
A: It will contain 400 cubic feet of water and will weigh 24,960 lbs.

4.A typical residential oil burner operates how many hours a year?
A: Approximately 1,500 hours a year. It is amazing that we are not called to more oil burner emergencies.

5. Power companies sometimes reduce voltage to its customers when it is unable to meet demand. What problems can this cause?
A: A hot box or meter, smoke, electrical odors or noise from the box.

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