Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Captain Exam 2024 > Routine Emergencies Fire Engineering > Flashcards

Routine Emergencies Fire Engineering Flashcards

1
Q

Insulation of burning wire containing PVC will give off what gas?

A

Hydrogen Chloride

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is contained in some transformer coolants that give off carcinogens when they burn?

A

Polychlorinated biphenyls

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

A fluorescent fixture that is blinking, dim, or not working can indicate:

A

Overheated ballast

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What does a typical ballast transformer consist of?

A

Fine copper wire wound around an iron core

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Where can a ballast normally be found?

A

Encased in a metal box attached to the reflector hood

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What can cause a ballast to overheat?

A

Short in the transformer core
Failure of the capacitor, light starter, or one of the fluorescent lamps

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is a normal temp for a ballast?

A

140 degrees

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Ballasts manufactured before 1979 can contain what?

A

PCB-contaminated dielectric fluid; produces dioxin contaminated smoke

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Fluorescent lamps manufactured after what year contain thermal protection to protect the ballast from overheating?

A

1968

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

When did UL require thermal protection for recessed lighting?

A

1982

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

How many times does an electrical system try to restore power automatically?

A

3 times; 3 trips to lockout

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Before residential use, voltage is stepped down to about how many volts?

A

124; 240 for heavy users

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is the appropriate way to flood a manhole?

A

Unmanned, open-butt hoseline. 2-1/2” or larger line, tied off or heavy object to keep it from moving

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What are the most common home-heating fuels?

A

Oil and gas

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What are the most common home-heating fuel oils?

A

No. 2 oil; No.6 oil for commercial applications

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What are the most common home-heating gases?

A

Propane and natural gas

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Fuel oil is separated by viscosity into how many levels of oil?

A

No. 1 through No. 6 oil. 1 is the lightest, 6 the heaviest

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

How many cubic feet of air does a gallon of oil require to burn completely?

A

2,000

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

What is the typical sized fuel storage tank for private dwellings?

A

275-gallon tank

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

How much fuel do oil burners consume per hour for domestic and commercial installations?

A

Domestic between 1-10 gallons of fuel per hour
Commercial up to 50 gallons per hour

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

Domestic oil burners operate how many hours per day?

A

8 hours of every 24; 1,500 hours a year

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

Home heating unit fuel pumps deliver fuel at what pressure?

A

100psi

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

Motors for heating units operate at what RPM?

A

1,725 rpm for older units, 3,450 for newer ones

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

The nozzle assembly for heating units separates fuel into how many droplets of fuel at what pressure?

A

55 billion per gallon at 100psi

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

What are the two types of ignition systems in use for oil burners?

A

Intermittent or interrupted ignition systems; Constant ignition systems

26
Q

Residential boilers have limited controls. Residential boilers operate at what maximum pressures for hot water and steam?

A

15psi for hot water and 2psi for steam

27
Q

Of all the problems with burners, what poses the greatest danger?

A

Delayed ignition (puff back)

28
Q

What is the leading cause of delayed ignition in home heaters?

A

Faulty ignition

29
Q

The burning of pooled oil in the combustion chamber after the burner shuts down is called what?

A

Afterfire

30
Q

What are the indicators of a “white ghost”?

A

Pearly white smoke looks like steam, tastes and smells like oil

31
Q

What are signs of a blocked or disconnected flue or chimney?

A

Smoke that fills the burner room and an oily odor

32
Q

How may residential water heaters are in use today and how many are getting ready to malfunction?

A

100,000,000; 1%

33
Q

At what limits will the temperature-pressure valve operate on a water heater?

A

Water exceeds 210 degrees or pressure exceeds 150psi

34
Q

What are the components of natural gas for domestic use?

A

70-90% methane with ethane making up most of the remainder

35
Q

How dense is natural gas relative to air?

A

Natural gas is two-thirds as dense as air

36
Q

What is the flammable range of natural gas in air?

A

4-14%

37
Q

What pressure is natural gas delivered to appliances in the home?

A

1/4psi or 7 inches of water column

38
Q

Air typically constitutes what percentage of all flammable gas-air mixtures?

A

90%

39
Q

What percentage of oxygen does motor coordination become affected? Judgement and fatigue set in? Lose consciousness and die?

A

17%; 10-14%; 6-10%

40
Q

What is the weight of fresh water per cubic foot?

A

62.4 pounds per cubic foot at 40 degrees

41
Q

1/4 of fires are what kind of fires?

A

Vehicle fires

42
Q

What is the explosive range of hydrogen?

A

4-71%

43
Q

Smoke from burning food likely contains:

A

Sulfur, nitrogen dioxide, and carbon monoxide

44
Q

Rubber, carpeting, or upholstery burning can produce what gas?

A

Hydrogen cyanide

45
Q

What is produced from burning carpeting?

A

Acrolein

46
Q

Burning trash containing plastic can give off what?

A

Hydrogen chloride

47
Q

Burning plastic containing PVC can contain what gas?

A

Phosgene gas

48
Q

What affinity does carbon monoxide have relative to oxygen?

A

Over 200 times; 200-270 times

49
Q

How many deaths and illnesses are caused from accidental carbon monoxide poisoning each year?

A

1,500 deaths and over 10,000 illnesses

50
Q

Who developed the first affordable CO detector?

A

Dr. Goldstein in conjunction with the Quantum Group

51
Q

What percentage of carbon monoxide is absorbed into body tissue?

A

15%

52
Q

One half of the carbon monoxide a person absorbed into the blood stream can take how long to leave the system?

A

5 hours

53
Q

How much higher with the COHb of the fetus continue to rise relative to the mother?

A

As much as 15%

54
Q

How much longer is the fetal COHb half life of carbon monoxide than the maternal mother?

A

3-5 times longer

55
Q

What percentage of carbon monoxide poisonings present with cherry red coloration?

A

10%

56
Q

What percentage of studied patients seen at the hospital for flu-like symptoms actually suffered from low-level CO poisoning?

A

23.6%

57
Q

With 100% oxygen and a tight fitting mask, the half life of CO drops to what duration?

A

80 minutes

58
Q

How much CO can a stove give off before reaching operating temperature?

A

35-400ppm
Oven as much as 800ppm

59
Q

What term is used in place of backdraft pertaining to chimney or flues?

A

Downdraft

60
Q

A car can give off how much CO before being warmed up?

A

30,000ppm

61
Q

What percentage of homes have CO detectors?

A

6%

62
Q

What ppm do Chicago and FDNY set for wearing SCBA for CO?

A

Chicago 35ppm; FDNY 9ppm

Captain Exam 2024 (4 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions