CH 7

Question 1

The most common fuel control problem that truck company personnel face is making sure that the gas

Answer 1

supply to the building is secured
pg 179

Question 2

Operating nut is usually square instead of the crossbar design found on most residential meters.

Answer 2

heavy-duty gas meters
pg 179

Question 3

If a large horizontal tank is involved in fire, and especially if LPG is venting from the tank, firefighters should

Answer 3

not attempt to control the leak
pg 181

Question 4

The DOT Emergency Response Guidebook (ERG 2008) recommends pulling back ___ in these instances. (BLEVE)

Answer 4

1/2 mile
pg 181

Question 5

Because _______ is heavier than air, leaking gas will tend to stay close to the ground and collect in depressions, basements, underground vaults, and other low areas.

Answer 5

LPG
pg 183

Question 6

If evacuations are necessary, those located _____ of _________ of the leak (LPG) are the most at risk and should be evacuated first.

Answer 6

downhill; downwind
pg 183

Question 7

Many buildings in North America are heated with _____ rather than natural gas or LPG.

Answer 7

oil
pg 183

Question 8

Perhaps the most dangerous phenomenon associated with oil-fired appliances is commonly called a

Answer 8

white ghost
pg 184

Question 9

The DOT ERG 2008 recommends staging anywhere from _____ from the source of both LPG and natural gas leaks.

Answer 9

160 to 330 ft
pg 185

Question 10

LEL for natural gas is 5% ______ ppm many fire departments establish a perimeter at 10% of that figure - .5% _____ppm.

Answer 10

50,000; 5,000
pg 186

Question 11

LEL for propane is 1.5% _____ppm any reading above .15% ____ppm may be too dangerous.

Answer 11

15,000; 1,500
pg 186

Question 12

The electrical power to a burning building may come from the ______, _______ installed on the roof of the building, or an onsite __________.

Answer 12

conventional power grid; photovoltaic (PV) solar panels; wind turbine generator
pg 188

Question 13

Under ideal conditions, these devices may be able to detect AC current in a single 120-volt line from as far as 15 feet.

Answer 13

Alternating current detectors
pg 194

Question 14

If the conductor is lying on wet soil, the range may be reduced to as little as

Answer 14

1 foot
pg 194

Question 15

With higher potentials, such as those in distribution and transmission lines, the detection range can increase to more than

Answer 15

500 feet
pg 194