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Flashcards in 4 Building Systems Deck (107)
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91

High voltage electrical equipment is defined as operating at

600 volts or higher

92

Low voltage equipment operates at

Less than 600 volts

93

Transformers

Used to convert high voltage service to manageable voltage for building use.

94

Transformers may be high or low voltage, their cooling method is one of two

Air or oil

95

Dielectric

Nonconductor of direct electrical current.

96

Older transformers carry what type of oil

High in PCBs, and must be labelled. Flammable.

97

Transformers located inside buildings must be enclosed in

3 hour rated transformer rooms if unsprinklered. Sprinklers present then 1 hr room

98

Diesel fuel power generator is most common type because

Gasoline is more hazardous and natural gas may be lost during power outages.

99

Generators may be located outside or on roofs for ventilation and cooling. If stored inside what is required.

Installed in fire rated room with fuel spill control

100

Day tanks are located in either the same room or on the generator and is typically limited in capacity by code to

60 gallons of diesel, usually kept full pumped by main tank

101

Lead acid batteries contain

Lead and sulfuric acid,

102

During charging, sulfuric acid releases

Hydrogen gas

103

Thermal runaway

Battery fire

104

Lead acid batteries are also known as

Wet cell
Gel cell
Starved electrolyte cell
Sealed cell
Maintenance free cell
Flooded cell

105

Firefighting gear is not designed to be exposed to what concerning batteries

Acid

106

Small uninterruptible power supplies, UPS, containing lead acid batteries are found near

Fire a,arm control panels, under desks, next to computers.

107

When more than one elevator hoistway is provided, up to how many elevators may be located in one hoistway

Up to 4