The term ____ refers to a "black hole"; any data sent to this device is gone forever.

A. void
B. root
C. null
D. console


Answer: C

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A 2,700 sq. ft. geothermal heat exchange bed is 125 ft. wide.  The bed's length is:?

A. ?21.6 ft. B. ?1,225 ft. C. ?2,450 ft. D. ?2,575 ft.

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Thick wires have a ________ AWG rating than thin wires

A) Higher B) Lower

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Technician A says that the stoichiometric ratio for gasoline is about 9.0:1. Technician B says that the stoichiometric ratio for ethanol is about 9.0:1. Which technician is correct?

A) Technician A only B) Technician B only C) Both technicians D) Neither technician

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How many channels are available with 802.11a in some countries?

A. 11 B. 23 C. 14 D. 52

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