A datum reference frame consists of ____ perpendicular planes.

A. one
B. two mutually
C. three mutually
D. four mutually
E. none of the above


Answer: C

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The system condition that may cause a compressor motor’s overload device to open is a(n) _____.

a. dirty condenser coil b. dirty evaporator blower c. uninsulated suction line d. frozen evaporator coil

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Technician A says that water based fire extinguishers remove oxygen from the fire. Technician B says that CO2 fire extinguishers remove oxygen from the fire. Which technician is correct?

A) Technician A only B) Technician B only C) Both Technicians D) Neither Technician

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What does the DSL technology use for carrying the data?

A. Data link layers B. Existing copper telephone lines C. Computer links D. Cable modems

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Samba is a utility that uses the ____ protocol, which is also used by Windows systems for sharing folders and printers.

A. RPC B. NFS C. IP D. SMB

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