UNIX/Linux systems interpret ____ to mean the parent directory.

A. dot (.)
B. dot (..)
C. backward slash (\)
D. forward slash (/)


Answer: B

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If a mercury thermostat seems out of adjustment, the first thing to do is _____.

a. recalibrate the thermostat b. reset the system switch to Off c. check for accurate leveling d. adjust the setting lever

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Technician A says to use synthetic grease to lubricate the backing plate. Technician B says to use special lithium-based brake grease. Which technician is correct?

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

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The typical shielding gas for GTAW on deoxidized copper that is over 1/8? (3.2 mm) thick is _____

a. helium b. hydrogen c. oxygen d. argon

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Which of the following is NOT true about infrared light?

A. it can be used in directed transmissions B. it can be used in diffused transmissions C. it is less susceptible to interference from visible light sources D. all infrared signals are invisible

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