In the Linux Bash shell, the ____ key combination deletes a word or consecutive characters.

A. Ctrl+b
B. Alt+d
C. Alt+l
D. Ctrl+a


Answer: B

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In life-cycle costing, the compounding period will usually be _______.

A. daily B. weekly C. bi-monthly D. annual or monthly

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How does the refrigerant charge affect a system's subcooling?

A) Adding refrigerant increases the system subcooling B) Adjusting the refrigerant charge only affects the subcooling if the refrigerant is added on the high side C) Removing refrigerant increases the system subcooling D) The refrigerant charge does not affect the system subcooling

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Helical gears have their teeth cut at an angle, allowing more than one tooth to be in contact.

Answer the following statement true (T) or false (F)

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During a performance test of an air conditioning system how long should you let the unit run and stabilize before taking a vent temperature reading?

A. 2 to 3 minutes B. 3 to 4 minutes C. 5 to 10 minutes D. 15 to 20 minutes

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