What procedure should be used to size air-conditioning equipment?
A) Multiply the rooms by 120 to get the system airflow, then divide that answer by 400 to get the unit capacity in tons.
B) Perform a load study using ACCA Manual J.
C) Divide the house square footage by 600 and round up to the nearest whole number to arrive at the unit capacity in tons.
D) Divide the house volume by 15 to arrive at air changes and then divide that answer by 400 to get the unit capacity in tons.
B
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Two mutually exclusive alternatives have the estimates shown below. Use annual worth analysis to determine which should be selected at an interest rate of 10% per year.
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Acetylene tanks should always be stored and transported:
A) Upright, but at an angle of no more than 45 degrees and safely secured. B) Upright and safely secured in a vertical position. C) In such a manner as to safely store or transport the greatest number of cylinders possible. D) In a safely secured horizontal position.
Air consists of approximately __% nitrogen, __% oxygen and __% other gases
Fill in the blank(s) with the appropriate word(s).
A capacitive probe is a recommended device to measure the level of mineral water in a tank.
Answer the following statement true (T) or false (F)