Utilizing a filter at decreased airflow levels will ________ the efficiency and ________ the pressure drop in the duct
A) decrease, decrease B) decrease, increase
C) increase, decrease D) not change, decrease
C
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_________________________ are short lines that overlap or are placed inside the axis line. They can be added to axis lines to emphasize the units or increments specified on the scale.
Fill in the blank(s) with the appropriate word(s).
Humans make use of roots as foods
Indicate whether the statement is true or false
A tool which holds pipe securely and permits one plumber to do work that otherwise would require two
workers is called a _____. a. winch b. threader c. vise d. ratchet
When the rate at which a circulator adds head to the fluid in a piping system equals the rate at which the piping system dissipates this head, the system is in hydraulic equilibrium, and flow rate will ____.
a. remain constant b. steadily increase c. occasionally decrease d. fluctuate only slightly