The BOD of wastewater is determined by
a. evaporating the sample and weighing the residue
b. filtering the sample and weighing the trapped solids
c. heating the sample for 5 days and then measuring the DO
d. measuring the DO consumed in a diluted sample after 5 days
e. measuring the suspended solids after 5 days of settling
d
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Atmospheric pressure is created by:
A) Centrifugal force created by the spinning of the earth. B) The weight of the air in the atmosphere. C) There is no such thing as atmospheric pressure. D) The earth's magnetic field.
Before starting an oil furnace, the technician should check to see that
A) The cleanout doors are open to allow unwanted debris to be blown out during ignition B) The flame observation door and all cleanouts are open C) The flame observation door and all cleanouts are closed D) The flame observation door is open for viewing
Craftworkers who perform such tasks as building stairs, installing trim, and hanging doors are considered
_____. a. master carpenters b. rough carpenters c. detail carpenters d. finish carpenters
Box A and box B each contain type C connectors. Box A contains 200 connectors and costs $30. Find the cost of box B, which contains 260 connectors. The unit price is the same for both boxes.
Fill in the blank(s) with the appropriate word(s).