The amount of a pesticide that hits the target pest is usually ________ of the amount applied to the ecosystem
A) less than 5% B) 20 to 25% C) 25 to 50% D) 50 to 75% E) 75 to 95%
A
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If staples are not required to close the lap joint on duct wrap, then _____.
a. it can be secured by stitching with needle and thread b. quick-drying adhesive should be brushed on the facing tabs c. tape is wrapped around the duct wrap to hold it in place d. contact tape is used to adhere the duct wrap to the duct
A brazed joint should be cleaned with _____.
a. a grinder b. warm water c. a file d. sandpaper
At about what temperature does oxygen combine with the nitrogen in the air to form NOx?
A) 500 deg F B) 1500 deg F C) 2500 deg F D) 750 deg F
Caution must be used with changing from one filter type to another. If a technician installs a high density filter in this application, it is very likely that the air flow will be reduced because the same filter area is used with a more dense filter.
Answer the following statement true (T) or false (F)