List the three major groups or families of insecticides and one chemical belonging
to each.
What will be an ideal response?
Three major groups or families of insecticides are inorganic compounds (sulfur), organic
compounds (rotenone and pyrethrum), and synthetic organic compounds, which are
further subdivided into chlorinated hydrocarbons (DDT), organophosphates (Parathion,
Malathion), and carbamates (carbaryl/Sevin
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The most important reason for providing ties in a concrete column is to
A) allow the formwork to be tied to the longitudinal bars in the column. B) prevent the buckling of longitudinal column bars. C) increase the shear strength of a column. D) increase the compressive strength of a column. E) Ties are generally not provided in a concrete column.
The space where the ends of the piston ring come together when the ring is installed in the cylinder is MOST-Likely referred to as a(n):
A. flywheel B. end gap C. oil gap D. flexplate
How can a plant be preserved so that it can be sent away for identification?
What will be an ideal response?
When joining grooved pipe, which step is performed immediately after the housing is installed?
a. Apply lubricant to the gasket. b. Install the gasket over the pipe end. c. Center the gasket between the grooves on each pipe. d. Insert the remaining bolt and nut.