It is best to set plants just before or just after:
a. dawn c. sunset
b. a rain d. a dry spell
B
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GMAW welding uses fully inert ____________________ like argon or helium as a shield gas
Fill in the blank(s) with the appropriate word(s).
Express the tolerance +/- .125 inch in terms of mm. to the nearest 1/100 mm
A) +/- .05 mm. B) +/- 3 mm. C) +/- 3.17 mm. D) +/- 1.25 mm.
What special precautions in holding magnetic workpieces, must be considered in placing these pieces?
A) The workpieces must be wider than they are high B) The workpiece must have the longer length parallel to table travel C) The workpieces must span as many magnetic poles as possible D) Oil should be used to aid in increasing magnetic flux
Answer the following statement(s) true (T) or false (F)
1. The modulus of rigidity is a measure of how easily a material will stretch when pulled or how well the material will shorten when pushed. 2. Concrete is stronger in tension than it is in compression. 3. The coefficient of linear expansion can be used to determine the change in the length (per original length) of a material that would occur if the temperature of the material were changed. 4. The value of heat capacity represents the amount of thermal energy required to raise the temperature of 1 kilogram mass of a material by 1°C. Materials with large heat capacity values are good at storing thermal energy. 5. The lower the viscosity value is, the more resistance the fluid offers to flow.