List four factors that must be considered when calculating what size heater is needed to heat a
greenhouse structure.
What will be an ideal response?
type of greenhouse covering, exposed surface area, inside temperature desired, lowest average outside
temperature expected during heating season, wind speed, and condition of covering
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The ____________________ pattern is often used for flat position welds on butt, tee, and outside corner joints, and for buildup or surfacing applications.
Fill in the blank(s) with the appropriate word(s).
Which of the following is defined as the length of time it takes for a wood support exposed to fire to reach an average temperature rise of 121°F or an individual temperature rise of 325°F when the temperature is measured on the plane of the wood nearest the fire?
a. Fire rating b. Finish rating c. Burn rating d. Fireproof rating
A dimension used for general identification, such as stock size or thread diameter, is called ____.
A. dimensional identification B. overall dimensions C. nominal size D. both a and b E. none of the above
This thread form is used for airplane propeller hubs.
A. knuckle thread B. buttress thread C. square thread D. worm thread