How are hole sizes generally dimensioned on a print and identify the symbol used with dimensioning hole sizes.
What will be an ideal response?
Hole sizes are dimensioned with a leader
and note or extension and dimension lines in the view where the hole
appears as a circle, or dimensioned in a sectional view. The diameter
symbol (Ø) precedes all dimensions for circular features.
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Which of the following may be used as CV joint boot material?
A) Hard thermoplastic B) Silicone rubber C) Natural rubber D) All of these are used as boot materials
Hot water has all of the following characteristics except:
a. Hot water dissolves a little bit of everything it comes in contact with. By the time the hot water returns to the tower it is full of suspended solids. b. Hot water also has a tendency to become corrosive and deposit forming. c. When hot water enters the cooling tower laced with suspended solids it undergoes evaporation. This process removes water and leaves the solids. The remaining fluid concentrates in the basin. Over time this concentration will build up to levels that must be controlled. d. Increases oxygen level in the water raising pH levels.
Fowl typhoid mainly affects birds _____ weeks of age and older
a. 6 c. 10 b. 8 d. 12
One of the broad classifications of fittings, ____, are generally used in applications requiring small-diameter pipe of 2.5 inches or less.
A. beveled fittings B. flanged fittings C. welded fittings D. screwed fittings