The cover board generally used between a single -ply roof membrane and rigid board insulation is
A) specially treated perlite board.
B) iso board.
C) extruded polystyrene board.
D) glass-fiber-reinforced gypsum board.
E) none of the above.
D) glass-fiber-reinforced gypsum board.
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A handheld power unit that can be used for cutting threads, driving hoists and winches, and operating large valves, is the _____.
a. beveler b. portable power drive c. nibbler d. cutoff machine
What does a variable timing device such as Econovance allow an ECM managing a Bosch 8500 injection pump to control?
A. exact moment of ignition B. injection timing advance C. centrifugal timing advance D. engine cylinder pressure
Which class of organic toxins is often intentionally applied to soils?
A) refrigerants B) preservatives C) pesticides D) fuels E) plasticizers
Which torch type would be the best choice for a brazing project?
A) Air-fuel torch B) Air-MAPP swirl-tip torch C) Oxyacetylene torch D) Air-propane swirl-tip torch