Within an air space (cavity), the mode of heat transfer is primarily by
A) conduction.
B) radiation.
C) convection.
D) both A and B.
E) both B and C.
E) both B and C.
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A standard welding symbol and weld symbols have been developed by the American Welding Society (AWS).
Answer the following statement true (T) or false (F)
The most commonly used material for floor sheathing in a wood light-frame building is
A) 1 × 4 lumber. B) gypsum board panels. C) high-density fiber board panels. D) OSB panels. E) high-density fiber board panels laminated to gypsum board.
The static pressure in a duct is the total pressure less the velocity pressure.
Answer the following statement true (T) or false (F)
When using portable electric tools with metal cases, you should:
A) Always use a GFCI receptacle or GFCI adapter. B) Lubricate the tool plug before plugging it in. C) Use as long an extension cord as possible. D) Always make sure you are well grounded.