Why does excess combustion air reduce combustion efficiency?
What will be an ideal response?
Excess air reduces the flame temperature, thus lowering combustion efficiency. However, some excess air is necessary for complete combustion.
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What two rules apply when selecting indoor plants?
What will be an ideal response?
What indicates that a weld is to be continuously around an object?
A. adding a small square between the reference line and the leader line B. adding a small circle between the reference line and the leader line C. adding a small rectangle between the reference line and the leader line D. adding a small triangle between the reference line and the leader line
What measure should be taken to prevent concealed condensation?
What will be an ideal response?
Soil nailing refers to
A) a cut face of excavation supported by closely spaced steel bars and shotcrete over WWR. B) a cut face of excavation supported by closely spaced steel bars and shotcrete. C) a cut face of excavation supported by closely spaced steel bars in grouted holes and shotcrete over WWR. D) a cut face of excavation supported by closely spaced steel bars or angles. E) none of the above.