Which of the following statements about brazing dissimilar metals is incorrect?
a. Always use a phosphorus alloy to braze dissimilar metals.
b. Always use a flux, even when one of the metals is copper.
c. Different metals have different melting points.
d. Different metals expand at different rates.
a
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For exterior mortar, an integral type water proofer should be added to the mortar mix.
Answer the following statement true (T) or false (F)
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What will be an ideal response?
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The National Safety Council recommends all the following do’s when using a ladder except: