Describe what an asphalt ductility test measures and how it is conducted.
What will be an ideal response?
The ductility test is used to determine how much an asphalt sample will stretch at various temperatures below its softening point. A standard briquette is molded, brought to the specified test temperature, and pulled at a specified rate until the sample completely separates. The elongation in centimeters, at which the final thread of asphalt breaks, is used to indicate ductility.
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The rule for segmental arch construction is that the minimum rise should always be _____ the width of the opening or span, if the arch is to be self supporting and not on a form.
A. equal to one-eighth B. more than one-fourth C. up to one-half D. no more than one-sixteenth
Three common types of antifreeze are salts, glycols, and ____________________.
Fill in the blank(s) with the appropriate word(s).
The different animals in the kingdom Animalia are broken into smaller groups known as ____________________.
Fill in the blank(s) with the appropriate word(s).
If a 1 M? resistor, 0.47 M? resistor and 0.5 M? resistor are connected in parallel across an 18 V source, what is the total current if the 1 M? resistor opens?
A) 92.3 mA B) 74.3 ?A C) 92.3 ?A D) 74.3 mA