What is a water-reducing agent (WRA) and what is its function?
What will be an ideal response?
A WRA is a concrete admixture that is added to concrete to increase its slump without the addition of water. Because extra water reduces concrete strength, a WRA effectively increases concrete's strength.
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An isometric sketch has all of its surfaces shown at ____° angles.
A. 15 B. 30 C. 45 D. 60
In order to be made into yarn, cotton fibers have to be:
a. Laid perpendicular into a grid c. Laid parallel in a thin web b. Spread out into a flat, round mass d. Lined up into one long row
The grade of a site is shown by topographic ____ lines.
A. bearing B. interpolation C. grading D. contour
Removal of excessive material from the block or cylinder head during machining can cause valve timing to be ________ on an overhead cam engine
A) Advanced B) Shortened C) Normal D) Retarded