Explain what posttensioning of concrete is.
What will be an ideal response?
Tensioning (i.e., pulling), the prestressing steel (steel tendons) after the concrete has gained strength, is posttensioning.
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While discussing bearing undersizes, Technician A says that undersized bearings are used when a crankshaft is reground. Technician B says that they are used on some new engines to compensate for errors in production. Who is correct?
A. A only B. B only C. Both A and B D. Neither A nor B
During the Middle Ages, the Chinese used ____________________ to control pests on crops
Fill in the blank(s) with correct word
Which of the following statements most accurately describes the bonding requirements for hazardous (classified) locations?
A. Bonding is required from the hazardous location to the control panel. B. Bonding is required from the hazardous location to the panelboard where the branch circuit originates. C. Bonding is required from the hazardous location to the source of the separately derived system. D. If locknuts and bushings are tightened securely, extra bonding is not required in hazardous locations.
Fiberglass, plastic, and ____ sinks are not easily recycled.
A. cast iron B. metal C. solid china D. porcelain