What environmental control measure is human-made or natural pits, typically lined with an impermeable, flexible substance or clay?
A. Dike
B. Settling pond
C. Landfill
D. Sand absorption
A. Incorrect. Dikes are containment devices (earthen berms, metal or concrete walls) built around a piece of equipment to contain any liquids should the equipment rupture or leak.
B. Incorrect. Settling ponds may be constructed of concrete or simply earthen pits dug out and lined with a heavy rubber liner.
C. Correct. Landfills are human-made or natural pits, typically lined with an impermeable, flexible substance (such as rubber) or clay.
D. Incorrect. Environmentally harmful liquids must be absorbed by sand or sawdust and placed in drums before disposal.
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A) Accident B) Safety breakdown C) Hazard prevention failure D) Near miss
The ribs and slab of one-way joist slabs are cast _____.
a. continuously b. sequentially c. intermittently d. monolithically
N2 gas fills a flexible container with an initial volume of 0.05 m3, a temperature of 30oC, and a pressure of 800 kPa. The N2 gas is to expand in an isothermal manner until the pressure is 100 kPa.
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If the phase angles of two sine waves are both 0 degrees then the waves _____
a. are in phase b. are 90-degrees out of phase c. have the same peak voltage d. have the same amplitudes