What is oil mist and why is it detrimental?
What will be an ideal response?
Oil mist is present in the air of most large machine shops. The mist consists of tiny, almost microscopic, droplets of oil or coolant. High-speed machine tools such as boring mills, grinders, and turret lathes tend to pollute the surrounding air with an oil mist. A single high-speed grinder can give off nearly 38 liters (10 gallons) of coolant oil in the form of mist in an eight-hour period. The oil mist in the air lowers visibility within the manufacturing area and leaves a coating or residue on any surrounding machinery and equipment. In addition, the mist may be the cause of skin and eye irritations, as well as throat and lung ailments among the workers.
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Your trucking company has been asked to transport a huge pile of sand from a pit to a construction site 35 mi. away. The pit and construction site are both within a mile of the same two-lane paved road. The base of the sand pile covers approximately half an acre. Local laws allow only single-axle dump trucks on the highway. Your company has 14 single-axle trucks and drivers available. Estimate the time, in work days, to move the sand.
What will be an ideal response?
Which site has the highest recommended lighting level?
A. roadway B. storage C. parking D. pedestrian
Valves are held in place by ____________________, which should be installed using the manufacturer’s instructions.
Fill in the blank(s) with the appropriate word(s).
How is the refrigeration cycle reversed in a heat pump?
What will be an ideal response?