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IgorLugansk [536]
4 years ago
13

What is the purpose of guarding electrical equipment with exposed parts operating at 50 volts or more? Select the best option. T

o fulfill lockout/tagout requirements So that only authorized workers can access the equipment To allow easy access to the equipment So that the general public is kept away from construction equipment
Engineering
1 answer:
vodomira [7]4 years ago
7 0

Answer:

So that only authorized workers can access the equipment

Explanation:

Generally, the purpose of guarding electrical equipment that has its parts operating with 50 volts and above is for the safety of the public. Specifically, the guarding is done so that only authorized workers can access the equipment.

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A 800-MW steam power plant, which is cooled by a nearby river, has a thermal efficiency of 40 percent. Determine the rate of hea
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Answer:

Rate of heat transfer to river=1200MW

So the actual amount of heat rejected ti the river will be less as there will some heat loss to surrounding and in pipes

Explanation:

In order to find the actual heat transfer rate is lower or higher than its value we will first find the rate of heat transfer to power plant:

Efficiency=\frac{work}{heat transfer to power plant}

Heat transfer=\frac{work}{Efficiency\\} \\\\Heat transfer=\frac{800}{0.40}\\\\Heat transfer=2000MW

From First law of thermodynamics:

Rate of heat transfer to river=heat transfer to power plant-work done

Rate of heat transfer to river=2000-800

Rate of heat transfer to river=1200MW

So the actual amount of heat rejected ti the river will be less as there will some heat loss to surrounding and in pipes.

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Explanation:

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3 years ago
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