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Zinaida [17]
3 years ago
15

Tech A says that proper footwear may include both leather and steel-toed shoes. Tech B says that when working in the shop, you o

nly need to wear safety glasses if you are doing something dangerous. Who is correct?
Engineering
1 answer:
olga55 [171]3 years ago
6 0

Answer:

Tech A is correct.

Explanation:

If a person is doing something dangerous in a shop, he should wear safety glasses to protect his eyes from danger and also wear leather shoes to protect himself from any electric shock. Leather boots will disconnect a person with direct earth and therefore he can save himself if he gets a electric shock.

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Three parallel three-phase loads are supplied from a 480V (line-line RMS), 60 Hz three-phase supply. The loads are as follows: L
Travka [436]

Answer:

The total system active power P = P_1 + P_2 + P_3 = 34.91 KW

Explanation:

Load 1: Active power P_1 = 20 HP = 14.91kW;

Reactive power Q1 = P tan(\phi)

                               = 14.91\times tan(cos^{-}0.8) = 11.18 kvar


Load 2: Active power P_2 = 20 kW;

Reactive power Q2 = 0 since the load is purely resistive.

Load 3: Active power P_3 = 0 due to purely capacitiveload

           Reactive power Q_3 = -20 Var

a) since all three loads are connected in parallel therefore

    The total system active power P = P_1 + P_2 + P_3 = 34.91 KW

Total system reactive power Q = Q_1 + Q_2 + Q_3 = 11.18 + 0 -20 = -8.82 kVar

Since Q = 0, the power factor is unity.

Supply current per phase is given by

I = \frac{P}{\sqrt{3}V_{L}}

= \frac{34910}{\sqrt{3}\times 480} = 41.99 A

5 0
3 years ago
Free brainlist because im new and i just want to but you have t friend me first
Amiraneli [1.4K]
Okay sure.









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4 0
3 years ago
1 british gallon = .....litres.<br>a:4.546<br>b:3.785<br>c.5.456<br>d.7.385​
solmaris [256]

Answer:

c

Explanation:

I live in britian

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Investigating how slime molds reproduce is an example of applied research.<br> True<br> False
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Explanation:

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Jeff is assembling a rear axle unit. He has all
BartSMP [9]

Answer:

He should read the directions

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