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3 years ago

How deep does electrical conduit need to be buried?

1 answer:

7 0

In general, bury metal conduits at least 6 inches below the soil surface. You may also run them at a depth of 4 inches under a 4-inch concrete slab. Under your driveway, the conduits must be below a depth of 18 inches, and under a public road or alleyway, they must be buried below 24 inches.

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(25 points).The heat is turned on in a building in a cold morning, but the heater does not burnthe natural gas properly and emit

nydimaria [60]

Answer: Yes, it will be around 40ppm(at steady state)

Explanation:

The above question can be solved by performing material balance of CO in the building. The material balance equation is given by, Rate of change of CO in the building = Rate of inflow of CO into the building - Rate of outflow of CO from the blood

5 0

3 years ago

A vacuum gage connected to a chamber reads 35 kPa at a location where the atmospheric pressure is 92 kPa. The absolute pressure

Elodia [21]

Answer:

Absolute pressure= 57 KPa

Explanation:

Given that

Vacuum gauge pressure = 35 KPa

Atmospheric pressure = 92 KPa

We know that

Absolute pressure=Atmospheric pressure + gauge pressure

But we should remember that Vacuum gauge pressure is also called negative gauge pressure.So when given that pressure is vacuum gauge then subtract gauge pressure from atmospheric pressure instead of addition.

So now by putting the values

Absolute pressure=Atmospheric pressure - Vacuum gauge pressure

Absolute pressure=92 - 35 KPa

Absolute pressure= 57 KPa

7 0

3 years ago

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RSB [31]

Answer:

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Explanation:

3 0

3 years ago

Consider the following chain-reaction mechanism for the high-temperatureformation of nitric oxide, i.e., the Zeldovich mechanism

vagabundo [1.1K]

Answer: hello attached below is the properly written chain reaction to your question

answer :

d[NO] / dt = $k_{1f} [O] [N_{2}] + K_{2f} [N][O_{2} ] + K_{3f}[N][OH]$

d[N] / dt = $k_{1f} [O] [N_{2}] + K_{2f} [N][O_{2} ] - K_{3f}[N][OH]$

Explanation:

<u>write out expressions for d[NO] / dt and d[N] / dt</u>

Given :

properly written chain reaction ( attached below)

Expression for d[NO] / dt can be written as

$k_{1f} [O] [N_{2}] + K_{2f} [N][O_{2} ] + K_{3f}[N][OH]$

Expression for d[N] / dt can be written as

$k_{1f} [O] [N_{2}] + K_{2f} [N][O_{2} ] - K_{3f}[N][OH]$

8 0

3 years ago

A W18 X 119 is used as a compression member with one end fixed and the other end pinned. The length is 12 feet. What is the desi

laiz [17]

Answer:

156.0 ksi

Explanation:

The formula of compressive strength is CS = F / A

where F is the force or load while A is the cross-sectional area

Given the inertia Ag = 35.1 in^4 , which is less than 40, the steel has a short column.

E = 29000 ksi

L = 12ft

r = 2.69 in

therefore;

CS = π^2 E / (kL^2/r)^2

= π^2 29000 / (0.8 x 12^2 / 2.69)^2

= 286292.756 / 1834.4089 = 156 ksi

3 0

3 years ago