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3 years ago

What organization which fire codes

Engineering

2 answers:

Kipish [7]3 years ago

8 0

Please ❤️ me the answer is primary 2

jek_recluse [69]3 years ago

6 0

In the United States, fire codes are developed primarily by two model code organizations, the International Code Council (ICC) and the National Fire Protection Association (NFPA).

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Giving out 100 coins cuz why not?

inysia [295]

Answer:

Explanation:

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4 years ago

250 hp, 230 V, and speed of 435 r/min DC shunt motor has a nominal full load current 862 A. a. Calculate the total losses and ef

Lostsunrise [7]

Answer:

(a) Losses 11760 watt, Efficiency = 94.06 %

(b) Shunt current 10.21 A

Armature voltage = 222.97 volt

Explanation:

Output of the dc motor 2500 hp

As 1 hp = 746 watt

So output power

$P=250\times 746=186500W$

Full load current = 862 A

(A) Input of the motor is equal to

$=VI=230\times 862=198260W$

Therefore losses = input - output

= 192860-186500 = 11760 watt

Efficiency = $\eta =\frac{186500}{192860}=0.9406$ = 94.06 %

(b) Power of shunt field is equal to

$P_{shunt}=11760\times \frac{20}{100}=2352watt$

So shunt current $I_{sh}=\frac{2352}{230}=10.21A$

So loss due to shunt current $=11760\times 0.5=5880W$

Shunt current is equal to $I_{sh}=\frac{5880}{230}=25.56A$

Armature current $I_a=862-25.56=836.43A$

Power loss due to armature = 11760-5880 = 5880 W

Therefore $I_a^2R_a=5880$

$836.43^2\times R_a=5880$

$R_a=0.0084 ohm$

Emf is equal to $E=V-I_aR_a$

$E=230-836.43\times 0.0084=222.97V$

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4 years ago

Clarisse is an architect. What skills will she apply to integrate her visualized solutions with other aspects such as business a

Allushta [10]

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Explanation:

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4 years ago

) A certain polymer is used for evacuation systems for aircraft. It is important that the polymer be resistant to the aging proc

bonufazy [111]

Answer:

it will be a scattered plot

Explanation:

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2 years ago

An office worker claims that a cup of cold coffee on his table warmed up to 80°C by picking up energy from the surrounding air,

kherson [118]

Answer:

The claim is false and violate the zeroth law of thermodynamics.

Explanation:

Zeroth law of thermodynamics refers to thermal equilibrium among elements. It states that elements which different temperatures will reach the same temperature at the endgame if they are close enough to interact each other. This temperaure is called <em>equilibrium temperature and it is always a intermediate value between the element with highest temperature and the element with the lowest one. So there is no way </em> a cup of cold coffee on a table can warm up to 80°C picking up energy from the surrounding air at 25°C because the cup can only reach a temperature closer to the surrounding air temperature which will be the equilimbrium temperature for that case.

4 0

3 years ago

Read 2 more answers