The inside of a conduit installed under a concrete slab at grade level is considered a dry or wet location?
Answers
The inside of a conduit installed under a concrete slab at grade level is considered as a dry location.
The National Electric Code (NEC) defines a wet location as an area that is exposed to moisture or water. Wet locations are at risk of corrosion, degradation, or short-circuit. Since the conduit is placed underground, it is not directly exposed to rain or other forms of moisture that may cause electrical damage. As a result, it is considered a dry location according to the NEC.
NEC Article 100 defines a wet location as a location that is directly or indirectly exposed to water or any other liquid. In contrast, a dry location is one that is not exposed to moisture or liquids that may damage electrical equipment. Since the conduit is not directly exposed to water, it is classified as a dry location. However, it is still necessary to ensure that the conduit is adequately sealed and installed according to the manufacturer's instructions to prevent moisture ingress.
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A conduit installed beneath a concrete slab at grade level is said to be in a wet location. Wet locations are those where water or other liquids may accumulate, but are not immersed in water.
A dry location is an environment where there is no water, steam, or other moisture that can interfere with the electrical devices' successful operation. A damp location is an area where moisture can be present, but no standing water can accumulate to a depth of less than 1 inch, or there is frequent condensation.The National Electrical Code (NEC) defines locations according to the degree of exposure to the elements and moisture. A conduit installed below a concrete slab in a location where water is likely to accumulate is an instance of a wet environment. Conduits should be secured at 3-foot intervals and supported within 12 inches of boxes and fittings to protect against movement. This is to ensure that the electrical wiring remains functional and secured even when placed in a wet location, and it helps to avoid any harm to the person operating the electrical devices.
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Related Questions
Planetary gears require the armature to be offset via a gear housing that holds the starter drive.
Select one:
True
False
Answers
Answer: Due to the way that spur gears work, starters that use them require an offset armature, which is achieved by placing the starter drive in separate gear housing. In starters that use planetary gears, the gears can be contained in an in line drive-end housing.
Explanation: true
what approximations are made in the short transmission line model?
Answers
The short transmission line model is an approximation used to simplify the analysis of power transmission in relatively short transmission lines.
It assumes the following approximations:
Negligible line impedance: The resistance and reactance of the transmission line are considered to be negligible compared to the impedance of the connected devices. This assumption allows us to neglect the line impedance and focus on the impedance of the connected loads.
Uniform line parameters: It assumes that the line parameters, such as resistance, inductance, and capacitance, are constant and uniformly distributed along the entire length of the transmission line. This simplifies the analysis by considering the line as a lumped parameter model rather than a distributed parameter model.
No wave reflections: The short transmission line model assumes that there are no wave reflections occurring within the line. It assumes that the line is terminated with a load that matches its characteristic impedance perfectly, eliminating any reflections.
Lossless line: The model assumes that the transmission line is lossless, meaning that there are no power losses due to resistance or other factors. This simplification is suitable for short transmission lines where losses are relatively small compared to the total transmitted power.
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Elana has opened a new aerobics studio in her area. How might Elana use social media as a market to spread the word about her new studio? Make a list of hashtags that Elana might use to attract interest to her posts.
Answers
Answer:
A list of hashtags that will help Elena's aerobic studio are:
Explanation:
#aerobics #aerobicsstudio #workout #gym #fitness #exercise #burnout #dance #lifestyle #healthylifestyle #yoga #motivation #weightloss #slimfit #health #livinghealthy #cardio #cardiohealth #hearthealth #funworkout #cardiodance #fitnessdance #bodybalance #burncalories #hitworkout
A preheated gray cast-iron casting must be allowed to cool slowly after welding in order to A. retain the ductile properties of the casting. B. prevent the formation of free graphite in the weld metal. C. keep the deposited weld metal on the casting from failing . D. reduce or eliminate residual stresses.
Answers
The option D is the correct answer.
Welding is a process that can cause distortion and internal stresses to a metal, particularly with gray cast iron.
These residual stresses may result in cracking and other issues, which is why preheated gray cast-iron castings must be allowed to cool slowly after welding in order to reduce or eliminate them.
A slower cooling process helps to relieve some of the internal stresses caused by welding.
As a result, the casting is less likely to crack or break as a result of these stresses in the future.
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a transformer is built with 200 primary turns and 50 secondary turns. Whats the transformers turn rate? A) 1:4 B) 2:1 C) 1:2 D) 4:1
Answers
Answer:
\(4:1\)
Explanation:
\(N_p\) = Number of turns of primary coil = 200
\(N_s\) = Number of turns of secondary coil = 50
The transformer turn ratio is given by
\(\dfrac{N_p}{N_s}=\dfrac{200}{50}\)
\(\Rightarrow \dfrac{N_p}{N_s}=\dfrac{4}{1}\)
\(\Rightarrow \dfrac{N_p}{N_s}=4:1\)
The transformer turn ratio is \(4:1\).
An air conditioner operates exactly as a refrigerator; it removes heat from a cold place (a bedroom, for example) and conveys it to a warmer place (usually the outside). Quantities of practical importance in understanding the efficiency of air conditioners are the rate of heat removal and the electric power input to the unit (i.e., the electric energy consumed per unit time). Find an expression for the coefficient of performance KKK of an air conditioner that has a rate of heat removal HHH and a power consumption PPP .
Answers
The expression for coefficient of heat performance is; K = H/P
We are given the expressions;
Coefficient of performance = K
Rate of heat removal = H
Power consumption = P
Formula for coefficient of performance is usually;
K = Q/W
However, the rate of heat removal H can be further expressed as;
H = Q/T
Where;
Q is heat removed
T is time
Similarly, for power consumption, it can also be expressed as;
P = W/T
Where;
W is workdone
T is time taken
Thus, Q = HT and W = PT
Finally;
K = HT/PT
K = H/P
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Which items are NOT found on a
door?*
5 points
Cladding
Moulding
Weatherstrip
Check Strap
Striker
All of the above
None of the above
Answers
Answer:
None of the above cause thats what i put
what ppe is required for workers applying cement, sand, and water mixture through a pneumatic hose?
Answers
Answer:
head and face gear
Explanation:
The required PPE (Personal Protective Equipment) for workers applying a cement, sand, and water mixture through a pneumatic hose includes the following:
1. Safety goggles or face shield: To protect the workers' eyes from dust and any flying debris during the application process.
2. Dust mask or respirator: To protect workers from inhaling harmful dust and particles generated from the cement mixture.
3. Gloves: To protect workers' hands from the abrasive and potentially harmful substances in the cement mixture, as well as from any possible injuries during the operation of the pneumatic hose.
4. Protective clothing: Long-sleeved shirts and full-length pants to protect the skin from cement contact, which can cause irritation or burns.
5. Safety boots: To protect workers' feet from any heavy objects or equipment that may be dropped, and to provide a better grip on slippery surfaces.
6. Hearing protection: Earplugs or earmuffs to protect workers' hearing from the loud noise generated by the pneumatic hose during operation.
Workers are applying cement, sand, and water mixture through a pneumatic hose, they should wear safety goggles, dust masks or respirators, gloves, protective clothing, safety boots, and hearing protection as part of their PPE.
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8.28 Water is the working fluid in an ideal Rankine cycle with superheat and reheat. Steam enters the first-stage turbine at 1400 lbf/in.2 and 10008F, expands to a pressure of 350 lbf/in.2, and is reheated to 9008F before entering the secondstage turbine. The condenser pressure is 2 lbf/in.2 The net power output of the cycle is 1 3 109 Btu/h. Determine for the cycle (a) the mass flow rate of steam, in lb/h. (b) the rate of heat transfer, in Btu/h, to the working fluid passing through the steam generator. (c) the rate of heat transfer, in Btu/h, to the working fluid passing through the reheater. (d) the thermal efficiency.
Answers
Answer:
Betbtybrbytntrnyrnrynunjhjhnthnnhtnnthnhtnnhnhrnntnthhnhnhtnthn
Explanation:
Before contracting to grind engine cylinders to a cross-sectional area of 7 in 2, you need to know how much deviation from the ideal cylinder diameter of c=2.985 in you can allow and still have the area come within 0.01ln 2of the required 7in 2. To find out, you lot A=x( 2x) 2and look for the interval in which you must hold x to make ∣A−7∣≤0.01. What interval do you find? To what intorval must x be held to meet the requirements for the area? inches (Type your answer in interval notation. Round the left endpoint up and the right endpoint down to the nearest thousandth as needed
Answers
The answer to the question is that to meet the area requirements, x must be held within the interval [1.111, 1.521] inches.
The given cylinder diameter is 2.985 in, and the required area is 7 in². The following is how to find the amount of deviation from the ideal cylinder diameter that can be allowed:
Let us assume that the radius of the cylinder is x. The cross-sectional area of the cylinder is given by A = x²π. We can substitute 2x for the diameter since we want to find out the deviation of the diameter from the ideal one, so the formula becomes:
A = (2x)²π.We can express this formula in terms of x by using A = 7 in², so we have:
7 = 4x²π, or x² = 7/4π.Simplifying this expression yields x ≈ 1.316 in.
We are interested in finding the interval in which x should be kept to satisfy ∣A−7∣≤0.01, given that A = x²π. Since A is a continuous function of x, we may use the mean value theorem to get an interval in which x should be kept. Consider f(x) = x²π. Because f(x) is a continuous and differentiable function over (0, ∞), we can use the mean value theorem to show that there exists a value c such that:
f′(c) = [f(b) − f(a)]/(b − a),Where a < b and c ∈ (a, b). The value f′(x) is equal to 2xπ. Thus, we have:
2cπ = [7 − x²π]/(x − 0) or 2cπx = 7 − πx²Solving for x, we get x² + 2c/π x − 7/π = 0, which is a quadratic equation in x.
The equation’s discriminant is:
(2c/π)² + 4(7/π) = 4[c²/π² + 7/π].We must solve the inequality 4[c²/π² + 7/π] ≤ 0.01, which yields 0 ≤ c ≤ 0.205. Thus, to ensure that ∣A−7∣≤0.01, we must keep x within [1.316 − c, 1.316 + c].
The interval is as follows: [1.111, 1.521].
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Which of the following policy actions could the federal reserve use to combat inflation
Answers
\( \huge{ \underbrace{ \overbrace{OPTIONS}}}\)
\( \huge{ \underbrace{ \overbrace{PlEASE}}}\)
Tech a says that the oxygen sensor is part of the feedback system for the engine management system. tech b says that long-term fuel trims that are positive
means that the pcm is leaning out the fuel mixture from the base pulse-width setting who is correct?
o tech a
o tech b
o both a and b
o neither a nor b
Answers
Answer:
Both Tech A and Tech B are correct. The oxygen sensor is indeed a part of the feedback system for the engine management system. The oxygen sensor measures the amount of oxygen in the exhaust gas and sends this information to the powertrain control module (PCM). Based on this information, the PCM can adjust the fuel mixture to ensure that it is optimally balanced for the current driving conditions.
Long-term fuel trims refer to the adjustments that the PCM makes to the fuel mixture over an extended period of time. Positive long-term fuel trims indicate that the PCM is leaning out the fuel mixture by reducing the amount of fuel injected into the engine. This is typically done in order to compensate for a condition that is causing the engine to run rich (too much fuel in the mixture).
Explanation:
Consider diodes in a rectifier circuit. Input voltage is sinusoidal with a peak of +/-10 V. Diode drop is 0.7 V. What is the PIV for each type rectifier 1. 0.7 V 2. 1.4 V 3. 10.7 V 4. 11.4 V Bridge rectifier 5. 19.3 V Full-wave rectifier 6. 8.6 V 7. 9.3 V Half-wave rectifier 8. 7.2 V 9. 12.1 V 10. 12.8 V 11. 10 V
Answers
Answer is given below:
Explanation:
Peak inverse voltage (PIV) can be defined as the maximum value of the reverse voltage of the diode, which is the maximum value of the input cycle when the diode is on. In reverse bias. Happens. 9.3V for braid rectifiers cut at 0.7The center tapered rectifier has 2 diodes in parallel so the maximum voltage is 2Vm so the answer to cut off the 0.7 voltage is19.3V. For a half wave rectifier it is Vm i.e. 10 V.After a strong storm, a worker does not realize that a power transmission line has fallen on his car and is electrocuted while opening the car door. What is this an example of?.
Answers
Answer:
This is an example of the conduction of electricity through metal. Free moving electrons on the car will conduct a electric field when a voltage is applied to the car; in this case the transmission line, and would flow through the metal to the door handle causing electrocution.
what is the symbolic significance of antony meeting with octavius and lepidus in caesars house in the end of act 3
Answers
The meeting between Antony, Octavius, and Lepidus in Caesar's house symbolizes a new era of power and consolidation.
What is consolidation?Consolidation is the process of combining multiple elements into a single, unified entity. This can refer to the merging of several entities into one, or the consolidation of multiple assets, liabilities, accounts, or other financial items into one. Consolidation is often used to reduce costs, streamline operations, and simplify accounting and financial reporting.
Power and consolidation refer to the process of gaining control over a particular area or region. This process usually involves the acquisition of resources, the establishment of political and economic dominance, and the centralization of authority. Power and consolidation occur at all levels, from the individual to the national level.
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onsider a venturi with a throat-to-inlet area ratio of 0.8, mounted on the side of an airplane fuselage. the airplane is in flight at standard sea level. if the static pressure at the throat is 2100 lb/ft2, calculate the velocity of the airplane.
Answers
Which unit is used, when specifying a vehicle's height, length and width?
Meters
Millimeters
Kilometres
Centimeters
Answers
Answer:
Centimeters
Explanation:
What project is this ?
Answers
Answer:
a building project...
Explanation:
A bowl contains 15 red balls, 20 green balls and 12 blue balls. A woman selects balls at random without
looking at them. How many balls must she select to be sure of having at least three balls of the same color?
Answers
Answer:
The answer to this question is 9 balls
In poor weather you should___ your following distance
Answers
A) Describe factor substitution with respect to building heights. Be sure to explain at least two reasons why office buildings (with extra benefits from proximity) tend to "build up" rather than build out. B) A key assumption for being able to model building heights is that building a taller building increases the cost per square foot (the second floor is more expensive to construct than the first floor, ect.) What sort of strange result would we predict if this was not the case? ("Building up" got cheaper per floor with each floor constructed)?
Answers
A) Factor substitution: replacing factors of production for desired outcomes, like building taller or expanding horizontally in limited urban land.
B) Cheaper per floor: no height limit incentive, leading to excessively tall structures and inefficient resource allocation.
A) Factor substitution refers to the decision-making process where factors of production, such as land and capital, are substituted for one another to achieve a desired outcome. In the context of building heights, it relates to the trade-off between constructing taller buildings (building up) versus expanding horizontally (building out).
One reason office buildings tend to "build up" is the limited availability of land in urban areas. Cities often have limited space for new construction, leading to higher land costs. By constructing taller buildings, developers can maximize the utilization of limited land resources and accommodate more office space within a smaller footprint.
Another reason is the benefit of proximity. In urban environments, being close to other businesses, amenities, transportation, and potential clients is advantageous. Building up allows office buildings to take advantage of centralized locations and create a concentration of economic activity. This proximity can lead to increased collaboration, networking opportunities, and accessibility, which are beneficial for businesses.
B) If the assumption that building a taller building increases the cost per square foot were not valid and instead "building up" became cheaper per floor with each floor constructed, a strange result would be observed. In such a scenario, there would be no economic incentive to limit the height of buildings. Developers would have a strong incentive to keep building higher and higher, as each additional floor would cost less per square foot compared to the previous ones.
This could lead to extremely tall buildings with a large number of floors, possibly surpassing the practical and engineering limits. The skyline of cities would be dominated by excessively tall structures, even if there was no corresponding increase in demand or economic justification. The lack of increasing costs per floor would disrupt the typical cost-benefit trade-off associated with building heights and result in an inefficient allocation of resources.
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Identify at least three new and emerging technologies that are used in the electronics and telecommunications industry.
Answers
Answer: See explanation
Explanation:
Emerging technologies are simply referred to as the technical innovations which are done within a particular sector and typically brings about growth to such field or sector.
Some of the new and emerging technologies that are used in the electronics and telecommunications industry include:
1. Digital scent technology - This is a technology that is used for the sensing and the transmission of digital media such as video games, music etc that are event enabled.
2. Electronic nose - This refers to an electronic sensing device which is used in the detection of flavors.
3. Ambient intelligence - It is an electronic environments which shows sensitivity when there are people.
A pitot tube is mounted in the test section of a low- speed open- circuit subsonic wind tunnel. Air is flowing through the test section at 100 mph. The air pressure in the test section is 1 atm, and the temperature is 65 F Calculate the pressure measured by the pitot tube.
Answers
Answer:
given
i=100mph
to=65 F
find thd p
p=i*f
p= 65*100=6500
If the bucket and its contents have a total weight of 20 lb, determine the force in the supporting cables DA, DB, and DC.
Answers
The force in each of the supporting cables DA, DB, and DC is 10/3 lb.
To determine the force in the supporting cables DA, DB, and DC, we need to consider the weight of the bucket and its contents and the angles at which the cables are supporting it. Let's assume that the bucket is being supported by three cables, each at an angle of 120 degrees from each other.
First, we need to calculate the weight of the bucket and its contents. Let's call this weight "W". We know that the total weight of the bucket and its contents is 20 lb, so:
W = 20 lb
Next, we need to find the vertical component of the weight, which is the weight that is being supported by the cables. This is given by:
Vertical component of weight = W * cos(60 degrees)
where cos(60 degrees) = 0.5.
So, the vertical component of the weight is:
Vertical component of weight = W * 0.5 = 10 lb
Now, we can use the principle of equilibrium to find the forces in the cables. The principle of equilibrium states that the sum of the forces acting on an object in equilibrium (i.e. not moving) is zero.
Let's assume that the tension in cable DA is T1, the tension in cable DB is T2, and the tension in cable DC is T3. Then, we can write:
T1 + T2 + T3 = 10 lb
We also know that the tensions in the cables are equal, since the bucket is being supported at equal angles. So:
T1 = T2 = T3
Substituting this into the equation above, we get:
3T1 = 10 lb
So:
T1 = T2 = T3 = 10/3 lb
Therefore, the force in each of the supporting cables DA, DB, and DC is 10/3 lb.
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A coil having a resistance of 10 ohms and an inductance of 4 H is switched across a 20W dc source. Calculate (a) time required by the current to reach 50% of its final steady value, (b) value of the current after 0. 5 second
Answers
(a) The time constant of the circuit can be calculated as:
τ = L/R = 4/10 = 0.4 seconds
At t = τln(2), the current will have reached 50% of its final steady value. Therefore:
t = τln(2) = 0.4ln(2) ≈ 0.277 seconds
(b) The current in the circuit can be calculated using the formula:
i(t) = (V/R)(1 - e^(-t/τ))
At t = 0.5 seconds, we have:
i(0.5) = (20/10)(1 - e^(-0.5/0.4))
≈ 1.98 amps
Therefore, the value of the current after 0.5 seconds is approximately 1.98 amps.
Technician A says that the refractometer reading is determined at the point of the scale where the dark and light areas meet. Technician B says that the reading is determined by where a dial points on a scale. Who is correct
Answers
Answer:
Technician B says that the reading is determined by where a dial points on a scale.
Explanation:
A refractometer is a devise used by scientists to gauge a liquids index of refraction.
The refractive index of a liquid is the ratio of light velocity of a specific wavelength in air to its velocity in the substance in evaluation.
The steps of reading a measurement are;
point the front of the refractometer towards the light source and view into the eyepieceYou will see the line outlined at a different point on the refractometer's internal indexRead the point on the index at which the line falls
1. Find the center, radius and interval of convergence of the following series
a) sum n = 1 to ∞ (3 ^ (n + 1) * (x - 7) ^ n)/n
b) sum n = 1 to ∞ (2 * (4x + 1) ^ n)/(n ^ 2)
d) sum n = 1 to ∞ ((- 1) ^ (n + 1) * (x - 1) ^ n)/n
e) sum n = 1 to ∞ (2 ^ n * (4x - B) ^ n)/n
c) sum n = 1 to ∞ ((- 1) ^ n * (x - 2) ^ (2n + 1))/n
2. Find the power series representation for the following functions and determine their interval of convergence
a) f(x) = (x ^ 3)/(x + 2)
b) f(x) = (x ^ 2)/(a ^ 3 + x ^ 3)
3.) Find the Maclaurine series of the following functions.
a) f(x) = e ^ (3x)
b) f(x) = 2x ^ 3 * e ^ (- 2x ^ 2)
4. Use the binomial series and expand the given function as power series.
a. f(x) = 1/((1 + x) ^ 3)
b. f(x) = 1/((3 + x) ^ 4)
c. f(x) = (2x - 3) ^ 4
Answers
For each part (a-e), you need to determine the center, radius, and interval of convergence of the given power series. This involves using the ratio test or root test to check for convergence and applying the formulas for the center and radius of convergence.
In part (a), you need to find the power series representation of the function (x^3)/(x+2) by expressing it as a geometric series and finding its interval of convergence. Similarly, in part (b), you need to represent the function (x^2)/(a^3 + x^3) as a power series.
For each part (a-b), you need to find the Maclaurin series expansion of the given functions. This involves finding the derivatives of the function at x = 0 and using the formulas for the Maclaurin series coefficients.
In each part (a-c), you are required to expand the given function using the binomial series. This involves applying the binomial theorem to expand the function as a power series.
It is recommended to use mathematical software or a programming language such as MATLAB or Python to perform the necessary calculations for these problems.
A company wants to develop audio speakers using an inexpensive type of plastic that has a very high quality of sound output. Which customers would most likely give a high evaluation of this product?
Answers
Answer:A
Explanation:
Those who want to save money and will use the product for only a few years
Answer:
THE ANSWER is A - those who want to save money and will use the product for only a few years
Explanation: Got it right on edg 2021
the ________ domain is used by educational institutions and is usually reliable but may have individuals that create web pages that do not reflect the values of the school.
Answers
Although most users of the. edu domain are trustworthy, it is possible for certain people to construct websites that do not adhere to the institution's principles.
Which three formal institutions are there?In particular, we cover three formal institutions—formalization, effective rule enforcement, and federalism—as well as three informal institutions—corruption, political ideology, and culture—that are reflected in both the current red flag literature (e.g., Bozeman 2000; Bozeman and Feeney 2011)
How is an institution created?An institutes is a type of social gathering were youths get together to work and where their behavior and lifestyle are shaped.An institution serves a function. Institutions don't vanish when a person quits them as they are permanent. Laws dictating how people should act can be enforced by institutions.
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1. Why is the perfect elastic-plastic model adopted in steel design?
Answers
Answer:
Explained below
Explanation:
Perfect Elastic Plastic in steel design is simply a method whereby the structural members are selected using the criteria of the overall ultimate capacity of the system. However, when safety is considered, the applied loads are usually increased by factors of safety as prescribed in the relevant steel design codes. Therefore, this model of design is just based on the yield capacity of the steel.