The mass flow rate is 1791.04 kg/s, the air volumetric flow rate is 1462.1 m^3/hr and the duct diameter is 24.91m
a) 1791.04 kg/s
b) 1462.1 m^3/hr
c) 24.91 m
What is Air flow rateAir flow rate refers to the amount of air that is moving through a given area in a specific period of time. It is typically measured in units of volume per unit of time, such as cubic feet per minute (cfm) or cubic meters per hour (m³/hr).
a) To determine the air mass flow rate, we need to know the heat load of the room and the specific heat of air. The heat load is given as 18000 kJ/hr. The specific heat of air is approximately 1.005 kJ/kg·K. To calculate the air mass flow rate, we use the equation:
mass flow rate = heat load / (specific heat x temperature difference)
mass flow rate = 18000 / (1.005 x (27 - 17)) = 18000 / (1.005 x 10) = 1791.04 kg/s
b) To determine the air volumetric flow rate at inlet conditions, we need to know the density of air at 17 °C. The density of air at 17°C is approximately 1.225 kg/m^3. To calculate the air volumetric flow rate, we use the equation:
volumetric flow rate = mass flow rate / density
volumetric flow rate = 1755.37 / 1.225 = 1462.1 m^3/hr
c) To determine the duct diameter for an air velocity of 3 m/s, we need to know the volumetric flow rate, the air velocity and the cross-sectional area of the duct. To calculate the cross-sectional area of the duct, we use the equation:
volumetric flow rate = air velocity x area
Area = volumetric flow rate / air velocity
Area = 1462.1 / 3 = 487.37m^2
To find the diameter of the duct we use the equation
D = 2 * (Area / π)^(1/2)
D = 2 * (487.37 / π)^(1/2) = 24.91m
Therefore, the duct diameter is 24.91 m
Note: These calculations are based on ideal gas laws, Also the density and specific heat of air changes based on temperature and pressure also the velocity also depends on the friction loss in the duct and the air pressure, these calculations are just an approximation.
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the maximum nominal voltage permitted for a luminaire installed in a motel room is ? .
Thermal insulation may be provided in close contact with Type C components.
Thermal insulation is the answer. Insulation is the process of building a barrier between two objects to prevent heat transfer from one to the other by either reflecting thermal radiation or by limiting thermal conduction and convection. Wool, fiberglass, rock wool, polystyrene, polyurethane, goose feathers, and per lite are typical thermal insulators. These thermal insulation materials are true thermal insulators since they are very poor heat conductors. Insulation made of fiberglass. The most widely utilized insulation in recent times is fiberglass. Fiberglass is able to reduce heat transfer because of how it is created, which involves effectively weaving fine strands of glass into an insulation material.
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A cooling and heating system uses two ducts, one that carries hot air and one that carries cold air. The airflows from the ducts meet in a mixing chamber. The device that actually sets the amount of air leaving each duct is the
A damper motor
B. mixing contactor.
C. fan-coll valve.
D. unit ventilator
The main purposes of a Heating, Ventilation and Air-Conditioning (HVAC) system are to help maintain good indoor air quality (IAQ) through adequate ventilation with filtration and provide thermal comfort.
What is Heating, Ventilation and Air-Conditioning Systems?The main purposes of a Heating, Ventilation and Air-Conditioning (HVAC) system are to help maintain good indoor air quality (IAQ) through adequate ventilation with filtration and provide thermal comfort. HVAC systems are among the largest energy consumers in schools. The choice and design of the HVAC system can also affect many other high performance goals, including water consumption (water cooled air conditioning equipment) and acoustics.The national consensus standard for outside air ventilation is ASHRAE Standard 62.1-2010, Ventilation for Acceptable Indoor Air Quality and its published Addenda. This standard is often incorporated into state and local building codes and specifies the amounts of outside air that must be provided by natural or mechanical ventilation systems to various areas of the school, including classrooms, gymnasiums, kitchens and other special use areas.To learn more about heating and ventilation system refers to;
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instead of having a third terminal used for electronic control signals like most transistors, phototransistors use ? as the control input.
Phototransistors use light as the control input instead of having a third terminal used for electronic control signals like most transistors.
Phototransistors are sensitive to light, allowing them to be used in applications where light needs to be detected or converted into an electronic signal. Phototransistors are typically used in motion detection, light detection, and optical communications.
Electronic control signals are digital or analog signals used to control electronic systems and devices. These signals can be used to control the operation of a wide range of electronic devices, such as computers, motors, actuators, and sensors. Electronic control signals can be generated by a variety of devices, including microcontrollers, computers, and logic circuits. The type of signal used will depend on the device that is being controlled and the type of control system it is part of. Examples of control signals include pulse width modulation (PWM), pulse frequency modulation (PFM), and digital control signals.
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For an economic region, summary of a data is given below.
Mean 535
Median 500
Mode 500
Standard Deviation 96
Minimum 220
Maximum 925
5th percentile 400
10th percentile 430
90th percentile 640
95th percentile 720
What can you conclude about the shape of a histogram of this data?
Answer:
Explanation:
Based on the summary of the data given, it can be concluded that the histogram of the data is likely to be right-skewed, or positively-skewed. This means that the majority of the data points will be concentrated to the left of the mean, with values gradually decreasing until the highest value of 925. The mean of 535 is greater than the median and mode of 500, indicating that there are a few values that are higher than the majority of the data points. The 5th percentile (400) and 10th percentile (430) are relatively close to the mode, indicating that the bulk of the data points are concentrated between 400 and 500. The 90th percentile (640) and 95th percentile (720) are relatively close to the maximum of 925, indicating that there are a few values that are much higher than the majority of the data points.
You want to implement a security control that limits tailgating in a high security environment. Which of the following protective controls would you use?
Mantrap
Employ a number of physical security measures to prevent tailgating, including strong physical security measures.
When an unauthorized person enters a guarded location by trailing an authorized person, this is known as tailgating, also referred to as piggybacking. Data breaches and other cyber-attacks may occur as a result of the physical risk posed by tailgating. Tailgaters are intruders with the capacity to cause a lot of harm to a company. According to a 2020 Pokemon Institute report, physical security compromises account for 10% of malicious breaches. Tailgating is when someone illegally enters a building or another restricted area while posing as a real employee, contractor, visitor, etc. Tailgating, or unauthorized physical access, can lead to both cyber-attacks and physical property damage.
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A glulam beam with a manufactured depth of 12 in. at 14% moisture content. assuming common values for estimating dimensional changes, compute the new depth(in inches) of the beam if the moisture content is increased to 35%. assume a 30% fsp and 1% swelling of the green dimensions per 5% in crease in moisture content.
The correct answer is the glulam beam has a manufactured depth of 12 in. at 17% moisture.
The produced depth of the glulam at a moisture content of 14% The dried treated wood blocks had a 12% moisture content. The 4-ply glulam beams were subsequently produced. a 32% moisture content glulam beam with a produced depth of 250 mm. In the radia, the wood contracts or expands by 1% (compared to the green dimensions). If the moisture content is raised to 35, calculate the new depth of the beam using standard assumptions for calculating dimensional changes.
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Complete Question is: A glulam beam has a manufactured depth of 12 in, at 14% moisture content. The FSP is 30%. Assuming common values for estimating dimensional changes, compute the new depth of the beam if the moisture content is increased to 35%. A wood specimen was prepared with actual dimensions of 1 in.
under the right conditions, it is possible, due to surface tension, to have metal objects float on water. consider placing a short length of a small diameter steel (sp. wt. 510 1b/ft) rod on a surface of water. what is the maximum diameter, dmax, that the rod can have before it will sink? assume that the surface tension forces act vertically upward. note: a standard paper clip has a diameter of 0.036 in. partially unfold a paper clip and see if you can get it to float on water. do the results of this experiment support your analysis?
The results of this experiment is d=0.0613ln. The surface tension forces act as vertically upward.
Because water molecules are cohesive, surface tension can be described as the quality of a liquid's surface that permits it to resist an external force. Cohesive interactions between the molecules of the liquid cause the surface tension to form. The molecules have surrounding molecules on each side in the centre of the liquid. Because molecules are pulling on one another equally in all directions, there is no net force.
Write the expression for the steel rod's volume.
[tex]V=(\frac{pi}{4}d^{2})l[/tex]
In this case, d and l stand for the steel rod's diameter and length, respectively.
Create the surface tension force's manifestation.
T=σl
Here, σ represents the surface tension.
The steel rod's weight expression must be actually written.
W=γV=γ[tex](\frac{pi}{4}d^{2})l[/tex]
Two different forces will work on the steel rod to make it float in the water. One is the upward surface tension force acting on the rod from both sides, and the other is the downward weight force.
To find the expression for the diameter, apply the condition for the balance of forces along the vertical direction and insert the necessary expressions.
∑[tex]F_{V}[/tex]=0T+T−W=02T=W2σl=γ[tex](\frac{pi}{4}d^{2})ld=\frac{8sigma}{piγ}[/tex]
Take into account that the water is 600°F in temperature.
σ[tex]=5.03*10^{-3}[/tex] lb/ft
Identify the water's surface tension at [tex]600[/tex] degrees Fahrenheit.
To find the value of the steel rod's maximum diameter, substitute all the necessary values into the expression for the diameter.
[tex]d=0.0613[/tex]in.
The typical paper clip will float in the water since its diameter is smaller than the steel rod's maximum diameter. As a result, the analysis is supported by the experiment's findings.
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fill in the bllank.Texting while driving is dangerous and has cost too many lives. , text messaging makes a crash twenty-three times more likely to happen. , teens who text and drive spend ten percent of their driving time outside their lane. , seventy-seven percent of people still believe that they can safely text while driving.
Answer:
Texting while driving is dangerous and has cost too many lives. According to the National Highway Traffic Safety Administration, text messaging makes a crash twenty-three times more likely to happen. Additionally, studies have shown that teens who text and drive spend ten percent of their driving time outside their lane. Despite these risks, seventy-seven percent of people still believe that they can safely text while driving.
Explanation:
Answer:
Texting while driving is dangerous and has cost too many lives.
✔ For instance
, text messaging makes a crash twenty-three times more likely to happen.
✔ In addition
, teens who text and drive spend ten percent of their driving time outside their lane.
✔ Despite this
, seventy-seven percent of people still believe that they can safely text while driving.
A crate is pulled to the right with a force of 82.0N, to the left with a force of 115N, upward with a force of 565N, and downward with a force of 236N. Find the net force in the x-direction, the y-direction, and total.
The box is being subjected to a net external force that is; 95.21 degrees counterclockwise from the positive x-axis is the direction.
Dimensions: R = 333.36 N
95.21 degrees counterclockwise from the positive x-axis is the direction.
Ours is given; Rightward force; F r = 85N
Leftward force; F l = -115 N (It is negative because on x and y coordinates, left of x-axis denotes approaching negative section)
Upward force; F up = 565 N
Downward force; F dwn = -236 ( (It is negative because on x and y coordinates, down of y-axis denotes approaching negative section)
Let's now calculate the net force acting in the horizontal direction.
ΣF x = 85 - 115ΣF x = -30 N
Similar to the horizontal direction, there are;
ΣF y = 565 - 236
ΣF y = 329 N
θ = -84.79° + 180°
θ = 95.21°
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What accident theory divides an accident into three phases: pre-contact, contact, and post-contact?
The accident theory divides an accident into three phases: pre-contact, contact, and post-contact is the domino theory.
What is the domino theory?The domino theory is a geopolitical theory that holds that changes in democracy in one country have a domino impact on surrounding countries.
The multiple-factor theory examines not just the three domino theory phases—precontact, contact, and post-contact—but also additional elements that influence an accident, such as management, machine, media, and man.
Therefore, the domino theory separates an accident into three phases: pre-contact, contact, and post-contact.
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What does it mean to say that guaranteed maximum-price contracts limit the exposure of owners?
Construction costs cannot exceed a specified limit, ensuring the original estimates must be more accurate.
Construction costs cannot exceed a specified limit, ensuring the original estimates must be more accurate.
Project managers are legally obligated to ensure contractors don’t overcharge, freeing owners from this burden.
Project managers are legally obligated to ensure contractors don’t overcharge, freeing owners from this burden.
Owners only have to pay fair market price for their area, which means contractors can never charge more.
Owners only have to pay fair market price for their area, which means contractors can never charge more.
Contracts are much more complicated, which means there are fewer loopholes that dishonest contractors may exploit.
Contracts are much more complicated, which means there are fewer loopholes that dishonest contractors may exploit.
The agreed-upon maximum price limits the financial exposure of the owner from unexpected or uncontrolled costs.
What does it mean to suggest that contracts with guaranteed maximum prices limit owners' exposure?Guaranteed maximum-price contracts protect owners from the financial risk associated with unforeseen cost overruns, ensuring that the total cost of the project does not exceed the predetermined amount.Guaranteed maximum-price contracts provide owners with an added layer of protection against unexpected and costly construction overruns. With such contracts in place, the contractor is obligated to ensure that the total cost of the project does not exceed a previously agreed upon maximum amount.This limits the exposure of owners, as they will not be required to pay any more than the specified amount. Furthermore, project managers are legally obligated to ensure that the contractors do not overcharge, thus freeing the owners from this burden.Additionally, the owners will only have to pay a fair market price for their area, meaning that contractors cannot charge more. Finally, the contract is much more complicated, thus reducing the possibility of dishonest contractors exploiting any loopholes.In summary, guaranteed maximum-price contracts provide a safe and secure environment for owners and limit their potential exposure to unexpected and costly overruns.To learn more about Guaranteed maximum-price refer to:
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A type of heating and air conditioning system that relies only on heated or cooled water to adjust the air temperature is known as a
A. feedback
B. hydraulically controlled
C.hydronic
D. wet
system.
A type of heating and air conditioning system that relies only on heated or cooled water to adjust the air temperature is known as a hydronic. The correct option is C.
What is an air conditioning system?The process of creating and maintaining specific temperatures, relative humidity, and air purity conditions in indoor environments is known as air conditioning. This procedure is commonly used to maintain a level of personal comfort.
A hydronic HVAC system transfers energy throughout the structure by using water as the principal fluid.
Therefore, the correct option is C. hydronic.
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a low-pass filter has a cutoff frequency of 32 mhz. what is the fastest rise time that a rectangular wave that will pass through the filter can have?
The cutoff frequency of a low-pass filter is 32 MHz. The quickest rising time a rectangular wave may have and still pass through to the filter is 15 ns.
What is the purpose of a low-pass filter?Low-pass filters can be found in audio amplifiers, integrators, and speakers and are utilized for things like pro government, reconstruction, and speech processing. Bandpass, band-stop, and notched filters can all be created by combining low-pass and high-pass filters.
What is the low-pass filter used for?Another low-pass filter (LPF) seems to be a network that attenuates all signals above its cutoff frequency and only allows signals below it to pass. It is the opposite of an increased filter, which diminishes all sounds below its cutoff frequency while only allowing those below it to pass.
bandwidth distortion,
tr = 0.35/BW
= 0.35/(32×10⁶ )
=15 ns
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rope that is used exclusively for utility rope and is susceptible to abrasion and damage because a large portion of the load-bearing strands are exposed is known as:
Laid rope is rope that is only used for utilitarian purposes and is vulnerable to wear and breakage because a significant amount of the pile strands are exposed.
What rope is the strongest?Nylon is the preferred rope due to its outstanding strength and exceptional stretching properties. Nylon, which is more durable than either of the manila and polypropylene, is frequently used to draw the largest weights and support the most weight.
What rope is the softest?Since cotton is the smoothest of all fibers, it is perfect for use when rope wear is a concern. It is perfect for a wide range of tasks thanks to its softness, especially for things like handrail décor.
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True or False: Data Scientists would perform a cluster analysis when they know what they are looking for and just need to confirm their assumptionsAssuming K=3, how would the point X be classified using KNN?Select one:a. Redb. Blue
Answer: a. Red
Explanation:
1. Data Scientists would perform a cluster analysis when they know what they are looking for and need to confirm their assumptions. ==> True
2. Assuming K=3, how would point X be classified using KNN? ==> Red
the primary difference between integrated/concurrent engineering development and functional/sequential development is:
Integrated development invests more money upfront to make savings later on. Sequential development covers the stages of development more thoroughly.
An integrated development environment (IDE) is a piece of software that offers computer programmers a full range of tools for creating software. A build automation tools and a source code editor are typically included in an IDE. SharpDevelop is an example of IDEs that lacks the requisite compiler, interpreter, or both. Other IDEs, such as NetBeans and Eclipse, do.
A version control system or numerous tools to make the creation of a graphical user interface (GUI) simpler may be included, blurring the line between an IDE and other components of the larger development environment. For usage in object-oriented software development, a class browser, an object browser, and a class hierarchy diagram are also common features of contemporary IDEs.
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floor mounted equipment must have legs that are at least how tall
For indoor moist settings where walls are routinely washed, an exposed wire system must be mounted.
For indoor wet situations with frequently cleaned walls, exposed wire systems must be installed with at least a 6 mm (1/4 in.) air gap between the mounting surface and the electrical equipment. This is done to stop water from getting inside the electrical components and shocking users. Since the air gap acts as a barrier between the electrical equipment and the wet walls, it helps prevent shocks. A cabling system is what? Is a group of cables and related hardware that is used to physically connect two or more systems. Additionally, it is used to transmit data between computers and other networked devices like modems and printers. Among the cabling systems is Wireless Copper Fiber Optic.
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A "wet" combustion test kit measures which two substances?A. Soot and carbon monoxideB. Carbon dioxide and oxygenC. Carbon monoxide and oxygenD. Carbon monoxide and carbon dioxide
The correct response is B. Carbon dioxide and oxygen. A "wet" combustion test kit measures Carbon dioxide and oxygen.
One carbon atom is covalently doubly linked to two oxygen atoms in every carbon dioxide molecule, giving it the chemical formula CO2. At room temperature, it exists in the gaseous state. Carbon dioxide functions as a greenhouse gas in the atmosphere by being transparent to visible light while absorbing infrared radiation. As of May 2022, it was a trace gas in the Earth's atmosphere, up from pre-industrial levels of 280 parts per million (ppm), or roughly 0.04% by volume. These elevated CO2 concentrations and climate change are mostly brought about by the burning of fossil fuels. Groundwater, lakes, ice caps, and ocean all contain carbon dioxide because it is soluble in water. Ocean acidification is brought on by the formation of carbonate, primarily bicarbonate (HCO 3), when carbon dioxide dissolves in water.
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(a) Write a monitor to implement a bounded stack, b_stack, which may contain at most max elements. The push and pop operations behave as follows: stack.push(x): If the stack is not completely full, the operation pushes the new element x on top of the stack. Otherwise, the operation has no effect and the value of x is discarded. stack.pop(x): If the stack is not completely empty, the operation removes the value currently on top of the stack and returns the value in the variable x. If the stack is empty, the operation waits until a value has been pushed on the stack and then completes the pop.
A monitor is implemented as a BCPL procedure, and any associated operations are declared as additional procedures inside the monitor. Prior to the procedure declarations, condition variables, initialized in the monitor body.
While smart TVs have special technology built in to improve picture quality, a smart monitor is smaller, so picture quality will still be sharp and clear. For games and watching movies, you also have a variety of viewing angles. A monitor is especially useful when there are several people involved in the adult's life or named in the Agreement. Meeting scheduling and information exchange can be facilitated by the monitor. If there is already tension or dispute between any of the persons involved, a monitor is also crucial. Monitors display data that has been processed by the computer's video card. Output is the term used to describe the processing outcome displayed on the monitor. The output gives you immediate feedback by displaying text and graphic pictures while you work or play.
A monitor to implement
monitor bounded_stack
buffer[max] // may contain at the most, max elements
full_slots = 0; // 0 < full_slots < max
condition notempty, notfull
deposit(x) {
if (full_slots == max) notfull.wait // or discard
stack.push(x)
full_slots = full_slots + 1
notempty.signal
}
remove(x) {
if (full_slots == 0) notempty.wait
stack.pop(x)
full_slots = full_slots - 1
notfull.signal
}
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what polarity must be connected to the collector, base, and emitter of an npn to make it forward biased?
A positive voltage must be applied to the PNP's emitter, and a negative voltage must be connected to its collector. To forward bias the transistor, the base must be linked to the same polarity as the collector.
For the transistor to operate in the active state, the emitter base junction must be forward biassed and the collector base junction must be reversed biassed. Since the first junction is forwardly biassed, the bulk of the current flows through it and travels to the base, while the second junction needs to be reversely biassed in order to reach the collector. the junction that is forward-biased in an NPN transistor. Electrons leave the negative terminal of the battery and enter the N material as the emitter-to-base junction is biassed forward in the figure (emitter). When the transistor's base collector and emitter base junctions are both forward biassed, the area is said to be saturated.
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2-5-9 Two different fuels are being considered for a 1 MW (net output) heat engine which can operate between the highest temperature produced during the burning of the fuel and the atmospheric temperature of 300 K. Fuel A bums at 2500 K, delivering 50 MJ/kg (heating value) and costs $2 per kilogram. Fuel B burns at 1500 K, delivering 40 MJ/kg and costs $1.50 per kilogram. Determine the minimum fuel cost per hour for (a) fuel A and (b) fuel B.
At 2500 K, Fuel A is ineffective, producing 50 MJ/kg (heating value), and costing $2 per kilogram. Fuel B costs $1.50 per kilogram, burns at 1500 K, and produces 40 MJ/kg.
What does "heat engine" mean?A thermal engine is a machine that uses heat to generate power. It draws heat from a tank, uses that heat to produce work, such as move a piston or lift weights, and then releases that thermal energy into the drain.
What is the heat engine's operating principle?A temperature engine is a machine that generates work using thermal energy. A warm and a cold reservoir's respective temperature differences produce thermal energy. This distinction is used by the heat engine in a thermodynamic process.
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In the feedback pair amplifier (Darlington) of the following figure assume that there is
a resistor (parasitic) between the collector of Q1 and the base of Q2 of 10 Ohms. Find the corresponding formula for IB1 (similar to eq. 4.69). Find the base and collector currents of each transistor, and the base, emitter, and collector voltages of each transistor. Assume that both transistor have been built of silicon. Try to avoid useless approximations.
Explanation:
gkltuijhfryij etikklhggj
what is the occupant load of baseball stadium of 5,550 seats with 2,0000 square feet of standing space?
occupant load of a baseball stadium with 5,550 seats and 2,000 square feet of space. Since 4 is less than 5, the rounding number remains the same. Move 3: 38,496 = 38,000
What is a stadium, exactly?stadium: an enclosure having a wide area for sporting events and other demonstrations with lots of spectator seating. The term is derived from the stade, a Greek unit of length used to describe the length of the first Greek footraces.
Calculation
We get 38,000 when rounded to the nearest thousand.
Step-by-step explanation:
Consider the provided number 38,496 .
Here, we need to round off to the nearest thousand.
The rule of rounding a number is:
If 0, 1, 2, 3, or 4 follow the number, then no need to change the rounding digit.
If 5, 6, 7, 8, or 9 follow the number, then rounding digit rounds up by one number.
Round the number by using following steps:
Step 1: Identify the thousand place and underline it.
38,496
Step 2: Find the right digit to the thousand place. i.e 4
Here 4 is less than 5 so no need to change the rounding digit.
Step 3: 38,496 = 38,000
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if the turn ratio of a step-down transformer is 15:1 and the series impedance (referred to the primary) of j50 ohm. if the no-load primary voltage is 345 kv (line-to-line), and the secondary side is serving a y-connected balance load of 0.667 j0.111 ohms, the real power absorbed by the load (per phase) would be :
if the turn ratio of a step-down transformer is 15:1 and the series impedance C= 3.157 ×10^-3 < -36.87° Ω~¹ D= Is/Ir Since Is=Ir
How do resistance and impedance differ?Voltage split by permeability in a resistor equals resistance. Voltage multiplied by current for just about any component is referred to as impedance. Instead of being referred to as impedance in the context of a resistor, the voltage to current ratio is called resistance.
Calculation
Frequency f=60Hz
Line impedance Z= 12.84 + j72.76 Ω
Then,
The resistance is R=12.84Ω
And reactance is X=72.76Ω
Z=√(12.84²+72.76²)
Z=73.88
Angle = arctan(X/R)
Angle = arctan(72.76/12.84)
Angle=80°
Then, Z=73.88 < 80° ohms
Load voltage is 132 kV
Load power P=55 MWA
Power factor =0.8lagging
the relation between the sending and receiving end specifications are given using ABCD parameters by the equations below.
Vs = AVr + BIr
Is = CVr + DIr
Where
Vs is sending Voltage
Vr is receiving Voltage
Is is sending current
Ir is receiving current
A is ratio of source voltage to received voltage A=Vs/Vr when Ir=0
B is short circuit resistance
B= Vs/Ir when Vr=0
C is ratio of source current to received voltage C=Is/Vr when Ir=0
D is ratio of source current to received current D=Is/Ir when Vr=0
Now,
The load at 55MVA at 132kV (line to line)
Therefore, load current is
Ir= P/V√3
Ir=55×10^6/(132×10^3×√3)
Ir=240.56 Amps
It has a power factor 0.8 lagging
PF=Cosθ
0.8=Cosθ
θ=arcCos(0.8)
θ=36.87°
Therefore, Ir=240.56 <-36.87°
Vr=V/√3
Vr=132/√3
Vr=76.21 kV. Phase voltage
Vr= 76210 < 0° V
For series impedance,
Using short line approximation
Vs = Vr + IrZ
Vs = 76210 < 0° + (240.56 <-36.87° × 73.88 < 80°)
Using calculator
Vs=76210<0° + 17772.5728<(-36.87°+80°)
Vs=76210<0° + 17772.5728<43.13°
Vs=89970.67<7.7°
Also
Is = Ir = 240.56 <-36.87° Amps
Therefore, the ABCD parameters is
A=Vs/Vr
A= 89970.67 <7.7° / 76210 <0°
A=1.181 <7.7-0
A=1.18 <7.7° no unit
B = Vs/Ir
B = 89970.67 < 7.7° / 240.56 <-36.87°
B = 347.01 < 7.7+36.87
B= 347.01 < 44.57° Ω
C= Is/Vr = 240.56 <-36.87° / 76210 < 0°
C= 0.003157 <-36.87-0
C= 3.157 ×10^-3 < -36.87° /Ω
C= 3.157 ×10^-3 < -36.87° Ω~¹
D= Is/Ir
Since Is=Ir
Then, D = 1 no unit.
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if a 120v feeder for nonmotor loads feeds a continuous load rated at 20a and a noncontinuous load at 30a, what size overcurrent protective device should be selected
The correct response is that a 60A size overload protection device should be chosen based on the facts provided in the question.
A feeder wire is what?Power delivery from site A to point B within a facility is accomplished using feeder cables. Perfect for supplying electricity to specialized equipment or supplying backup energy service during construction. Typically, main feeder cables link large switchboards and electrical distribution transformers.
What serves as a feeder?Feeders operate machinery inside a plant, "feed" or loading raw materials for the finished product. Usually, they are also in charge of offloading the final goods. They maintain, clean, and test machines for damage.
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the maximum nominal voltage permitted for a luminaire installed in a motel room is ? .
The maximum nominal voltage permitted for a luminaire installed in a motel room is 120 volts.
What is nominal voltage?Nominal voltage is a value given to a circuit or system to conveniently identify its voltage class (for example, 120/240 volts, 300 volts, or 480Y/277 volts). Within a range that allows for the efficient operation of machinery, the actual voltage at which a circuit operates can differ from the nominal voltage.
Nominal simply means to be named. It is not the exact operating or rated voltage. For example, a 240-volt circuit may operate at 235.4 volts instead of exactly 240.0000 volts.
A nominal quantity is typically the quantity by which an item has been named or is generally referred to (for example, length, diameter, or voltage). When describing batteries, modules, or electrical systems, nominal voltage is used as a voltage reference.
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9.
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A(n) _______ mixture will reduce engine power, foul spark plugs, and cause incomplete burning.
A. stoichiometric
B. overly rich
C. extra lean
D. symmetrical
results when an overheated surface in the combustion chamber ignites the air-fuel mixture
prematurely.
A. Detonation
B. Asymmetrical combustion.
C. Hollow combustion
D. Preignition
Abnormal engine combustion is being discussed. Technician A says to find the cause of spark knock or
preignition pinging in the engine, first check the ignition timing with a scan tool. Technician B says if the
check shows engine timing is correct, spark knock is the problem. Who is right?
A. A only.
B. B only.
C. Both A and B.
D. Neither A nor B.
True or False? Diesel fuel can produce more cylinder pressure and vehicle movement than an equal
amount of gasoline.I need a answer Chapter 40
Explanation:
jhdifbjx to just go to j to you too I love you soFill in the blank: Internet search engines are an everyday example of how Boolean operators are used. The Boolean operator _____ expands the number of results when used in a keyword search.
The Boolean operator OR expands the number of results when used in a
keyword search.
Boolean operators are simple words (AND, OR, NOT, or AND NOT) used
For combining keywords, excluding keywords, and productive results.
These operators can greatly reduce or enhance the set of records
returned. Moreover, if we talk about search engines using Boolean operators then these operators allow you to narrow your search
to the most useful results, telling the database that any of your searching terms can be present in the resulting recods.
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Mrs. Brooke owns a robot with an FSM brain. The robot walks from left to right along a paper type containing a sequence of 1’s and 0’s. On each clock cycle, the robot walks to the next bit. An indicator on the robot’s body will light up when the last four bits that it has walked over are, from left to right, 1101. Design the FSM to compute when the robot should indicate a light. The input A is the bit underneath the robot’s legs. The output Y is TRUE when the indicator lights up. a. Sketch a timing diagram for each machine showing the input, states and output as your robot walks along the sequence 111011010. b. Compare Moore and Mealy state machine designs. c. Simulate your design in Multisim using T flip-flop
Two checkboxes: one for the CLOCK signal and one for the Set and Reset signals, can be used to configure any of the flip-flops mentioned above.
How do you draw a timing diagram?(a)In a timing diagram, time moves down the x-axis from left to right, while the y-axis represents the system's many components and their interactions. Timing charts display the duration of each process phase. Make use of them to determine which phases in a process take too long and to look for possibilities for development.
(b)The output of Mealy and Moore machines depends on the input and current state, which is their key distinction from one another. The Moore machine's current output is solely dictated by that condition.
(c)This component can be customized with adjustable CLOCK edge triggering (POSITIVE and NEGATIVE), adjustable level triggering (active LOW or HIGH) for Set and Reset inputs, and adjustable output complementarity.
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Cascade Connection of Two Integrating Amplifiers
Answer:
A Ethos
B Pathos
C Shift
D Understatement
D Overstatement
