The tailstock in a lathe machine is known as a dead center. The draft is calculated as the difference between starting and final thickness.
In a lathe machine, the tailstock, also known as a dead center, is an essential component for holding and supporting the workpiece. The draft calculation is a critical aspect of several manufacturing processes, including casting and sheet metal work, and it's the difference between the starting and final thickness of a workpiece. Lastly, deep grinding is a term used to describe a creep feed grinding operation. Creep feed grinding involves a slow, steady feed of the grinding wheel into the workpiece, rather than a quick, reciprocating action. This results in deep, narrow grooves or channels, thus the term 'deep grinding.'
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Find the mean deviation of the set of numbers
(a) 12, 6, 7, 3, 15, 10, 18,5
Answer:
4.25
Explanation:
The mean deviation is how far, on average, all values are from the middle. To do that, we subtract each element from the mean of the elements, take their absolute values, and then divide by the number of elements in the set. Here's the formula: \(\sum\frac{|x-\mu|}{n}\)
Here the mean is 9.5, the count n = 8, so the mean deviation is 4.25
10. What refrigerant is no longer manufactured in the
United States?
Answer:
Freon Refrigerant
Explanation:
As of January 1, 2020 Freon Refrigerant can no longer be manufactured or imported to the United States. This is because R-22 (the principal component in Freon) has been banned in the states. Along with other greenhouse gasses, due to their contribution to damaging Earth’s ozone layer and global warming.
hope this helps:)
Answer:
Freon Refrigerant Is Now Banned in the US
As of January 1, 2020, a once very popular air conditioning refrigerant can no longer be made in or imported into the United States.
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the coil polarity in a waste spark system is determined by the direction in which the coil is wound (left hand rule for conventional current flow) and cant be changed. for example if a V8 engine has a firing order of 18436527 and number one cylinder is on compression which cylinder would be on the exhaust stroke?
A V-8 engine that posses a firing order of 18436572 with number 1 cylinder on compression, the cylinder which would be on the exhaust stroke is number: A. 6.
What is an injector?An injector can be defined as a mechanical device that is designed and developed for the introduction of fuel into the internal combustion system of an engine, especially under pressure.
The types of fuel injection system.In Engineering, there are two (2) main types of fuel injection system and these include the following:
Simultaneous fuel injection.Sequential fuel injection.What is a sequential fuel injection?A sequential fuel injection is typically designed and developed to spray fuel into the internal combustion system of an engine based on the firing order that is configured within it by the manufacturer.
As a general rule, one of the two-paired spark plugs within the internal combustion system of an engine is always designed to have a negative polarity while the other spark plug is designed to have a positive polarity always.
In this context, we can infer and logically deduce that a V-8 engine that posses a firing order of 18436572 with number 1 cylinder on compression, the cylinder which would be on the exhaust stroke is number 6.
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Complete Question:
The coil polarity in a waste-spark system is determined by the direction in which the coil is wound (left-hand rule for conventional current flow) and can't be changed. for example, if a v-8 engine has a firing order of 18436572 and number 1 cylinder is on compression, which cylinder will be on the exhaust stroke?
A. 6
B. 4
C. 8
D. 2
determine the tension in each cable and the components of reaction at d needed to support the load.
Determining the tension in each cable and the components of reaction at d needed to support the load is a complex process that requires careful consideration of various factors. It is important to use appropriate mathematical methods and to take into account all relevant variables in order to arrive at an accurate solution.
This is a complex question that requires a long answer. In order to determine the tension in each cable and the components of reaction at d needed to support the load, we need to take into account various factors such as the weight of the load, the angles of the cables, and the properties of the materials used in the cables.
Firstly, we need to identify the load and the cables that are supporting it. Once we have identified these, we need to draw a free body diagram and apply equilibrium equations to solve for the tension in each cable and the components of reaction at d. This involves breaking down the forces acting on the load and cables into their horizontal and vertical components, and then using these components to solve for the unknowns.
It is important to note that the tension in each cable will depend on the angle at which it is pulling and the weight of the load it is supporting. The components of reaction at d will depend on the forces acting on the structure as a whole and the properties of the materials used in the cables.
1. Plot these two state points on a pressure (ordinate) - volume (abscissa) plane: at state $1, P_1=60 {Bar}, {V}_1=100 {li}$; at state $2, {p}_2=10 {bar}, {V}_2=700 {li}$. Now join them with a single straight line. (a) What will be the pressure and volume of a third state point located on this line and mid-way between the first two state points? (b) From a right triangle using the straight line as the hypotenuse. What will be the pressure and volume of the state point located at the junction of the two legs of the triangle?
(a) The pressure and volume of the third state point located midway between the first two state points will be approximately 35 Bar and 400 li, respectively.
(b) The pressure and volume of the state point located at the junction of the two legs of the right triangle will be approximately 40 Bar and 250 li, respectively.
(a) To find the pressure and volume of the third state point, we can use the concept of linear interpolation. Since the two given state points are joined by a straight line, we can determine the pressure and volume at the midpoint by taking the average of the corresponding values of the two points. Thus, the pressure at the third state point is (60 + 10)/2 = 35 Bar, and the volume is (100 + 700)/2 = 400 li.
(b) In a right triangle, the hypotenuse represents the straight line joining the two state points. By using the Pythagorean theorem, we can calculate the length of the hypotenuse, which corresponds to the pressure and volume at the junction of the two legs. The difference in pressure between the two state points is 60 - 10 = 50 Bar, and the difference in volume is 700 - 100 = 600 li. Treating these differences as the legs of a right triangle, we can calculate the hypotenuse length using the theorem. The pressure at the junction point is given by sqrt((40^2) + (50^2)) = 40 Bar, and the volume is sqrt((250^2) + (600^2)) = 250 li.
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identify the unit of the electrical parameters represented by L and C and prove that the resonant frequency (fr)=1÷2π√LC
Answer:
L = Henry
C = Farad
Explanation:
The electrical parameter represented as L is the inductance whose unit is Henry(H).
The electrical parameter represented as C is the inductance whose unit is Farad
Resonance frequency occurs when the applied period force is equal to the natural frequency of the system upon which the force acts :
To obtain :
At resonance, Inductive reactance = capacitive reactance
Equate the inductive and capacitive reactance
Inductive reactance(Xl) = 2πFL
Capacitive Reactance(Xc) = 1/2πFC
Inductive reactance(Xl) = Capacitive Reactance(Xc)
2πFL = 1/2πFC
Multiplying both sides by F
F * 2πFL = F * 1/2πFC
2πF²L = 1/2πC
Isolating F²
F² = 1/2πC2πL
F² = 1/4π²LC
Take the square root of both sides to make F the subject
F = √1 / √4π²LC
F = 1 /2π√LC
Hence, the proof.
xpress the negative value -22 as a 2's complement integer, using eight bits. Repeat it for 16 bits and 32 bits. What does this illustrate with respect to the properties of sign extension as they pertain to 2's complement representation? 8 bit The 8-bit binary representation of 22 is 00010110. So, -22 in 2’s complement form is (NOT (00010110) + 1) = (11101001 + 1) = 11101010
Answer:
Explanation:
A negative binary number is represeneted by its 2's complement value. To get 2's complement, you just need to invert the bits and add 1 to it. So the formula is:
twos_complement = ~val + 1
So you start out with 22 and you want to make it negative.
22₁₀ = 0001 0110₂
~22₁₀ = 1110 1001₂ inverting the bits
~22₁₀ + 1 = 1110 1010₂ adding 1 to it.
so -22₁₀ == ~22₁₀ + 1 == 1110 1010₂
Do the same process for 16-bits and 32-bits and you'll find that the most significant bits will be padded with 1's.
-22₁₀ = 1110 1010₂ 8-bits
-22₁₀ = 1111 1111 1110 1010₂ 16-bits
-22₁₀ = 1111 1111 1111 1111 1111 1111 1110 1010₂ 32-bits
Which courses might a mechanical engineer take in college
Answer:
Fluid dynamics.
Materials science.
Robotics.
Manufacturing processes.
Thermodynamics and heat transfer.
Environmental science.
Explanation:
What is the impact of age on the tin in the fusible plug?
The impact of age on the tin in the fusible plug is that it can cause the tin to become brittle and lose its ability to function effectively.
Fusible plugs are safety devices installed in boilers to prevent excessive pressure buildup. They contain a core made of tin or an alloy with a low melting point. Over time, the tin can deteriorate due to aging and exposure to high temperatures. As the tin ages, it may lose its ability to melt and release pressure at the desired temperature.
This can compromise the safety of the boiler system, as the fusible plug may not function as intended during an overpressure event. Regular inspection and replacement of fusible plugs are necessary to ensure their reliability and effectiveness in maintaining boiler safety.
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A stratum of clean sand and gravel 30 ft deep is supplied with water from a channel that penetrates to the bottom of the stratum. If the water surface in an infiltration gallery is 4 ft above the bottom of the stratum and its distance to the channel is 100 ft. What is q as a function of hydraulic conductivity?
The value of q as a function of hydraulic conductivity is q = K/B.
The hydraulic conductivity is the capacity of an aquifer to transmit water. The formula for the flow rate through an unconfined aquifer with a constant hydraulic conductivity is given by;
q = Ki(A/L)
Here;
q = flow rate through the unconfined aquifer
K = hydraulic conductivity
A = cross-sectional area of the aquifer
L = length of the flow path
The depth of the stratum of clean sand and gravel is given as 30 ft, while the water surface in an infiltration gallery is 4 ft above the bottom of the stratum. The distance between the infiltration gallery and the channel is 100 ft. Since the infiltration gallery penetrates to the bottom of the stratum, the length of the flow path (L) can be determined as;
L = 100 + 30 = 130 ft
The cross-sectional area (A) of the aquifer can be determined as;
A = (q/B), where B is the width of the flow path. We assume B = 1m.
Now we know that the pressure difference (head loss) between the channel and the gallery is;
h = 30 - 4 = 26 ft
The hydraulic gradient i = h/L = 26/130 = 0.2
Therefore, the formula for flow rate through the unconfined aquifer with a constant hydraulic conductivity is;
q = Ki(A/L)
q = K [(q/B) / L]
q = K (q/B) / 130B
q = Kq / 130
q [130/B] = Kq
q [1/B] = K
Thus, the value of q as a function of hydraulic conductivity is q = K/B.
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when servicing piston rods and pins it is important to always
Answer:
Pistons should be inspected and measured.
Explanation:
to avoid falling objects in construction don't stack materials higher than
Answer:Falling or flying objects on a worksite can expose workers to relatively minor injuries, such as cuts and abrasions, as well as more serious injuries, such as concussions or blindness. Working beneath scaffolds or other areas where overhead work is being performed puts workers at risk from falling objects. Flying objects become a concern when workers are using power tools or performing tasks that involve pushing, pulling or prying.
Explanation:General
Always wear hard hats when work is being performed overhead or when other work conditions call for it.
Stack materials securely to prevent them from sliding, falling or collapsing.
Overhead work
Secure all tools and materials to prevent them from falling on people below.
Use toe boards or guardrails on scaffolds to prevent objects from falling. Alternately, use debris nets or catch platforms to grab falling objects.
Machine use
When working with machines or power tools that can produce flying particles, wear safety glasses, goggles or face shields.
Inspect tools prior to use, and be sure all guards are in place and in good working condition.
Allow only properly trained workers to use power-actuated tools.
Cranes/hoists
Whenever possible, avoid working under moving loads.
Erect barricades and post warning signs at hazardous work zones.
Inspect cranes and hoists prior to use to ensure all components are in good working order, including wire rope, lifting hooks and chains.
Never exceed the lifting capacity of cranes and hoists.
Compressed air
Reduce compressed air for cleaning to 30 psi, and always use proper personal protective equipment and guarding.
Never clean clothing with compressed air.
1. An asbestos pad is square in cross section, measuring 5 cm on a side at its small end, increasing linearly to 10 cm on a side at the large end. The pad is 15 cm high. If the small end is held at 600 K and the large end at 300 K, what heat‐flow rate will be obtained if the four sides are insulated?2. Solve Problem for the case of the larger cross section exposed to the higher temperature and the smaller end held at 300 K.
carolina has been asked to collect a substrate control at the scene of a suspected arson at a house. what should she most likely collect?
She needs to seal and gather these empty bottles. At the scene of suspected arson at a home, Carolina has been ordered to gather a substrate. a carpet remnant that was manufactured in another country.
Which of the following is a substrate control example?An arson scene's floorboards are free of any evidence of accelerants. What circumstances often result in an autopsy being conducted? When a death seems suspicious or unexplained, an autopsy is typically performed.
How does a substrate control work and what does it do?A section of clothing that is close to the crime stain and outside the region suggested by a presumptive test for a particular body fluid could be considered a substrate control; a positive result from a substrate control would not be anticipated.
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Which kinds of cable consists of one or more twisted-pair wires bundled together?
Try answering with a Twisted-pair cable.
Technician A says that some people refer to the blower motor fan
as a squirrel fan. Technician B says that changing the blower fan
speed can be done by using a solenoid. Who is correct?
Tech A
Tech B
Both Techs A and B
ONeither Tech A nor B
Since Technician A says that some people refer to the blower motor fan as a squirrel fan. Technician B says that changing the blower fan speed can be done by using a solenoid. The correct option is option C: Both Techs A and B
What is the fan about?Some people refer to the blower motor fan as a "squirrel fan" because the fan blade is shaped like a squirrel cage. Technician A is correct in this statement.
Therefore, Changing the blower fan speed can be done by using a solenoid. This is an electromagnetic device that controls the flow of electrical current to the fan motor, which in turn controls the fan speed. Technician B is correct in this statement.
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Assume this attempted implementation of a lock: void init(lock_t∗mutex) \{ mutex-> flag=0; // 0 -> lock is available, 1 -> held \} void lock(lock_t∗mutex) \{ while (mutex->flag==1) mutex-> flag = 1 \} void unlock(lock_t *mutex) \{ mutex->flag=0\} Assume 5 threads are competing for this lock. How many threads can possibly acquire the lock? Note: More than one answer. a.1 b.2 c.3 d.4 e.5 Given the following command:prog1 < file1.txt ∣ prog 2 prog3 > file3.txt Please describe the FDs (file descriptors) for each of the programs.
In the case of the student question provided, we are asked to assume an attempted implementation of a lock and determine how many threads can possibly acquire the lock.
The implementation includes three functions: init(), lock(), and unlock(). The init() function initializes the lock to be available with a flag value of 0. The lock() function waits while the flag value is 1, indicating that the lock is currently held by another thread. The unlock() function sets the flag value back to 0, indicating that the lock is available againGiven that 5 threads are competing for the lock, it is possible for up to 4 threads to acquire the lock. The reason for this is that one thread can initialize the lock to be available (flag = 0), and then up to three additional threads can acquire the lock before the flag is set back to 0 by the first thread to release the lock.In the second part of the question, we are given a command (prog1 < file1.txt | prog2 prog3 > file3.txt) and asked to describe the file descriptors (FDs) for each of the programs. File descriptors are used by Unix-like operating systems to represent file-like objects such as input/output files, pipes, sockets, and devices.for more such question on implementation
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A lamp and a coffee maker are connected in parallel to the same 120-V source. Together, they use a total of 140 W of power. The resistance of the coffee maker is 300 Ohm. Find the resistance of the lamp.
Answer:
Resistance of the lamp (r) = 156.52 ohm (Approx.)
Explanation:
Given:
Total power p = 140 W
Resistance of the coffee maker = 300 Ohm
Voltage v = 120 V
Find:
Resistance of the lamp (r)
Computation:
We know that
p = v² / R
SO,
Total power p = [Voltage²/Resistance of the lamp (r)] + [Voltage²/Resistance of the coffee maker]
140 = [120² / r] + [120²/300]
140 = 120²[1/r + 1/300]
140 = 14,400 [1/r + 1/300]
Resistance of the lamp (r) = 156.52 ohm (Approx.)
Two technicians are discussing what it means when you do a scratch cut and get a cut that does not go completely around the circumference. Technician A says that it may represent drum runout. Technician B says that it may represent incorrect mounting on the lathe. Who is right
It is essential to consider both drum runout and mounting issues as potential causes and inspect and rectify them accordingly to ensure accurate and complete cutting during the machining process.
Both Technician A and Technician B could be partially correct.
Technician A is correct in suggesting that a scratch cut that does not go completely around the circumference may indicate drum runout. Drum runout refers to the condition where the surface of the drum is not perfectly round, causing uneven contact between the brake lining and the drum. When performing a scratch cut, if the cutting tool fails to make a complete cut around the drum, it suggests that the drum surface is not uniformly cylindrical, possibly due to drum runout.
Technician B is also correct in stating that incorrect mounting on the lathe can result in a scratch cut that does not go completely around the circumference. If the drum is not mounted securely or centered properly on the lathe, it can lead to an uneven cut. Improper mounting can cause misalignment between the cutting tool and the drum, resulting in an incomplete cut.
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2. a wheel tractor-scraper is operating on a level grade. assume no power derating is required for equipment condition, altitude, and temperature. use equipment data from figure 6.10. a) disregarding traction limitations, what is the maximum value of rolling resistance (in lb/ton) over which the fully loaded unit can maintain a speed of 15 mph? b) what minimum value of coefficient of traction between the tractor wheels and the traveling surface is needed to satisfy the requirements of part a? for the fully loaded condition, 52% of the weight is distributed to the drive axle. the operating weight of the empty scraper is 74,946 lb.
We can see here that the maximum value of rolling resistance over which a loaded scraper can maintain is: 780 lb/ton
What is a maximum rolling resistance?Rolling resistance is the force that resists the motion of a rolling object on a surface. Maximum rolling resistance refers to the highest level of resistance that an object can encounter while rolling on a particular surface.
For a fully loaded condition:
15mph speed, 52% resistanceGrade resistance = 0%The total resistance = (gross + rolling) resistance
52% = 0% - rolling resistance
rolling resistance = 52%
The maximum rolling resistance = rolling resistance percentage × speed
The maximum rolling resistance = 52% (15 lb/ton)/(1% resistance)
The maximum rolling resistance = 780 lb/ton
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Excepted packaging refers to fiberboard boxes, sturdy wooden boxes, or steel crates that are designed to transport:
Excepted packaging refers to fiberboard boxes, sturdy wooden boxes, or steel crates that are designed to transport materials with extremely low levels of radioactivity.
What is excepted packaging?Excepted packaging can be defined as a type of box that is designed and developed for the transportation of materials with extremely low levels of radioactivity.
This ultimately implies that, a type of box which is strictly used for the transportation of materials with extremely low levels of radioactivity in order to prevent hazard.
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All of these are types of wheel alignments EXCEPT:
A) four-wheel.
B) steering angle.
C) two-wheel.
D) thrust angle.
Answer:
thrust angle
Explanation:
good luck.........
1. A wastewater treatment plant (WWTP) releases effluent into a stream with mean depth 2 m and mean velocity 0.75 m/s. The BOD concentration at the WWTP is 15 mg/L, and the oxygen deficit is negligible. The deoxygenation rate in the stream is 0.8 d-1 and the reaeration rate is 1.2 d-1. a) Calculate the BOD concentration and DO deficit at a point 20 km downstream from the WWTP. (10 pts) b) What assumptions are inherent in these predictions (give at least two)
Answer:
A) BOD = 6.51 mg/l , DO = 2.46 mg/l
B) BOD of stream is negligible and DO of stream is at saturation level
Explanation:
Mean depth = 2 m
Mean velocity = 0.75 m/s
Bod concentration at WWTP = 15 mg/L
deoxygenation rate = 0.8 d-1
reaeration rate = 1.2 d-l
a) Calculate the BOD concentration and DO deficit
at 20 km
tc = (20 * 10^3) / (0.75 * 3600 * 24 )
= 0.309 days
\(BOD_{t}\) = lo ( 1 - 10^- 0.8 * 0.309 )
= 15 ( 1 - 10^ - 0.2472 )
= 15 ( 0.434 ) = 6.51 mg/l
DO = ( Kd * lo / Kr ) * 10^ -Kd*tc
= ( 0.8 * 6.51 / 1.2 ) * 10 ^ - 0.8 * 0.309
= 4.34 * 10^-0.2472 = 2.46 mg/l
B) The assumptions are : BOD of stream is negligible and DO of stream is at saturation level
Technician A says ABS systems provide superior directional stability when the brakes are applied while turning a corner. Technician B says ABS systems provide superior braking when driving on loose snow. Who is correct
Both technicians A and B are partially correct, because it's important to note that ABS is not a foolproof solution in all driving situations and should not be relied upon as a substitute for proper driving techniques and caution.Technician A is partially correct in that ABS (Anti-lock Braking System) can improve directional stability. Technician B is also partially correct in that ABS can improve braking performance on loose snow.
Both technicians are partially correct, but neither is entirely accurate.
Technician A is partially correct in that ABS (Anti-lock Braking System) can improve directional stability when the brakes are applied while turning a corner, especially on slippery or uneven road surfaces. The system can prevent the wheels from locking up and skidding, which can cause the vehicle to lose control. However, it's important to note that ABS does not necessarily guarantee superior directional stability in all situations, and the driver should still exercise caution and proper driving techniques when turning.
Technician B is also partially correct in that ABS can improve braking performance on loose snow, as the system can help prevent the wheels from locking up and losing traction. However, other factors such as tire type and condition, road gradient, and vehicle weight distribution can also impact braking performance on loose snow.
Therefore, both technicians are partially correct, but it's important to note that ABS is not a foolproof solution in all driving situations and should not be relied upon as a substitute for proper driving techniques and caution.
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in the bendix rsa fuel injection system, which chamber in the regulator unit will have the lowest air pressure?
In the Bendix RSA fuel injection system, the chamber in the regulator unit that will have the lowest air pressure is typically the reference or atmospheric chamber.
The regulator unit in the Bendix RSA fuel injection system is designed to maintain a constant fuel pressure to the fuel injector nozzles. It does this by controlling the air pressure that acts on the diaphragm, which in turn controls the position of the fuel metering valve. The regulator unit has two chambers - the fuel chamber and the air bleed chamber.
The air bleed chamber is connected to the air intake system and is exposed to the air pressure in the intake manifold. This means that the pressure in the air bleed chamber will vary depending on the engine speed and load. At high engine speeds and loads, the air pressure in the air bleed chamber will be lowered, which will cause the fuel metering valve to open more and deliver more fuel to the engine.
Therefore, the air bleeds chamber in the regulator unit of the Bendix RSA fuel injection system will have the lowest air pressure.
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Q.4.2
Performance or stress testing report will form part of the approval process before the system is deployed into production.
Define time-based performance criteria when conducting performance or stress testing.
Q.4.3
Quality is valued at the University and no project is approved if this aspect cannot be demonstrated.
Define a type of system test that allows business stakeholders to check system functionality against user requirements.
Q.4.4
As stated in the case study, all the databases on Postgres including the back-ups should be encrypted.
Discuss the importance of encryption and distinguish between encryption and decryption in computer security.
Q.4.5 You are going to need to put few architectures in place to meet all the requirements for the Online University Platform.
Distinguish between Technology and Application Architecture.
In order to meet the requirements of the Online University Platform, various architectures need to be implemented. Two important architectural aspects are Technology Architecture and Application Architecture.
Technology Architecture focuses on the hardware, software, and infrastructure components necessary to support the system, while Application Architecture defines the structure and organization of the software applications that form the platform.
Technology Architecture: Technology Architecture encompasses the underlying technological components required to support the Online University Platform. This includes hardware infrastructure such as servers, network devices, and storage systems, as well as software components like operating systems, databases, and middleware. The Technology Architecture ensures that the necessary infrastructure is in place to support the application layer and its requirements. It addresses scalability, availability, performance, security, and other aspects related to the underlying technology stack.
Application Architecture: Application Architecture focuses on the design and organization of the software applications that make up the Online University Platform. It defines how the different modules or components of the system interact with each other, the data flow, and the overall structure of the applications. Application Architecture ensures that the system's functionality aligns with the requirements of the business stakeholders and user needs. It involves defining the software layers, interfaces, protocols, and frameworks used in the system, as well as the overall design patterns and principles.
In summary, Technology Architecture deals with the infrastructure and technology components required to support the Online University Platform, while Application Architecture focuses on the design and organization of the software applications that make up the platform. Both architectures are crucial for ensuring that the system meets the requirements of the project, with Technology Architecture addressing the underlying infrastructure and Application Architecture ensuring the functionality and structure of the software applications.
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With _____, only one criterion must evaluate true in order for a record to be selected and with _____, all criteria must be evaluate true in order for a record to be selected.
a. parameter criteria, double criteria
b. function criteria, IF criteria
c. simple criteria, complex criteria
d. OR criteria, AND criteria
Answer:
d
Explanation:
OR criteria, AND criteria
In an OR criteria, it doesn't need all the records to be true. Just one record is enough and all other criterion becomes true.
In an AND criteria, it's unlike the OR criteria and works in opposite. It needs every member of the record to be true to be able to adjudge the whole record as true.
And as such, we have
With OR criteria, only one criterion must evaluate true in order for a record to be selected and with AND criteria, all criteria must be evaluate true in order for a record to be selected.
A venture tube is used to measure the flow rate of a liquid in a pipe (liquid density is 800 kg/m3). The pipe has a diameter of 10 cm and the smallest diameter of the venture has a diameter of 4 cm. A manometer with a manometer fluid of mercury (specific weight of 133 kN/m3) is used to calculate the flow rate which is connected to the venture section such that one leg is far upstream and the second leg is at the minimum diameter of the venture tube. If the flow rate is 0.05 m3/s determine the elevation change in the manometer fluid.
a. 14.6 m
b. 9.28 m
c. 4.64 m
d. 2.32 m
Answer:
\(\triangle h=4.935m\)
Explanation:
From the question we are told that:
Liquid density \(\rho=800\)
Diameter of pipe \(d=4cm \approx 0.004m\)
Diameter of venture \(d=10cm \approx 0.010m\)
Specific weight of mercury P_mg \(133 kN/m^3\)
Flow rate \(r=0.05 m^3/s\)
Area A:
\(A_1=\frac{\pi}{4}0.1^2\\A_1=0.00785m^2\\A_2=\frac{\pi}{4}0.04^2\\A_2=0.001256m^2\\\)
Generally the Bernoulli's equation is mathematically given by
\(\frac{P_1}{\rho_1g}+\frac{V_1^2}{2g}=\frac{P_2}{\rho g}+\frac{V_2^2}{2g}\\\)
Where
\(V_1=\frac{r}{A_1} \\\\ &V_1=\frac{r}{A_2}\)
Therefore
\(P_1-P_2=\frac{Pr^2}{2}(\frac{A_1^2-A_2^2}{A_1^2A_2^2})\)
Generally the equation for pressure difference b/w manometer fluid is given as
\(P_1-P_2=(p_mg-pg)\triangle h\)
Therefore
\((p_mg-pg)\triangle h=\frac{Pr^2}{2}(\frac{A_1^2-A_2^2}{A_1^2A_2^2})\)
\(\triangle h=\frac{\frac{Pr^2}{2}(\frac{A_1^2-A_2^2}{A_1^2A_2^2})}{(p_mg-pg)}\)
\(\triangle h=\frac{\frac{(800)(0.05)^2}{2}(\frac{(0.1)^2-(0.4)^2}{(0.1)^2(0.04)^2})}{(1.33*10^3-800*9.81)}\)
\(\triangle h=4.935m\)
Therefore elevation change is mathematically given by
\(\triangle h=4.935m\)
True or False? Engineering is a profession that is limited to the United States.
Answer:
No
Explanation:
People work in engineering all over the globe.
QUESTION 4
D
Which of the four strokes of a four-cycle internal combustion engine is the shortest in crankshaft duration?
O A.Power
O b.Exhaust
O c. Intake
O d. Compression
Answer:
The answer will be B i hope this helps