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Answered on 05/10/2022 Learn Engineering Diploma Tuition
Priya Kumari
Experienced trainer with 9 years of experience in various technology education .
Those who complete the course can go with further study programs such as B. Tech or B.E in Plastic Technology/engineering. Higher education programs such as M. Tech in plastic technology enable the candidates to get into senior job profiles in the related sector.
read lessAnswered on 02/06/2022 Learn Civil Engineering Materials And Construction
Chirag Sharma
with 7 years of teaching experience in Maths and sciencr for class 9th to 12th
Lesson Posted on 14/02/2022 Learn Engineering Diploma Tuition
Sathish Kumar
I am working professional having 8 years of experience in mechanical engineering design and value engineering....
Value Stream Mapping:
Value stream mapping (VSM) is one of the lean manufacturing techniques used to identify waste, reduce process cycle times, and implement process improvement. VSM is, also known as "material and information flow mapping", depicts various work streams and information flows.
A core principle in lean methodology is the removal of waste within an operation. The Lean Manufacturing model recognizes seven types of waste within an operation
To overcome the spotted issues in any production plant, We want a contemporary and comprehensive producing strategy or ways to optimize their performance. Here go some of the better-accepted strategies under lean manufacturing tools.
How to Identify the waste??
What is Non-Value Added Activity?
Operation = Value added Activity + Non Value Added Activity
Value Added = Increases value of production
Non-Value Added = Increases cost of production only.
Kaizen: - It is a tool for improvement and helps to improve our processes. It has got a wide scope of application. Simply defined as "Continuous Change."
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Lesson Posted on 14/01/2022 Learn GATE Coaching
Salmesh
As Electrical Engineers we know that Resistors, Inductors and Capacitors form the most important components in the entire field of study. I will try to explain some basic concepts of inductors and Capacitors here.
Inductors
Capacitors
Lesson Posted on 26/05/2021 Learn Engineering Diploma Tuition
Material Science and Metallurgy
Yogesh Dhage
I am engineer. 10 year of teaching Experience in this field. I am giving home/online/tutor home tuition...
Hello,
I would like to show very first how to visualize the subject. For this, we should have total concentration. To avoid obstacle coming in front of us, we will follow the following steps.
Close your eyes, try to identify any Object.,Whatever it may be and ask the following questions yourself.
This is a reverse engineering way of learning and teaching,
Eg.
These all things you will get from nothing from Material Science and Metallurgy subject. All that complicated things we have to step by in this subject.
I hope you will better understand the importance of this subject.
read lessLesson Posted on 15/03/2021 Learn Civil Engineering Diploma
Tanmoy Mukherjee
I am an experienced, qualified Civil Engineering Teacher and tutor with over 12 years of experience in...
Bar Bending Schedule, commonly referred to as “BBS” is a comprehensive list that describes the location, mark, type, size, length and number, and bending details of each bar or fabric in a Reinforcement Drawing of a Structure. ... In context of Reinforcement bars, it is called bar scheduling.
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Answered on 18/02/2021 Learn Engineering Diploma Tuition
Venkateswara Reddy
Lesson Posted on 26/10/2020 Learn Fluid Mechanics and Machinery
Calculating Frictional Pressure Drop in Pipelines
Goutam Das
-Retired Mechanical Engineer -Strong in Mathematics -Long practical experience -Worked mainly in Power...
Introduction
Very frequently, we need to calculate frictional pressure drops in pipelines. Many of us may have domestic pumps in our households. After we estimate the pump flow from expected consumption of water, we need to calculate the pump head for purchasing a suitable pump. The following is an example of calculation of pressure drop when the flow and pipe geomerty is known.
Input Data(assumed)
1. Pipe flow -10 m3/h
2. Fluid-Water at 250C.
3. Pipe material-commercial galvanised carbon steel (absolute roughness ε=0.15 mm)
4.. Flow geometry as below(total pipe length L=20 m).
h1=3m
h2=12m
Calculation
Step-1 Calculation of flow velocity
From pipe dimension table for 25mm NB std thickness pipe
OD (D)=33.4 mm
Thickness (t)=3.38 mm
Hence ID(d)=D-2t=33.4-2x3.38=26.64 mm=0.02664 m
Pipe flow area (A)=(π/4)d2= (π/4)x0.026642=0.000557 m2
Pipe flow (Q)=10 m3/h=10/3600=0.00278 m3/s
Hence pipe flow velocity(V)=Q/A=0.00278/0.000557=4.98 m/s
Step-2 Calculation of Darcy's Friction Factor(f)
Kinematic viscosity of water(ν)=8.92x10-7 m2/s
Reynold's number (Re)=Vd/ν=4.98x0.02664/8.92x10-7=1.9x105
Re>2000 hence flow is turbulent
For determining f we use Moody's chart s below:
We noe find f from Re and ε/d as follows
Hence f=0.031
Step 3 Calculation Pipe Friction Drop
Total pipe length L=20 m
Minor losses
Minor losses are calculated by K factors. Different K factors are available in the internet(refer Crane Technical Paper 410)
a) Inlet loss-K1=1
b) Foot valve with strainer-pressure drop Δpf1=0.1 bar(assumed)=1x104 Pa
c) Elbows 900 -3 Nos, K2=3x30f=3x30x0.031=2.79
d) Gate valve -2 nos, K3=2x8f=2x8x0.031=0.496
e) Exit loss, K4=1
Total head drop
hf= (fL/D+K1+K2+K3+K4)V2/2g+ Δpf1/ρg (Note :ρ=density=1000 kg/m3)
=(0.031x20/0.02664+1+2.79+0.496+1)(4.982/2x9.81)+1x104/(1000x9.81)
=37.12 mwc
Step 4 Calculation of Pump Head
In addition to frictional head loss we have static head increase
Pump head (H)=(h1+h2)+hf= 3+12+37.12
H=52.12 mwc
We normally take some margin (say 15 %)for future increase in pipe friction drop due to ageing and calculation uncertainties.
So
H=52.12x1,15=60 mwc
Pump details, 10 m3/h flow, 60 mwc head.
read lessAnswered on 26/06/2020 Learn Computer Engineering Diploma
Gaurav
Strive for Excellence.With my knowledge and excellent pedagogy skills you are sure to succeed.
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Lesson Posted on 19/05/2017 Learn Engineering Diploma Tuition
BATTA SHIVAJI
I was completed B.Tech, recently qualified in GATE exam and completed IES coaching in Made Easy center....
BASIC PRINCIPLES IN SURVEYING
PRINCIPLE OF WORKING FROM WHOLE TO PART
Surveying is based on simple fundamental principles which should be taken into consideration to enable one get good results:
(a) Working from the whole to the part is achieved by covering the area to be surveyed with a number of spaced out control point called primary control points called primary control points whose pointing have been determined with a high level of precision using sophisticated equipments. Based on these points as theoretic, a number of large triangles are drawn. Secondary control points are then established to fill the gaps with lesser precision than the primary control points. At a more detailed and less precise level, tertiary control points at closer intervals are finally established to fill in the smaller gaps. The main purpose of surveying from the whole to the part is to localize the errors as working the other way round would magnify the errors and introduce distortions in the survey. In partial terms, this principle involve covering the area to be surveyed with large triangles. These are further divided into smaller triangles and the process continues until the area has been sufficiently covered with small triangles to a level that allows detailed surveys to be made in a local level. Error is in the whole operation as the vertices of the large triangles are fixed using higher precision instruments.
(b) Using measurements from two control parts to fix other points. Given two points whose length and bearings have been accurately determined, a line can be drawn to join them hence surveying has control reference points. The locations of various other points and the lines joining them can be fixed by measurements made from these two points and the lines joining them.
IMPORTANCE OF SCIENTIFIC HONESTY
CHECK ON MEASUREMENTS
ACCURACY AND PRECISION
These terms are used frequently in engineering surveying both by manufacturers when quoting specifications for their equipments and on site by surveyors to describe results obtained from field work.
Horizontal Distance Measurement
One of the basic measurements in surveying is the determination of the distance between two points on the earth’s surface for use in fixing position, set out and in scaling. Usually spatial distance is measured. In plane surveying, the distances measured are reduced to their equivalent horizontal distance either by the procedures used to make the measurement or by applying numerical corrections for the slope distance (spatial distance). The method to be employed in measuring distance depends on the required accuracy of the measurement, and this in turn depends on purpose for which the measurement is intended
Pacing: where approximate results are satisfactory, distance can be obtained by pacing (the number of paces can be counted by tally or pedometer registry attached to one leg). Average pace length has to be known by pacing a known distance several times and taking the average. It is used in reconnaissance surveys& in small scale mapping.
Odometer of a vehicle: Based on diameter of tires (no of revolutions X wheel diameter); this method gives a fairly reliable result provided a check is done periodically on a known length. During each measurement a constant tyre pressure has to be maintained.
Tachometry: -Distance can be can be measured indirectly by optical surveying instruments like theodolite. The method is quite rapid and sufficiently accurate for many types of surveying operations.
Taping (chaining): - This method involves direct measurement of distances with a tape or chain. Steel tapes are most commonly used .It is available in lengths varying from 15m to 100m. Formerly on surveys of ordinary precision, lengths of lines were measured with chains.
Electronic Distance Measurement (EDM): - are indirect distance measuring instruments that work using the invariant velocity of light or electromagnetic waves in vacuum. They have high degree of accuracy and are effectively used for long distances for modern surveying operations.
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