ECE - R2023 - III SEM - EDC STUDY MATERIALS
Model question paper 👇
NSK - TAMILAN ULAGAM
NSK - DIPLOMA
Tuesday, November 12, 2024
SOM - REGULATION 2023 STUDY MATERIALS
SOM VERY VERY IMPORTANT QUESTION BANK 👇
SOM - REGULATION 2023 STUDY MATERIALS
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𝗦𝗢𝗠 𝗜𝗠𝗣𝗢𝗥𝗧𝗔𝗡𝗧 𝗤𝗨𝗘𝗦𝗧𝗜𝗢𝗡 𝗪𝗜𝗧𝗛 𝗔𝗡𝗦𝗪𝗘𝗥'𝗦 ( 𝗧𝗔𝗠𝗜𝗟 & 𝗘𝗡𝗚𝗟𝗜𝗦𝗛) 𝗣𝗗𝗙 👇
DEPARTMENT OF MECHANICAL ENGINEERING
SUBJECT NAME: STRENGTH OF MATERIALS
SUBJECT CODE: 1020233230
SLOW LEARNERS QUESTIONS BANK
UNIT-I
ENGINEERING MATERIALS & HARDNESS TEST
Important Questions (10 Marks)
1. Draw and explain of a Brinell hardness test.
2. Draw and explain of a Rockwell hardness test.
3. Draw and explain of a Vickers Hardness test.
4. Explain construction and working of Shore Hardness Test (Durometer)
UNIT-II
SIMPLE STRESSES AND STRAINS & MECHANICAL TESTING OF MATERIALS:
Important Questions (10 Marks)
1. Explain with neat sketch the testing procedure of the creep on materials.
2. Explain with neat sketch, the testing procedure of the fatigue test on the materials.
3. Explain tensile test of mild steel in UTM with the help of stress, stress diagram.
(Or)
Explain the stress-strain diagram of a mild steel specimen and mark the salient points. (Or) Explain the
behavior of mild steel in tension up to rupture with stress and strain diagram.
4. Find the Young’s modulus of a brass rod of diameter 25mm and of length 250mm which is subjected
to a tensile load of 50kN when the extension of the rod is equal to 0.3mm.
5. A steel rod of 20 mm diameter and 3 m long is subjected to an axial pull of 20 kN. Find the stress,
strain and elongation in the bar, if the modulus of elasticity of the material is E = 2 x 105 N/mm2
.
UNIT-III
ELASTIC CONSTANTS & STRAIN ENERGY
Important Questions (10 Marks)
1. A steel bar 400mm long, 60mm wide, and 15mm thick is subjected to an axial tension of 100kN.
Calculate the final dimensions and change in volume of the bar. Take E = 2 x 105 N/mm2
and 1/m =
0.3.
2. A steel rod 2 m long and 200 mm diameter is subjected to an axial pull of 45 kN. Find the changes in
length, diameter and volume of the rod. Take E = 2 x 105 N/mm2
and 1/m = 0.3.
3. The young’s modulus for a given material is 1 x 105 N/mm2
and modulus of rigidity is 0.4 x 105
N/mm2
. Find the bulk modulus and the lateral contraction of a round bar of 50 mm diameter and 2.5 m
long when stretched by 2.5 mm.
4. A bar of length 150 mm is 50 mm in diameter. It is subjected to an axial pull of 400kN. The extension
in length and contraction in diameter were found to be 0.25mm and 0.02mm respectively. Determine
the values of elastic constants.
5. A weight of 1400N is dropped onto a collar at the lower end of a vertical bar 3m long and 25mm in
diameter. Calculate the height of drop, if the maximum instantaneous stress produced is not to exceed
120N/mm2
. Take 0.2 x 106 N/mm2
.
6. A wagon weighing 50KN attached to a rope traveling down a slope at speed of 3m/sec. If it’s suddenly
stopped by pulling a rope, what is maximum instantaneous stress and tension induced in the rope due
to stopping? Assume the length and areas of the rope are 150m and 2000mm2 respectively .Take E=1 x
105N/mm2
.
UNIT-IV
TORSION & MATERIAL TESTING
Important Questions (10 Marks)
1. Explain the construction and working of torsion testing machine with a neat sketch.
2. The shaft running at 180rpm has to transmit 100KW the shaft should not be stressed beyond 60N/mm2
and should not twist more than 10
in a length of 3m select a suitable diameter of shaft. Take N=0.8 x
105N/mm2
.
(Or)
A solid shaft is transmitting 100kW power at 180rpm. If the allowable stress in 60N/mm2
, find the
necessary diameter for the shaft. The shaft is not to twist more than 1° in a length of 3m. Take C =
80kN/mm2
.
3. A solid shaft 20mm diameter transmit 10KW at 1200rpm. Calculate the maximum intensity of shear
stress induced and angle of twist in degree in a length of 1m .if the modulus of rigidity for the shaft
material is 8x104 N/mm2
4. A hollow shaft having inner diameter 0.7 times outer diameter is to replaced by s solid shaft of a same
material is to transmit 500KW at 200 rpm with a permissible shear stress is 80N/mm2
, calculate the
percentage saving in material.
5. A hollow circular shaft of external diameter 75mm and internal diameter 40mm is to transmit power at
a speed of 40rpm if the maximum shear not to be exceed 80N/mm2
calculate the power in KW
transmitted by the shaft.
UNIT-V
SPRINGS & THIN CYLINDERS
Important Questions (10 Marks)
1. Find the diameter of the wire, diameter of the coil and number of turns of a closely coiled helical
spring of stiffness 20N/mm deflection. The maximum shear stress in the spring metal is not to exceed 80N/mm2 under a load of 600N. The diameter of the coil is to be 10 times the diameter of wire. Take N
=85 KN/mm2
.
2. A closely coiled helical spring made of steel wire 10 mm diameter has 15 coils of 100 mm mean
diameter. Calculate the deflection under an axial load of 200N. What is the stiffness of the spring?
Take C = 9 x 104 N/mm2
.
3. A close coiled helical spring has the stiffness 40 N/mm. Determine the number of coils when the
diameter of the wire is 10mm and mean coil diameter is 80mm. N = 0.8 x 105 N.mm2
. (Answer: n =
4.88 say 5 coils)
4. A truck weighing 30KN and moving at 5km/hr has to be brought to rest by buffer .find how many
springs each of 18coils will be required to the energy of motion during a compression of 200mm.the
sprigs made out 25mm diameter of steel rod coiled to a mean diameter 240mm take N=0.84 x
105N/mm2
.
5. Weight of 150 N is dropped onto a compression spring with 10 coils of 12 mm diameter closely coiled
to a mean diameter of 150mm. if the instantaneous contraction is 140mm, calculate the height of drop.
Take C = 0.8 x 105 N/mm2
.
6. A water main 1.5 m diameter and 15 mm thick is subjected to an internal pressure of 1.5 N/mm2
.
Calculate the circumferential stress and longitudinal stress induced in the pipe.
7. A cylindrical shell 3 m long, 500 mm diameter is made up of 20 mm thick plate. Find the cylinder is
subjected to internal pressure of 5 N/mm2
. Find the resulting hoop stress, longitudinal stress, change in
diameter, change in length and change in volume. Take E = 2 x 105 N/mm2
and 1/m = 0.3
CSE - III SEM - DIGITAL LOGIC DESIGN - STUDY MATERIALS
CSE - III SEM - DIGITAL LOGIC DESIGN - STUDY MATERIALS
DLD important questions
Unit 1
i) Explain Gray Code and Unicode with examples.
ii) Explain Logic Gates with neat diagram and truth table
iii) Explain how NAND gate is works as a Universal Gate
iv) Why NOR gate is called as Universal Gate?
Also explain how it works as universal gates
Unit 2.
i) State and Prove Demorgan’s Theorem.
ii) Explain Adders with neat diagram
iii) Explain Digital Comparator with neat diagram.
iv) Explain Multiplexer with neat diagram
V) Explain Subtractors
Vi) Decoder
Unit 3.
i) Explain SR Flipflop, JK Flipflop, D Flipflop with its Function
ii) Explain Parallel to serial Convertor.
iii) Explain Asynchronous Up Counter with neat diagram.
iv) Explain Synchronous Down Counter with neat diagrams
V) Explain Decade Counter
Unit 4.
i) Explain Sensors with its types
ii) Explain TTL and CMOS interface.
iii) Explain Successive Approximation A/D Convertor.
iv) Explain R-2RLadder D/A Convertor
V ) Explain Dual Slope ADA convertor
Unit 5
i) Define Memory Read and Memory Write. Also explain ROM and its types
ii) Define Access Time and Word Length. Also Explain RAM and its types
iii) Difference between Fixed Logic and
Programmable Logic.
Iv) Differentiate Flash ROM and NVRAM
V)Explain PLA Architecture
Vi) Explain Pendrive, Sd card and SSD
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Monday, November 11, 2024
EXAM DATE : 12.11.2024 BOARD EXAM SUBJECTS AND STUDY MATERIALS
BOARD EXAM - NOVEMBER 2024
EXAM DATE : 12.11.2024 (MORNING EXAMS)
CIVIL 4010510 STRUCTURAL ENGINEERING - STUDY MATERIALS
AUTO - 4021510 - FUEL COMBUSTION AND EMISSION CONTROL STUDY MATERIALS
4020510 - DESIGN OF MACHINE ELEMENTS STUDY MATERIALS
4030510 - GENERATION TRANSMISSION AND SWITCH GEAR (GTS) STUDY MATERIALS
EXAM DATE : 12.11.2024 (AFTERNOON EXAMS)
Wednesday, October 23, 2024
Tuesday, October 15, 2024
DIPLOMA REGULATION 2023 III SEMESTER PRACTICAL QUESTION BANK FOR ALL DEPARTMENTS
Diploma 3 rd semester practical question bank for all departments ( 𝗖𝗟𝗜𝗖𝗞 𝗢𝗡 𝗧𝗛𝗘 𝗕𝗘𝗟𝗢𝗪 𝗟𝗜𝗡𝗞 𝗙𝗢𝗥 𝗗𝗢𝗪𝗡𝗟𝗢𝗔𝗗)
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Saturday, October 5, 2024
NAAN MUDHALVAN- EMPLOYABILITY SKILLS - IBM SKILLS BUILD ANSWERS
NAAN MUDHALVAN- EMPLOYABILITY SKILLS - IBM SKILLS BUILD ANSWERS
STEP - 1 WORKING IN A DIGITAL WORLD - PROFESSIONAL SKILLS
COURSE 1 - PRESENT WITH PURPOSE
COURSE 2 - COLLABORATE EFFECTIVELY
COURSE 3 - INTERPERSONAL SKILLS
COURSE 4 - DELIVER QUALITY WORK EITH AGILITY
COURSE 5 - SOLVING PROBLEMS WITH CRITICAL AND CREATIVE THINKING
STEP 2 - JOB APPLICATIONS ESSENTIALS
Develop Your Brand Using Social Media
Ace Your Professional Interview
Focus Your Direction with Workplace Research
STEP 2 - JOB APPLICATIONS ESSENTIALS - Focus Your Direction with Workplace Research
Focus Your Direction with Workplace Research
1. What might you find on a company’s “About” page?
Products and services they perform
How they’re crushing their competition
2. Which is a better place to learn about a company’s core values?
3. Which of the following focuses mostly on employment?
4. Which is the best place for a high school student to find internships or apprenticeships?
5. Which of the following is a good way to find workplace information?
A company’s news or product announcements
6. You’re talking to someone who works at an interesting company. Which is the better question to ask?
Is there anyone else I should also talk to?
How many vacation days do employees get?
7. Which of the following is most likely to help you find a local job serving your community?
8. Where can you learn about a company’s recent research efforts?
9. Which of the following is considered a job role?
10. The difference between a position and a job role is…
A job role is more specific than a position
A position is more specific than a job role
A job role pays more than a position
They are both pretty much the same
11. Which of the following is a skill?
I hope to become an astronomer
STEP 2 - JOB APPLICATIONS ESSENTIALS - Create a Great Professional Resume
Create a Great Professional Resume
1. On a high school resume, in what order should your Experience and Education appear?
Experience, then Education
Order does not matter
Education, then Experience
Education, but not Experience
2. Since recruiters will often ignore character traits like "hard-working" or "dedicated" when they appear in the Skills section of a resume, where is a good place to demonstrate these things?
It's impossible to use these phrases too often. Sprinkle them throughout your resume wherever you can.
Only discuss these traits during your interview.
Do not use phrases like this anywhere in your resume.
Demonstrate these through task and accomplishment bullet points in your Experience.
3. Which of the following is an appropriate bullet point for your Experience section?
Exceeded sales quotas by an average of 8 percent
Fluent in Brazilian Portuguese
My goal is to help foster children find new parents
Apple Certified Associate (ACA)
4. Complete the sentence: You should include a hobby award in your resume only if it __________.
was statewide or national
is annually sponsored by a government agency
was either a blue ribbon or first place in a large field of competitors
directly relates to a job opportunity
5. When might you identify your religion in your resume?
Never
When you do not wish to work alongside people of certain religions
That depends on how proud you are of your religious beliefs
When you're applying to a company or working in a culture that requires religious identification
6. Where would be the best place to highlight "Customer Empathy" or "Exceeds Expectations"?
In your Objective
In the Skills section
During your interview
In an Experience bullet point
7. Suppose you're looking for a job whose published requirements include "Customer Service." Which of the following would be better to list as a bullet point under Education?
Work-study job at school store
Producer of junior class musical
Won three scholastic writing awards
Captain of winning soccer team
8. Who is the first to read most resumes sent to larger companies?
The hiring manager
A secretary in the human resources (HR) department
A software program
The job recruiter
9. What is the first result you seek when submitting a resume?
Getting an interview
Getting a letter from the hiring manager
Getting a phone call
Getting a job offer
10. How often should you check your resume for job-specific edits that will help you land a position?
Never. Why fix what isn't broken?
When you graduate from school or college
Each time you apply for a different job
Every two months
11. When might you include a team sport in your activities?
When applying for a job in college
Always, because it says you're a team player
Never, because it's not business-oriented
When a job listing mentions teamwork
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