Sunday, April 29, 2012

ANNA UNIVERSITY EXAMINATIONS MAY/JUNE 2012 IMPORTANT QUESTIONS - REG

Anna University Important Questions For May/June 2012 Examinations (Common To All Colleges In Tamilnadu)

Anna University May/June 2012 Examinations Will Be Conducted In The Following Schedule And Important Questions For Subjects Will Be Updated Instantly So Stay Touch With Rejinpaul.Com For Further Updates 
------------------------------------------------------------
------------------------------------------------------------
Important Questions For May/June 2012 Examinations Will Be Updated From 1 May,2012 For Second,Third,Fourth Year Students

Please Note That Important Questions For The Corresponding Subjects Will Be Updated Two Or Three days Before The Actual Schedule Of Exams

Rejinpaul.com provide Only Important Questions Prepared By Experts For each Units. Important Questions What We Publish Here May Or May Not Be Asked For Your University Examination, We Recommend Students To Just Give More Importance  To Questions What We Post Here, Tough we guarantee at least a minimum of (60%-75%) Questions Will From Our Important Questions. Currently We Plan To Cover Subjects For ECE,CSE,IT,EIE,EEE,MECH Departments


Thanks For All Your Support For November/December 2011 Examinations Important Questions , We Are Happy To Hear That Nov/Dec 2011 Important Questions were Very Useful For You


ME2253 ENGINEERING MATERIALS AND METALLURGY ANNA UNIVERSITY QUESTION BANK


Subject: Engineering Materials and Metallurgy
Subject Code: ME2253
Question bank

Two mark questions

  1. Write the peritectic reaction in Fe-F3C diagram.
  2. Classify steel.
  3. What is the purpose of spheroidizing?
  4. How to avoid white layer in Nitriding treatment?
  5. List the effect of chromium in alloy steel.
  6. Name a few characteristics of bearing alloy.
  7. Write the applications of PVC
  8. Define the term FRC.
  9. What is micro hardness?
  10. What do you understand by work hardening?
  11. What are the effects of crystal structure and atomic radii on formation of solid solution between two metallic elements?
  12. Define Peritectic and Eutectoid reactions.
  13. A low carbon steel is stronger in the normalized condition than in the annealed condition. Why?
  14. Case carburizing heat treatment is not generally carried out for medium carbon steel. Why?
  15. Compare the martensite that is formed in maraging steel with the martensite that is formed in carbon steel.
  16. What is the main strengthening mechanism in high strength aluminium alloys?
  17. Name four ethenic polymers (polymers that have the basic monomer structure of ethylene)
  18. What are the important uses of alumina and silicon nitride?
  19. Define endurance limit in fatigue test.
  20. What properties are determined from tension testing of metallic products?

16 mark questions

  1. Compare different methods of hardness testing from all possible aspects such as accuracy, range, quickness, easiness and necessity.
  2. Describe, iron-carbon phase diagram. State how to use the diagram to understand solidification of 0.4% C steel and 4.3% C steel.
  3. Differentiate between grey-cast iron and spheroidal graphite cast iron.
  4. What do you understand by heat treatment? Mention the various stages of heat treatment procedure.
  5. Outline the principle of high frequency induction hardening. How induction hardening is carried out. Mention its advantages, disadvantages and applications.
  6. Discuss the effects of various alloying elements on the properties of metals. What is red hardness and how it is useful for cutting tools?
  7. What is bearing metal? Give its classification, composition, properties and uses.
  8. Describe the major properties of thermosetting plastics. What are the applications of phenolic and melamine?
  9. Explain the different types of important technological properties of metal.
  10. Describe the molecular structures, properties and applications of the following polymers:
i.             Polyvinyl chloride(PVC)
ii.            Polystrene(PS)
iii.          Polyethylene terephthalate(PET)
iv.          Polycarbonate(PC)


  1.  i. Draw an iron-carbon diagram neatly.(ii). Using the iron-carbon diagram, predict the microstructure at room temperature of a carbon steel that contains 0.4% carbon when cooled in furnace.

12. i. Elements A and B melt at 700° C and 1000°C respectively. Draw a                              typical isomorphous phase diagram between the elements A and B.
     ii. Elements A and B melt at 700° C and 1000°C 700 respectively. They form an        eutectic at 35% A at temperature 500°C. Draw a typical phase diagram between A and B.


13. Draw a schematic CCT diagram for a carbon steel containing 0.8% carbon. Using this diagram, explain how different cooling curves lead to (i) annealing heat treatment, (ii) normalizing heat treatment, and (iii) hardening heat treatment.

14.    i. Explain how Jominy end quench test is used for determining the    hardenability of steels.
        ii. Explain the steps in case carburising of steels.
  1. Write a short note on compositions and properties of the following steel:
    1. Austenitic stainless steel
    2. High speed steel
    3. Martensitic stainless steel.
    4. Maraging steel.

  1. How will you classify brass based on the composition of zinc? Explain the properties and applications of the main types of brass.
  2. Explain the steps involved in precipitation hardening treatment.
  3. Explain the mechanisms of plastic deformation of metals by slip and twinning.
  4. Explain the characteristics of ductile fracture and brittle fracture.
  5. Explain the testing procedure for Vickeres Hardness testing.
  6. Explain the testing procedure for Charpy impact testing.













ME2255 ELECTRONICS AND MICROPROCESSOR QUESTION BANK

ME2255 ELECTRONICS AND MICROPROCESSOR ANNA UNIVERSITY QUESTION BANK
UNIT I - SEMICONDUCTORS AND RECTIFIERS
2 MARKS

1. What are valence electrons?
2. What is forbidden energy gap?
3. What are conductors? Give examples?
4. What are insulators? Give examples?
5. What are Semiconductors? Give examples?
6. What are the types of Semiconductor?
7. What is Intrinsic Semiconductor?
8. What is Extrinsic Semiconductor?
9. What are the types of Extrinsic Semiconductor?
10. What is P-type Semiconductor?
11. What is N-type Semiconductor?
12. What is doping?
13. Which is majority and minority carrier in N-type Semiconductor?
14. Which is majority and minority carrier in P-type Semiconductor?
15. What is depletion region in PN junction?
16. What is barrier voltage?
17. What is meant by biasing a PN junction?
18. What are the types of biasing a PN junction?
19. What is forward bias and reverse bias in a PN junction?
20. What is Reverse saturation current?
21. What is reverse break down?
22. Give the diode current equation?
23. Give two applications of PN junction diode.
24. What is rectifier? Give its types.
16 MARKS
1. Explain N-type and P-type semiconductor with their energy band diagram?
2. Explain the following
a. Mobility b. Drift current c. Conductivity d. Diffusion current
3. What is break down in diode? What are its types?

Unit II - TRANSISTORS AND AMPLIFIERS
2MARKS 
1. What is a transistor (BJT)?
2. What are the terminals present in a transistor?
3. What is FET?
4. Why FET is called voltage controlled device?
5. What are the two main types of FET?
6. What are the terminals available in FET?
7. What is JFET?
8. What are the types of JFET?
9. What are the two important characteristics of JFET?
10. What is transconductance in JFET?
11. What is amplification factor in JFET?
12.Why do we choose q point at the center of the loadline?
13. List out the different types of biasing. ._
14. What do you meant by thermal runway?
15. Why is the transistor called a current controlled device?
16. Define current amplification factor?
17. What are the requirements for biasing circuits?
18. When does a transistor act as a switch?
19. What is biasing?
20. What is stability factor?
21. Explain about the various regions in a transistor?
22. Explain about the characteristics of a transistor?

16 MARKS

1. Explain the construction, operation, volt ampere characteristics, and application
of SCR, also explain its two transistor model.
2. Explain the construction, operation, equivalent circuit, volt ampere
characteristics, and application of UJT.
3. Explain the construction, operation, equivalent circuit, volt ampere
characteristics, and application of DIAC.
4. Explain the construction, operation, equivalent circuit, volt ampere
characteristics, and application of TRIAC

Unit III - DIGITAL ELECTRONICS
2MARKS
1. Define binary logic?
2. Convert (634) 8 to binary
3. Convert 0.640625 decimal number to its octal equivalent.
4. Convert 0.1289062 decimal number to its hex equivalent
5. Substract (0 1 0 1) 2 from (1 0 1 1) 2
6. Add (1 0 1 0) 2 and (0 0 1 1) 2
7. Using 10’s complement subtract 72532 - 3250
8. Find 2’S complement of (1 0 1 0 0 0 1 1) 2
9. Substract 1 1 1 0 0 1 2 from 1 0 1 0 1 1 2 using 2’ s complement method
10. What is meant by bit?
11. Define byte?
12. List the different number systems?
13. What are the different types of number complements?
14. Given the two binary numbers X = 1010100 and Y = 1000011, perform the
subtraction (a) X -Y and (b) Y - X using 2’s complements.
15. Write the names of basic logical operators.
16. What are basic properties of Boolean algebra?
17. State the associative property of boolean algebra.
18. State the commutative property of Boolean algebra.
19. State the distributive property of Boolean algebra.
20. What are the classification of sequential circuits?
21. Define Flipflop.
22. What are the different types of flip-flop?

16 MARKS

1. What is the operation of RS flip-flop?
2. What is the operation of SR flip-flop?
3. What is the operation of D flip-flop?
4. What is the operation of JK flip-flop?
5. What is the operation of T flip-flop?
6. What are the different types of shift type?
7. Explain couners.

Unit IV -  8085 MICROPROCESSOR
2MARKS

1. Give the power supply & clock frequency of 8085Microprocessor
2. What is the signal classification of 8085
3. What are operations performed on data in 8085
4. Steps involved to fetch a byte in 8085
5. How many interrupts does 8085 have, mention them
6. Basic concepts in memory interfacing
7. Define instruction cycle, machine cycle and T-state
8. What is an instruction
9. What is the use of ALE
10. How many machine cycles does 8085 have, mention them
3. What are operations performed on data in 8085


4. Steps involved to fetch a byte in 8085
5. How many interrupts does 8085 have, mention them
6. Basic concepts in memory interfacing
7. Define instruction cycle, machine cycle and T-state
8. What is an instruction
9. What is the use of ALE
10. How many machine cycles does 8085 have, mention them
11. Explain the signals HOLD, READY and SID
12. Mention the categories of instruction and give two examples for each category
13. Explain LDA, STA and DAA instructions
14. Explain the different instruction formats with examples
15. What is the use of addressing modes , mention the different types
16. Differentiate between absolute and linear select decoding?
17. What is the use of bi-directional buffers
18. Give the resister organization of 8085
19. Define stack and explain stack related instructions
20. Why do we use XRA A instruction
21. Define PSW
22. What is Microcontroller and Microcomputer

16 MARKS

1. Compare CALL and PUSH instructions
2. How does the microprocessor differentiate between data and instruction.
3. Explain 8085 architecture.
4. Explain the instruction set.of 8085.
5. Explain the Addressing modes

Unit V - INTERFACING AND APPLICATIONS OF MICROPROCESSOR
2MARKS

1. Give few applications of 8085 microprocessor.
2. List the advantages of microprocessor based system design.
3. What is a Buffer?
4. What is a tristate buffer?
5. What is meant by memory address space?
6. If an information flows from memory to microprocessor, which signal is used
by it?
7. What is the use CS pin of a memory chip?
8. If the starting address of 6K memory is 0D00, then ending address will be
9. If an information flows to memory, which signal is used by it?
10.What is memory mapping?
11. What is I/O mapping?
12. What is memory mapped I/O?
13. What is I/O mapped I/O?
14. Mention the advantages of memory mapped I/O.
15. Mention the advantages of I/O mapped I/O.
16. Mention the disadvantages of I/O mapped I/O.
17. What is the use of ALE signal?
18. What is the purpose IO/M signal?
19. Nane the two classifications of stepper motor.
20. List the applications of stepper motor.

16 MARKS

1. Explain I/O interfacing.
2. Explain stepper motor interfacing.
3. Explain traffic light control.
4. Explain temperature control using 8085.