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# KTU First Semester Previous Question Paper January 2016

## KTU First Semester Previous  Question Paper January 2016

Click Here: for First Year Previous Questions of Introduction to Civil & Introduction to Mechanical Engineering Sciences

KTU First Semester Previous Question Paper January 2016

### Engineering Physics

B
10001
Reg. No.:___________________                           Name:_____________________

FIRST SEMESTER B.TECH DEGREE EXAMINATION, JANUARY 2016
Course Code: PH100
Course Name: ENGINEERING PHYSICS

Max. Marks: 100                                                                           Duration: 3 Hours
Part A

Answer ALL questions. Each question carries 2 marks

1. What do you mean by quality factor of an oscillator?
2. What is the relation between path difference and phase difference in wave        motion?
3.  Two independent sources of light cannot produce interference fringes. Why?
4.  Define dispersive power of a grating.
5.  Distinguish between plane polarized light and unpolarized light.
6.  What is Meissner effect?
7.  What is phase space?
8.  What is the probability interpretation of wave function?
9.  What is the relation connecting reverberation time and total absorption?
10. What is magnetostriction effect?
11. Write any two advantages of Hologram over photographic images.
12. Distinguish between Step index fibre and Graded index fibre.

Part B
Answer any 10 questions. Each question carries 4 marks

1. Compare an electrical and mechanical oscillator.
14. A transverse wave on a stretched string is described by y(x, t) =4.0 sin (25t+0.0 I 6x+m/3) where x and y are in cm and t is in second.
Obtain the (i) Speed (ii) Amplitude (iii) Frequency and(iv)Initial phase at the origin.
15. With Newton’s rings arrangement, nth dark ring formed by light of wavelength 6000 A° coincides with the (n+l)t dark ring for light of wavelength 4500A°. If the radius of curvature of the convex surface is 90 cm, find the diameter of the nth ring for light wavelength 6000 A°.
16. A plane transmission grating has 6000 lines/cm. Find the angular separation between two wavelengths 500 nm and 510 nm in the 3rd order.
2. The refractive index of calcite is 1.658 for ordinary ray and it is 1.486 for extraordinary ray. A slice having thickness O.9x104cm is cut from the crystal. For what wavelengths this slice will act as a (i) Quarter wave plate. (ii)Half wave plate
3. Distinguish between type I and type II super conductors with examples.
4. Calculate the de Broglie wavelength of electron whose kinetic energy is 10 keV.
20. Distinguish between Macrostate and Microstate of a system
21. The volume of a hail is 3000 m3. It has a total absorption of 100 m2 sabine. If the hail is filled with audience who add another 8Om2sabine, then find the difference in reverberation time.
22. What is NDT? How ultrasonic wave is used for NDT.
23. What is the difference between Spontaneous emission and Stimulated emission?
24. What is a LED? Give its working principle.

Part-C
Answer any 3 questions. Each question carries 6 marks.

1. Considering the transverse vibration in a stretched string, derive the differential equation of one-
dimensional wave.
26. Light from a monochromatic source is allowed to fall on a single slit. Two lenses are given. With the help of a neat diagram write the experimental set up for obtaining the diffraction pattern. Deduce the conditions for getting bright and dark regions on the screen. Also obtain the width of central maximum.
27. How a Nicol prism can be constructed from a calcite crystal? How can it be used as a polarizer and as an analyzer?
28. Formulate Schrodinger’s time dependent equation starting from a plane wave equation by using de Brogue’s formula and Einstein’s relation for photon energy.

Part-D
Answer any 3 questions. Each question carries 6 marks.

1. With a neat diagram explain how ultrasonic waves are produced by piezoelectric oscillator
30. What are the factors affecting the acoustics of a building?
31. Outline the principle and working of Ruby Laser.
32. Define numerical aperture of an optical fibre and derive an expression for NA of a ‘step index fibre.

Click Here: for First Year Previous Questions of Introduction to Civil & Introduction to Mechanical Engineering Sciences

### KTU First Semester Previous Question Paper January 2016 Engineering Chemistry

10007                                                                                                                                       B

Reg. No.:__________________                                                       Name: ___________

FIRST SEMESTER B.TECH DEGREE EXAMINATION, JANUARY 2016
Course Code: CY100
Course Name: ENGINEERING CHEMISTRY

Max. Marks: 100 Duration: 3 Hours

Part A
Answer all questions, each question carries 2 marks

1. The absorbance of a 0.01M dye solution in ethanol is 0.62 in a 2cm cell for light of wavelength 5000 A°. If the path length of light through the sample is doubled and the concentration is made half, what will be the value of absorbance?
2. A zinc wire is dipped in silver nitrate solution taken in beaker A and a silver wire is dipped in zinc sulphate solution taken in beaker B. Predict in which beaker the ions present will get reduced. Given that the standard reduction potential of zinc and silver are -0.76V and 0.80V respectively.
3. Write the essential components of gas chromatography equipment.
4. What is poiy aniline? Give its structureand two applications.
5. What is cetane number?
6. Write two examples of solid lubricants. Compare their structure.
7. Hard water does not produce much lather with soaps or detergents. Give reason.
8. Write the significance of BOD.

(8×2= 16 Marks)

PartB
Answer all questions, each question carries 3 marks

1. Write three points of comparison between UV and JR spectrum.
10. Write three advantages of hydrogen – oxygen fuel cell.
11. Define the term cell constant.The specific conductivity of a 0.3N KC1 solution at 27°C is 0.028 S cm1. Resistance of the cell containing this solution is 300 ohms. Determine cell constant.
12. What is the nature of bonding in carbon nanotubes? Write two applications of carbon nanotubes (CNTs).
13. Write the composition and uses of natural gas.
14. What is viscosity index (V.1)? Oils having high viscosity need not necessarily have high V.1 Comment.
15. Give three points of difference between aerobic oxidation and anaerobic oxidation.
16. What are ion exchange resins? Give examples for cation and anion exchange resins.

(8 x 3 = 24 Marks)

Part C
Each question carries 10 marks

1. (a) Why does a signal for a particular set of protons split into a multiplet? Give number of signals, peak ratio and multiplicity of different sets of protons in the NMR spectrum of 1- bromopropane.
(b) Give a neat and labelled sketch of instrumentation of UV-visible spectrometer.
(c) Write a note on vibrational modes of carbon dioxide molecule. State which of these modes are JR active; andgive reason for their activity.

(4+3+3)

OR

1. (a) What is chemical shift? Write the cause of chemical shift.
(b) CO molecule absorbs at 2140cm1. Calculate the force constant of the molecule, given atomic masses of C and 0 are 12u and 16 u respectively lu =1.67 x 1027kg.
(c) What are the various energy transitions possible in a molecule? Why does electronic  spectrum appear broad?

(4+3+3)

1. (a) Design a reversible cell for the reaction;
2Al(s) +3Fe2 (aq) 2A13 (aq) +3Fe ().Derive Nernst equation for the cell.
(b)Explain the variation of emf of Daniel cell with respect to temperature and concentration.                                                                                               (5+5)

OR

1. (a)Draw a well labelled diagram of calomel electrode. Write electrode reaction and representation of the electrode.
(b) Find the potential of hydrogen electrode at 25°C for solution of pH=0 and pH=14
(c)Why Aluminium metal when reacts with acid and base liberates H2 gas; whereas Fe metal• can liberate J2 only from acids. E°A13/Al=-1 .66V and E°Fe2/Fe=-0.44V

(4+3+3)

1. (a)Explain the principle and instnimentation of HPLC.
(b)Differentiate between DTA thermogramand TGAthermogram graphically. Give one important application of each type.

(5+5)

OR

1. (a)Give a comparison of GSC and GLC.
(b)Write the working of TLC. List the important applications.

(5+5)

1. (a)Give the classification of conducting polymers and write the mechanism of conduction in them.
(b)Write structural formulae and important uses of the polymers Keviar and ABS.

(6+4)

OR

1. (a) Write the preparation and important properties of silicone rubber.
(b) Write the sol- gel method for the synthesis of nanomaterials. (5+5)
25.
(a) What are greases? Write a brief note on their classification.
(b)The temperature of l000g of water was increased from 26.5°C to 29.2°C on burning 0.80g of a solid fuel in a bomb calorimeter. Water equivalent of calorimeter and latent heat of steam are 385 g and 587 callg respectively. If fuel contains 0.7% hydrogen calculate its gross and net calorific value.

(6+4)

OR

26. (a)Calculate the net and gross calorific value of a coal sample having following composition:C=82%, H=8%, 0=5%, N=1 .4% and ash=3.6 %.
(b) Define the properties of a liquid lubricant which are useful for their evaluation under the following conditions (i) fire hazards (ii) very low temperature.
(c)What is biodiesel? List its environmental advantages.

(4+3+3)

1. (a) Give the theory of EDTA method for estimating the hardness of water.
(b) 2.8g of CaCO3 was dissolved in HC1 and the solution diluted to one litre. 100 mL of this solution required 28 mL of EDTA solution, while 100 ml of the hard wateiYrequired 35 mL of the same EDTA solution. On the otherhand 100 mL of the boiled sample water when titrated against EDTA required 10 mL of EDTA solution. Calculate the temporary and permanent
hardness of water?

(4+6)

OR

1. (a) With the help of a neat diagram outline the reverse osmosis process.
(b)A sample of water is found to contain 48.6 mg/L Ca(HCO3)2, 43.8 mgfL Mg(HCO3)2,. 24.0 mgfL MgSO4 , 27.2 mg/L CaSO4 and 16.8 mg/L NaHCO3. Calculate the carbonate and
non-carbonate hardness of water.                                                         (5 +5)

(6x 10=60 marks)

KTU First Semester Previous Question Paper January 2016 Calculus.pdf

KTU First Semester Previous Question Paper January 2016 Engineering Physics.pdf

KTU First Semester Previous Question Paper January 2016 Engineering Chemistry.pdf

Click Here: for First Year Previous Questions of Introduction to Civil & Introduction to Mechanical Engineering Sciences

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