Question Bank-Engineering Chemistry-1

The question bank for Engineering Chemistry-1 for the Anna university first years.
UNIT – I – WATER TREATMENT PROCESS
PART – A ( 2 Marks)
1. Define hardness of water.
2. Distinguish between carbonate hardness and noncarbonate hardness.
3. Draw the structure of EDTA. What happens when EDTA is added to
hard water?
4. Define alkalinity.
5. Why is water softened before using in boiler?
6. What is meant by priming and foaming? How can they be prevented?
7. What is meant by caustic embrittlement? How is it prevented?
8. Indicate the reasons for boiler corrosion.
9. What is the role of phosphates in the internal treatment of water?
10. What is calgon conditioning? How is it functioning in water treatment?
11. Mention requisites of potable water.
12. Write briefly on disinfection of water by UV treatment.
13. Write the principle involved in the desalination of water by reverse
osmosis.
14. Define the term break-point chlorination.
15. Define desalination.
16. What is Sodium zeolite? What is its use?
PART – B ( 16 Marks)
1. (i) What is the principle of EDTA method? Describe the estimation of
Hardness of water by EDTA method. (8)
(ii) What is the various methods by which disinfection of domestic water is
carried out? Explain. (8)
2. (i) Describe briefly the different steps in the purification of water for drinking
Purposes. (8)
(ii) What is desalination? Name the different methods of desalination. Explain
any one in detail. (8)
3. (i) Discuss briefly about the problems caused due to the usage of hard water
in boilers. (8)
(ii) What are Zeolites? How do they function in removing the hardness? (8)
4. (i) How is internal treatment of boiler water carried out? (8)
(ii) Describe the principle and method involved in the determination of
different types and amount of alkalinity of water (8)
UNIT – II – SURFACE CHEMISTRY
PART – A ( 2 Marks)
1. How does chemisorption differ from physisorption?
2. How will you increase the activity of adsorbent?
3. Define adsorption? What is an adsorption isotherm?
4. What is Freundlich’s adsorption isotherm?
5. What are promoters?
6. What is catalytic poisoning?
7. What is the effect of temperature and pressure on the adsorption of
hydrogen gas on charcoal?
8. Define ion-exchange adsorption
9. What is langmuir adsorption isotherm? How it is mathematically represented?
10. What is the demerit of langmuir adsorption isotherm?
PART – B ( 16 Marks)
1. (i) Distinguish between physical adsorption and chemisorption. [6]
(ii)Derive an expression for Langmuir unimolecular adsorption isotherm.
What are its limitations? [10]
2 (i) Explain adsorption theory (or) contact theory with examples. [6]
(ii) Explain the classification & functions of ion-exchangers.[10]
3 (i) Define the term adsorption and list its application [4]
(ii) Explain the role of adsorption in demineralization of water.[8]
(iii) Give any three factors on which adsorption depends [4]
4 (i) Derive Freundlich’s adsorption isotherm. Give the conditions in which
It fails. [6]
(ii) Explain the role of adsorption in catalytic reactions [10]
5 (i) Discuss the factors which influence adsorption of gas on a solid. [8]
(ii) Define adsorption isotherm. Explain the various types of adsorption
Isotherm. [8]
6 (i) Explain the role of adsorbents in pollution abatement. [12]
(ii) Define the terms adsorbent and adsorbate giving suitable examples.[4]
UNIT – III – ELECTROCHEMISTRY
PART – A ( 2 Marks)
1. What is a cell? Mention its types.
2. Define the terms (i) single electrode potential (ii) Electrochemical cells.
3. Define Helmholtz electrical double layer.
4. Write Nernst equation.
5. Define a reference electrode. Give one example.
6. What is electromotive series? What is its significance?
7. What is electrode concentration cell? Give one example.
8. Find the potential of the cell in which the following reactions takes place
at 250 C.
Zn (s) + Cu2+ (0.02M) ® Cu(s) + Zn2+ (0.4M)
9. What is electro chemical cell?
10. Why can glass electrode not be used for a solution of high alkalinity?
11. What are reversible & irreversible cells?
12. What are the advantages of conductometric titrations?
PART B [ 16 marks]
1. (i) Derive Nernst equation. Give its significances. (8)
(ii) What are reference electrodes? Describe any two reference electrodes
with neat diagram and mention their uses. (8)
2. (i) Describe a glass electrode. How can it be used for determining the pH
Of a solution? (8)
(ii) How is Emf of a galvanic cell measured by poggendroff’s compensation
method? (5)
(iii) Consider the cell reaction,
Zn(s) +Fe2+ (0.005 M) Zn2+ (0.01 M) + Fe(s)
Given that the standard emf of the cell at 298 K is 0.323 V. Construct the cell
and Calculate the emf of the cell. (3)
3. (i) What are Reference Electrode? Explain the types with neat diagrams and
mention their uses (8)
ii) Describe the construction and working of calomel electrode & hydrogen
electrode (4+4)
4. (i) What is the principle underlying conductometric titration? Explain acid-base
titrations with neat graph. (8)
HS1103- Engineering chemistry - I
Kings college of Engineering
(ii)Describe a quinhydroneelectrode how it can be used for the determination of
pH of the solution? (8)
5. (i) What is the principle underlying Potentiometric titration? Explain Redox
titrations with neat graph. (8)
(ii)What is electrochemical series .Give its applications (8)
UNIT – IV – ENERGY SOURCES AND ENERGY STORING DEVICES:
PART – A ( 2 Marks)
1. Define nuclear fission.
2. What is nuclear chain reaction/
3. What is a nuclear reactor?
4. Mention any two differences of a nuclear reaction and a chemical reaction?
5. What is breeder reactor?
6. What is solar cell?
7. What are the applications of hydrogen-oxygen fuel cell?
8. What is wind energy? How is it obtained?
9. What is fissile and fertile nucleides?
10. What is super critical mass and sub critical mass?
11. What is nuclear energy?
12. What is a battery? How does it differ from a cell?
13. What are the advantages of alkaline battery over dry cell?
14. How is NICAD battery constructed?
PART – B ( 16 Marks)
1. (i) What is a nuclear reactor? Describe the components of a light water nuclear
power Plant with a suitable block diagram. (10)
(ii) Explain the mechanism and characteristics of a nuclear fission reaction with
suitable Example. (6)
2. i)What is reversible battery? Describe the construction and working of lead acid
storage battery with reacting occurring during charging and discharging. (8)
(ii) How is NICAD battery constructed? Explain with cell reactions. Give its uses. (8)
3 i) Write a brief note on Lithium battery. (8)
ii) What are Fuel cells? Explain the construction and working of H2-O2 fuel cell.(8)
4. i) Define Photo galvanic cell. Explain its working with diagram. Give its
applications. (10)
ii) Write note on wind energy. (6)
UNIT – V – ANALYTICAL TECHNIQUES AND CHEMOMETRICS
PART – A ( 2 Marks)
1. State Beer –Lambert’s law. Give its limitations.
2. Name the components of colorimeter.
3. What is flame photometry?
4. How are alkali and alkaline –earth metals detected in flame photometry?
Give examples.
5. What are the sources of UV light in UV-Visible spectrophotometer?
6. Define the term Bathochromic shift.
7. What is finger print region? Mention its important uses.
8. Write any two disadvantages of AAS.
9. Compare atomic absorption spectroscopy and flame emission spectroscopy
10. How are IR spectral range subdivided?
11. What are the limitations of flame photometry?
PART – B ( 16 Marks)
1. (i) Derive Beer-Lambert’s law. Give its limitations. (8)
(ii)What is Colorimetry? With a block diagram explain how it is used to
estimate iron (8)
2. (i) Explain briefly the principle and instrumentation of flame photometry. How
do you estimate sodium using flame photometry? (8)
(ii)Explain the various components and working of UV-Visible
Spectrophotometer. (8)
3. (i)What is IR spectroscopy?. Explain the various components and working of IR
spectrophotometer. (8)
ii) With neat energy level diagram explain various transitions involved in UV
Spectra. (8)
4.(i) Explain how different fundamental modes for different types of compounds
Are estimated in IR spectra. (8)
(ii) Discuss the principle of atomic absorption spectroscopy. Give the block
diagram of AAS.(8)

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Question Bank for Engineering Graphics

The model question bank for Engineering graphics for first year under Anna University.
UNIT – I (PLANE CURVES & FREEHAND SKETCHING
a) ELLIPSE, PARABOLA & HYPERBOLA
1. Draw the locus of a point P moving so that the ratio of its distance from a fixed point F to
its distance from a fixed straight line DD’ is ¾ . Also draw tangent and normal to the curve
from any point on it.
2. Construct an ellipse given the distance of the focus from the directrix as 60 mm and
eccentricity as 2/3. Also draw tangent and normal to the curve at a point on it 20 mm
above the major axis.
3. Construct a parabola given the distance of the focus from the directrix as 50 mm. Also
draw tangent and normal to the curve from any point on it.
4. Draw the locus of a point P moving so that the ratio of its distance from a fixed point F to
its distance from a fixed straight line DD’ is 1. Also draw tangent and normal to the curve
from any point on it.
5. Draw a hyperbola when the distance between the focus and directrix is 40 mm and the
eccentricity is 4/3. Draw a tangent and normal at any point on the hyperbola.
b) CYCLOIDS & INVOLUTES
6. Draw the involute of a square of side 30 mm. Also draw tangent and normal to the curve
from any point on it.
7. A coir is unwound from a drum of 30mm diameter. Draw the locus of the free end of the
coir for unwinding through an angle of 360°. Draw also a tangent and normal at any point
on the curve.
8. A circle of 50 mm diameter rolls along a straight line without slipping. Draw the curve
traced by a point P on the circumference for one complete revolution. Draw a tangent and
normal on it 40 mm from the base line.
9. Draw an epicycloids generated by a rolling circle of diameter 40 mm and the diameter of
the directing circle is 140 mm. Also draw tangent and normal to the curve from any point
on it.
10. Draw a hypocycloid generated by a rolling circle of diameter 50 mm and the diameter of
the directing circle is 240 mm. Also draw tangent and normal to the curve from any point
on it.


UNIT – II (PROJECTION OF POINTS, LINES & PLANE SURFACES)
a) POINTS
1. Mark the projections of the following points on a common reference line:
P, 35 mm behind the VP and 20 mm below the HP.
Q, 40 mm in front of VP and 30 mm above the HP.
R, 50 mm behind the VP and 15 mm above the HP.
S, 40 mm below the HP and in the VP.
2. A point C is on HP and 15 mm behind VP. Another point D is also on HP and 40 mm in
front of VP. The distance between their projectors is 45 mm. Join their front views and
determine inclination of this line with XY line.
3. A point P is on HP and 20 mm in front of VP. Another point Q is also on HP and behind
VP. The distance between their end projectors is 60 mm. Draw its projections if the line
joining P & Q makes an angle of 60º with the reference line. Also find the positions of
point P and Q.
b) LINES
4. A line PQ, 50 mm long is perpendicular to HP and 15 mm in front of VP. The end P
nearer to HP 20 mm above it. Draw the projections of the line.
5. A line PQ, 60 mm long has one end P, 20 mm above the HP and 35 mm in front of VP.
The line is parallel to HP. The front view has a length of 50 mm. Find its true inclinations
with VP.
6. A line NS, 80 mm long has its end N,10 mm above the HP and 15 mm in front of VP. The
other end S is 65 mm above the HP and 50 mm in front of VP. Draw the projections of the
line and find its true Inclination with HP and VP.
7. The end P of a line PQ is 30 mm above HP and 35 mm in front of VP. The line is inclined
at 35° to HP. Its top view is 70 mm long inclined at 40° to XY. Draw the projections of
straight line. Find the true length and inclination of the line with VP.
8. A line MN has its end M, 15 mm in front of VP and 20 mm above the HP. The other end N
is 55 mm in front of VP. The front view has a length of 80 mm. The distance between end
projectors is 65 mm. Draw the projections of line. Find its true length and true inclinations
by trapezoidal method.
9. The mid point of a line AB, 80 mm long, is 30 mm above HP and 45 mm in front of VP.
The line is inclined at 30º to HP and 50º to VP. Draw the projections.
10. A straight line ST has its end S, 10 mm in front of VP and nearer to it. The mid point ‘m’ of
the line is 50 mm in front of VP and 40 mm above HP. The front and top views measure
90 mm and 120 mm respectively. Draw the projections of the line. Also, find the true
inclinations with VP and the HP.
11. A line MN has its end M, 10 mm in front of VP and 15 mm above HP. The other end N is
50 mm in front of VP. The front view has a length of 70 mm. The distance between the
end projectors is 60 mm. Draw the projections of the line. Find its true length, true
inclinations and traces by trapezoidal method.
c) PLANE SURFACES
12. A regular hexagonal lamina of side 30 mm rests on one of its edges on HP. The lamina
makes 60°with HP and the edge on which it is resting makes an angle of 60° with VP.
Draw its projections.
13. A circular plate of diameter 70 mm has the end P of the diameter PQ in the HP and the
plate is inclined at 40° to HP. Draw its projections when the diameter PQ appears to be
inclined at 45° to VP in the top view.
14. A hexagonal plate of side 20 mm rests on the HP on one of its sides inclined at 45° to VP.
The surface of the plate makes an angle of 30° with the HP. Draw the front view and top
view of the plate.

UNIT – III (PROJECTION OF SOLIDS)
1. A cube of side 40 mm rests on the HP on one of its ends with a vertical face inclined at
40° to VP. Draw its projections (top view, front view and side view).
2. A pentagonal prism of base side 30 mm and axis length 55mm is lying on the ground on
one of its rectangular faces. Draw its top view, front and left side view when its axis is
perpendicular to VP and the end nearer to the VP is 15 mm away from it.
3 A hexagonal prism of base side 30 mm and axis length 60 mm rests on the HP on one of
its base edges with its axis inclined at 60° to HP and parallel to the VP. Draw its top and
front views.
4. A cylinder of diameter 30 mm and axis length 50 mm is resting on the HP on a point so
that its axis is inclined at 45° to HP and parallel to VP. Draw its top and front views.
5. A hexagonal prism, side of base 20mm and axis 60mm long lies on one of its longer
edges on HP and its axis is parallel to both HP and VP. Draw its projections.
6. Draw the projection of a cone of diameter 40mm and height 70mm lying on the ground on
one of its base points with a generator perpendicular to HP.
7. A cone of base diameter 50mm and axis length 65mm is resting on H.P on a point
on the circumference of the base with its axis inclined at 400 to V.P and parallel to
H.P. Draw its Projections.
8. A square prism of base side 35mm and axis length 60mm lies on the HP on one of its
longer edges with its faces equally inclined to the HP. Draw its projections when its axis
is inclined at 300 to the VP.
9. A square pyramid of base side 35mm and axis length 65mm is resting on HP on one of its
triangular faces with its axis parallel to VP. Draw its projections.
10. A right pentagonal pyramid of side 20 mm and altitude 50 mm rests on one of its edges of
the base in the HP. The base being tilted up such that the apex is 30 mm above HP.
Draw the projection of the pyramid when the edge on which it is resting is perpendicular
to VP.
11. A hexagonal pyramid of side 25mm, axis 75 mm long lies with one of its triangular faces
on the HP and its axis parallel to VP. Draw its projections.

UNIT – IV (SECTION OF SOLIDS AND DEVELOPMENT OF SURFACES)
SECTION OF SOLIDS
1. A cube of side 30 mm rests on the HP on its end with the vertical faces equally inclined to
the VP. It is cut by a plane perpendicular to the VP and inclined at 30° to HP meeting the
axis at 25 mm above the base. Draw its front view, sectional top view and true shape of
the section.
2. A pentagonal prism of base side 40mm and height 85mm rests on the H.P such that two
of its base edges are equally inclined to VP. It is cut by a plane perpendicular to the V.P
and inclined 450 to the H.P. The cutting plane meets the axis at 30mm from the top. Draw
the front view, sectional top view and true shape of the section.
3. A hexagonal prism of side of base 20 mm and length 60 mm rests on HP with its axis
being vertical and one edge of its base inclined at 15° to VP. The solid is cut by a plane
perpendicular to VP and inclined at 40° to HP and bisecting the axis of the prism. Draw
the projections of the prism and true shape of thesection.
4. A cylinder of diameter 50mm and height 60mm rests on its base on H.P. It is cut by a
plane perpendicular to V.P. and inclined at 450 to H.P. The cutting plane meets the axis at
a distance of 15mm from the top. Draw the sectional plan and true shape of the section.
5. A right circular cone of base diameter 50mm and axis length 60mm rests on its base on
the H.P. It is cut by a plane perpendicular to the H.P and inclined at 600 to the VP. The
shortest distance between the cutting plane and the top view of the axis is 8mm. Draw the
top view, sectional front view and the true shape of the section.
6. A pentagonal pyramid of base side 20mm and altitude 55mm rests on its base on HP with
one base edge being perpendicular to VP. It is cut by plane inclined at 500 to base. The
cutting plane meets the axis at 15mm above the base. Draw the front view, sectional top
view and true shape of the section
7. A hexagonal pyramid of base side 25mm and axis 55 mm rests on its base on the HP
with two base edges perpendicular to VP. It is cut by a plane perpendicular to VP and
inclined at 30° to HP, meeting the axis at 20mm from the vertex. Draw its front view,
sectional top view and true shape of the section.
8. A square pyramid of base side 25mm and altitude 40mm rests on the HP on its base with
the base edges equally inclined to the VP. It is cut by a plane perpendicular to the VP and
inclined at 30° to the HP meeting the axis at 21mm above the HP .Draw the sectional top
view and the true shape of the section.
9. A cone of base diameter 50mm and altitude 60mm rests on its base on the HP. It is cut
by a plane perpendicular to the VP and inclined at 400 to the HP. The cutting plane
meets the axis at 30mm from the vertex .Draw the sectional top view.
10. A cone of base diameter 50mm and altitude 60mm rests on its base on the HP . It is cut
by a plane perpendicular to the VP and parallel to one of the extreme generators , 10mm
away from it .Draw the sectional top view and the true shape of the section
DEVELOPMENT OF SURFACES
1. A pentagonal prism of base side 30 mm and axis height 75 mm is resting on its base on
HP with two of its lateral surfaces parallel to VP. It is cut by plane perpendicular to VP
and inclined at 45º to HP, bisecting the axis. Draw the development of lateral surfaces of
the lower portion of the prism.
2. A hexagonal prism of base side 30 mm and axis height 70 mm is resting on its base on
HP with one of its faces parallel to VP. It is cut by plane perpendicular to VP and inclined
at 35º to HP, meeting the axis at a distance of 40 mm from the base. Draw the
development of lateral surfaces of the lower portion of the prism
3. A pentagonal prism of base side 30 mm and height 60 mm is cut by a plane
perpendicular to VP and 50º to HP and passing through the axis at a height of 35 mm
above the base. Draw the development of the lower portion of the solid.
4. A hexagonal prism of side of base is 25 mm and height 55mm rests with its base on HP
and one of its rectangular faces is parallel to VP. A circular hole of 40 mm diameter is
drilled through the prism such that the axis of the hole bisects the axis of the prism at right
angles and is perpendicular to VP. Draw the development of the lateral surface of the
prism with the hole.
5. A cylinder of diameter 45 mm and height 70 mm is resting vertically on one of its ends on
the HP. It is cut by a plane perpendicular to VP and inclined at 45º to HP. The plane
meets the axis at a point 35 mm above the base. Draw the development of the lateral
surface of the lower portion of the truncated cylinder.
6. A vertical chimney of 60 m diameter joins a roof sloping at an angle of 35º with the
horizontal. The shortest portion over the roof is 25 m. Determine the shape of the sheet
metal from which the chimney can be fabricated. Take a scale of 1:20.
7. A right circular cone of base diameter 50 mm and height 75 mm is resting on its base on
the ground. It is cut by a plane perpendicular to VP and inclined at 30º to HP. The cutting
plane bisects the axis of the cone. Draw the development of the lateral surface of the
truncated cone.
8. A cone of base diameter 50 mm and height 75 mm rests vertically on its base on the
ground. A string is wound around the curved surface of the cone starting from the left
extreme point on the base and ending at the same point. Find the shortest length of the
string required. Also trace the path of the string in front and top views.
9. A hexagonal pyramid of base side 30 mm and height 65 mm rests on its base on the
ground with a base edge parallel to VP. It is cut by a plane perpendicular to VP and
inclined at 55º to HP and meets the axis at a height of 30 mm from the base. Draw the
lateral surface development.
10. A square pyramid of base side 25 mm and altitude 50 mm rests on its base on the HP
with two side of the base parallel to VP. It is cut by a plane bisecting the axis and inclined
at 30º to the base. Draw the development of the lower part of the pyramid.
11. A pentagonal pyramid of base side 30 mm and height 70 mm is resting vertically on its
base on the ground with one of its base edge parallel to VP. It is cut by a plane
perpendicular to VP and parallel to HP at a distance of 35 mm above the base. Draw the
development of the lateral surfaces of the frustum of pyramid. Also show the sectional
plan view.
12. A pentagonal prism of base side 25mm and height 60mm stands on one of its ends on
the HP with a rectangular face parallel to the VP.A hole of diameter 30mm is drilled
centrally through the prism in such a way that the axis of the hole bisects the axis of the
prism at right angles. The axis of the hole is perpendicular to the VP. Draw the
development of the lateral surfaces of the prism.
13. A circular hole of diameter 30mm is drilled through a vertical cylinder of diameter 50mm
and height 65mm .The axis of the hole is perpendicular to the VP and meets the axis of
the cylinder at right angles at a height of 30mm above the base. Draw the development of
the lateral surface of the cylinder.

UNIT – V ISOMERTIC AND PERSPECTIVE PROJECTION
ISOMERTIC PROJECTION
1. A cylinder of height 65 mm and diameter 40 mm is resting on its base on the HP. It is cut
by a plane perpendicular to VP and inclined at 30º to the HP. The plane passes through a
point on the axis located at 25 mm from the top. Draw the isometric projection of the cut
cylinder.
2. A frustum of a square pyramid of bottom edge 50 mm, top edge 25 mm and height 50
mm. Draw the isometric projection of the frustum.
3. A hexagonal pyramid of base 25 mm and height 60 mm stands with its base on the HP
with an edge of base parallel to VP. A horizontal plane cuts the pyramid and passes
through a point on the axis at a distance of 30 mm from the apex. Draw the isometric
projection of the frustum of the pyramid.
4. A pentagonal pyramid of base side 30 mm and height 65 mm stands with its base on HP
with a side of base perpendicular to VP. It is cut by a plane inclined at 30º to HP and
perpendicular to VP and passes through a point at a distance of 30 mm from the apex.
Draw the isometric view of the bottom portion of the pyramid.
5. Draw the isometric projection of a hexagonal prism of base side 25 mm and height 50
mm when it rests on one of its ends on HP with two its base sides parallel to VP.
6. A cone of 50 mm diameter and height 70 mm stands on HP with its base. It is cut by a
cutting plane perpendicular to VP and inclined at 30º to HP, cutting the axis of the cone at
a height of 40 mm from the base. Draw the isometric view of the remaining part of the
cone.
PERSPECTIVE PROJECTION
1. A cube of side 40mm is resting on the ground on one of its faces, with a vertical
face in PP and the rest behind it. The central plane is located 50mm to the left of
the axis of the cube. This station point is 40mm in front of PP and 60mm above
GP. Draw the perspective view of the solid.
2. A square pyramid of side of base 50mm and altitude 70mm stands on the ground
vertically with an edge of base parallel to and 20mm behind PP. The station point
is 40mm in front of PP and 70mm above the ground. The central plane is located
45mm to the left of the axis of the solid. Draw the perspective view of the solid.
3. A Pentagonal pyramid of 30mm base side and axis height 40mm is standing on its
base on the ground Plane with a base side parallel to and 25mm behind PP. The
central plane is 35mm to the left of the apex and the station point is 40mm in front
of PP and 20mm above the GP. Draw the perspective view of the solid.
4. A cylinder of diameter 40mm and height 65mm rests with its base on the GP such
that the axis is 25mm behind the PP. The station point is 30mm in front of the PP
and 110mm above the GP and lies in a central plane which is 65mm to the right of
the axes of the solids. Draw the perspective view of the cylinder.
5. Draw the perspective projection of a square prism of base side 40 mm and height 50 mm.
One of the vertical lateral faces is parallel to PP and 30 mm behind it. The station point is
80 mm from the PP and 80 mm above the ground and 60 mm to the right of the axis of
the prism. (Use visual ray method).

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Question Bank -Engineering Physics-I

The Question bank for ENGINEERING PHYSICS I for first years under Anna University.

UNIT – 1 ULTRASONICS AND ITS APPLICATIONS
PART – A ( 2 Marks)
1. How are sound waves classified?
2. Mention the properties of ultrasonics.
3 . What is meant by Piezo electric effect?
4. What are the methods used for the detection of ultrasonics?
5 . What is meant by Cavitation?
6. What is acoustic grating?
7. Mention some of the industrial applications of ultrasonics?
8.. What is meant by SONAR?
9. State Doppler Effect.
10. Mention some of the medical applications of ultrasonics.
11 Name different scanning methods used in ultrasonics.
12. What is called Magnetostriction effect?
13 A quartz crystal of thickness 0.001m vibrates in its frequency.
Calculate its frequency of oscillation.
Given that E=7.9 X1010 N/m2 and =2650 kg/m3 for quartz crystal.
14. An ultrasonic interferometer is used to measure the velocity of
ultrasonic waves in sea water.
If the distance between two consecutive antinodes is 0.55 mm., then
Compute the velocity of the waves in the sea water.
The frequency of the crystal is 1.5 MHz.
15. Find the depth of a submerged submarine if an ultrasonic wave is
received after 0.33 sec from the time of transmission.
Given that the velocity of ultrasonic waves in sea water =1440 m/s
PART – B ( 16 Marks)
1. What is Magnetostriction effect ? Explain how it can be applied for the
production of ultrasonics using magnetostriction oscillator ( 4 + 12)
2. What is Inverse-Piezo electric effect? Explain with neat sketch, the
construction and production of ultrasonic waves using Piezo electric
oscillator. ( 4 + 12)
3 a) Explain the determination of velocity of ultrasonics using an acoustical
grating. (10 )
b) Explain in detail, how SONAR is employed to locate the object (6)
4 a) Draw a schematic diagram of a ultrasonic flaw detector and explain its
action (6)
b) Explain about three ultrasonic scanning methods with necessary display
diagrams. (10)


UNIT – II LASER AND ITS APPLICATIONS
PART – A ( 2 Marks)
1. What are the characteristics of laser?
2.. Distinguish between spontaneous and stimulated emission?
3. What is meant by population inversion?
4. What are different methods of pumping?
5. What are the conditions required for laser action?
6. Define active medium and active centre.
7. What is meant by an optical resonator?
8. What are the industrial applications of laser?
9. What are the differences between photography and holography?
10. What are the applications of laser in medical field?
11. What are the types of laser?
12. For InP laser diode, the wavelength of light emission is 1.55μm.
What is its band gap in eV?
13. Calculate the wavelength of emission of GaAs semiconductor laser whose
bandgap energy is 1.44 eV.
14. Calculate how many photons are emitted in a minute in a He-Ne laser
source, which emits light at a wavelength of 6328A0.The output power of this
source is 3mW.
15. What is the ratio of the stimulated emission to spontaneous emission at a
temperature of 280oC for sodium D-line?
PART – B ( 16 MARKS)
1. a) What is the principle of spontaneous and stimulated emission? (4)
b) Derive an expression for Einstein’s coefficient of stimulated and
spontaneous emission(8)
c) What is the principle of laser action? (4)
2. a) Explain about the different modes of vibrations in CO2 laser. (4)
b) Describe the construction and working of CO2 laser using energy level
diagram (12)
3. a) Discuss with theory, the construction and working of Homogeneous
semi conductor laser (8)
b) Describe the construction and reconstruction of a hologram (8)
4. a) Explain the construction and working of He-Ne Laser (8)
b) Describe the construction and working of Nd-YAG laser (8)

UNIT – III FIBRE OPTICS AND ITS APPLICATIONS
PART – A ( 2 Marks)
1. What is meant by Total Internal Reflection?
2. What are the conditions to be satisfied for total internal reflection?
3. Define acceptance angle and numerical aperture.
4. Distinguish between step index and graded index fibres.
5. What are the losses in optical fibres?
6. Mention any two fiber optic sources?
7. What is meant by photo detector?
8. What are the types of sensors used in the fiber optics?
9. What is called medical endoscope?
10. Mention the advantages of optical fiber communication over radio wave
communication.
11. Mention some of the medical applications of optical fibres.
12. Mention some of the engineering applications of optical fibres.
13. The refractive indices of core and cladding materials of an optical fibre are
1.54 and 1.5 respectively. Calculate the numerical aperture of the optical
fiber
14. Estimate NA when core refractive index is 1.48, relative refractive index
is 2 %. Also calculate the critical angle.
15. A fibre has a diameter of 6μm and its core refractive index is 1.47 and for
cladding it is 1.43.
How many modes can propagate into the fibre if the wavelength of the laser
source is 1.5 μm.
PART – B ( 16 MARKS)
1. a) Derive an expression for Numerical Aperture and angle of acceptance of a
fibre in terms of refractive indices of the core and cladding (10)
b) Describe the Crucible-Crucible technique for manufacturing an
optical fibre (6)
2. a) What are different types of optical fibres? (8)
b) Explain about losses in an optical fibre (8)
3. a) Explain with a neat block diagram of fibre optical communication system (8)
b) Explain about LED and Avalanche Photo diode used in fibre optics (8)
4. a) What are different types of optical sensors? Explain the working of any two
sensors (4+6)
b) Describe the construction and working of a fiber optic endoscope and give
its applications in medicine (6)

UNIT – IV : QUANTUM PHYSICS
PART – A ( 2 Marks)
1. What is a black body?
2. What are the postulates of planks quantum theory?
3. What is meant by matter waves?
4. What is called Compton shift?
5. What is the physical significance of a wave function?
6. Define magnifying power.
7. Define resolving power of a microscope.
8. What is wave function?
9. Mention the applications of electron microscope.
10. Write down the one dimensional schroedinger time independent wave
equation.
11. An electron at rest is accelerated through a potential of 5000 V. Calculate the
de-Broglie wavelength of matter waves associated with it.
12. Find the change in wavelength of an X-ray photon when it is scattered
through an angle of 1350 by a free electron.
13. Calculate the minimum energy of an electron can possess in an infinitely
deep potential well of width 4nm.
14. What is meant by degenerate and non-degenerate states?
15. Differentiate between optical microscope and electron microscope.
PART – B ( 16 MARKS)
1. a) What is meant by black body radiation ? (2)
b) Using quantum theory derive an expression for the average energy emitted
by the black body and deduce Wien’s displacement law and Rayleigh –
Jeans law (10 +4)
2. a) Define Compton Effect? (2)
b) Derive an expression for the wavelength of the scattered photon
(Compton Shift) (14)
3. a) Derive time independent Schroedinger wave equation (8)
b) Solve Schroedinger wave equation for a particle in a one dimensional box
and energy eigen value. (8)
4. a) Derive the equation for Schroedinger time – dependent wave equation (6)
b) Explain about Electron Microscope with a neat diagram (10)

UNIT – V : CRYSTAL PHYSICS
PART – A ( 2 Marks)
1. What are the differences between crystalline and non-crystalline materials?
2. Define unit cell.
3. Define space lattice.
4. Give the relation between the density of the crystal and lattice constant.
5. What are Bravais lattices?
6. Define atomic packing factor.
7. What are Miller indices?
8. What are lattice parameters?
9. Sketch (110) plane and (111) plane for a cubic crystal.
10. Calculate the lattice constant of Fe. Given: density of iron 7.86 kg/cm3,
atomic weight 55.85 and Avagadro’s number 6.023 x 1023 atoms /mol
11. Calculate the inter planar distance for (321) plane in simple cubic lattice with
inter atomic spacing equal to 4.12 A0
PART – B ( 16 MARKS)
1. Determine the atomic radius, coordination number and packing factor for BCC
and FCC structures (8+8)
2. a) Describe the structure of HCP Crystal (8)
b) Calculate the axial ratio (c/a) and atomic packing factor for HCP structure.
(8)
3. a) What are Miller Indices? (4)
b) Show that for a cubic lattice, the distance between two successive planes is
given by a
d hkl = --------------------
( h2 +k2 +l2 )1/2

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HS041 TECHNICAL ENGLISH - MODEL QUESTION PAPER

ANNA UNIVERSITY
MODEL QUESTION PAPER
B.E. / B.Tech DEGREE END SEMESTER EXAMINATION
First Semester
HS 041 - ENGLISH – I

Time : Three Hours Maximum : 100 Marks
Answer ALL questions.

PART A – (10 X 2 = 20 Marks)

1. Match the words in Column A with their meanings in Column B:

      A                                               B

(a) amalgamation                 giving out rays
(b) chip                              bringing together
(c) radiation                       getting completely exhausted
(d) depletion                      device composed of silicon


2. Fill in the blanks in the following sentences with the comparative forms of the adjectives given in brackets:
(a) Diesel is ____________ (heavy) than petrol.
(b) Diesel costs _________ (little) than petrol
(c) Pressurised heavy water reactor is _________ (small) than fast breeder reactor, and is, therefore ________ (compact) than the other

3. Write definitions of the following in a sentence each:

(a) A Tour
(b) A Computer

4. Complete the following sentences suitably:

(a) If there had been no rains last month __________________
(b) If there were no politicians to tempt people ______________

5. Fill in the blanks with the appropriate forms of words:

Adjectives Nouns Opposites (nouns)
Pure _______ ___________
__________ __________ Abnormality
__________ Reliability __________
__________ __________ Indestructibility

6. Fill in the blanks in the following passage with the appropriate forms of the verbs given in brackets:

I __________(be) an employee of the Central Government. I (start) my career in Bombay in 1955. In 1970 I (get) a transfer to Calcutta. Now I ___ (work) in Chennai.

7. A compound noun such as power source can be expanded as a source of power.
Similarly expand the following compound nouns using suitable prepositions.

(a) Mains electricity
(b) A control centre
(c) The research laboratory
(d) A water truck

8. Edit the following passage:
The aim of the authors are to describe about the benifits in computerization and to suggest solutions to the problem of unemployment.

9. Punctuate the following:
are there any advantages in the computerization of work in large establishments if so what are they

10. Add suitable endings to the following words to form adjectives:
(a) (i) suburb
(ii) continue
(iii) retract
(iv) vigour
(b) Use two of the adjectives you’ve formed in sentences of your own.

PART B - (5 x 16Marks = 80Marks)
11. Read the following report and answer the questions that follow it :

It has always been clear, of course that a properly designed media programme uses press, posters, printed leaflets and so on in proportions suitable to the nature of the product itself. In such a programme television occupies a relatively important place if the product is sold in small quantities, at a low price to the vast mass of the people. It is regarded as a quick acting medium, peculiarly suited to prompting ‘impulse purchases’.

Larger items, such as cars and refrigerators, may be more profitably advertised in the press or other media which are examined in greater detail and more at leisure than television ‘commercials’ can possibly be. Nevertheless, in most mass advertising campaigns, the media are used in combination with each other, in proportions which tend to be more and more carefully, and even scientifically, determined.

It is significant, in this connection, that the poster medium and outdoor advertising generally, are now staging something of a recovery, after sustaining what at first looked like being a severe blow at the time of the introduction of commercial television into the United Kingdom in 1955.

Media planning is only one of the branches of the British advertising business, where more exact methods of measurement and the close study of statistical data have made considerable headway in recent years. The marketing and research departments of the advertisers themselves, and of the agents who act as middlemen between advertisers and media owners in the case of more than 50 percent of British advertising business, are constantly expanding. These departments have for sometime included a number of University graduates. Usually with particular qualification in statistics and the movement of University trained men into advertising, the business is growing as is the study of advertising problems in the universities themselves, particularly in the departments of economics, psychology and sociology.

(a) Read the text and complete the following sentences choosing one of the options given below each sentence

1. A properly designed media programme uses
a) television – if the commodity is produced on a large scale.
b) different sources of media according to the type of the product.
c) a media which depends on the impulse.

2. The producers advertise larger items
a) on television ‘commercial’ to appeal to the people.
b) in press so that the customer may see details leisurely.
c) to make profit through poster advertisement

3. The poster medium and outdoor advertisement
a) were started in the United Kingdom in 1955.
b) are again becoming popular these days.
c) nowadays depend upon commercial television.

4. British advertising business
a) is one of the branches of media planning.
b) has a close study of roads and ways in recent years.
c) studies closely measuring methods of advertisement.

5. The marketing and research departments of advertisers
a) have employed a number of university graduates.
b) have appointed 50 percent middlemen.
c) have started departments of economics, psychology and sociology.

6. The advertising agents act as middlemen between
a) university students and advertisers.
b) media owners and economists.
c) those who are interested in advertising and those who own the media.


b) Give the most suitable meanings of the following words as they are used in the text choosing from the lists given below

1. Nevertheless
(i) neverbefore
(ii) never
(iii) however

2. severe blow
(i) air
(ii) a hard hit
(iii) a fight

3. sociology
(i) a study of ecology.
(ii) a study of the nature and development of society.
(iii) a study of the history of a nation.

4. headway
(i) progress in difficult circumstances.
(ii) the path of the leader.
(iii) the movement of one’s head.

5. in proportions
(i) in parts.
(ii) in correct relation to other things.
(iii) in proper terms.

6. a close study
(i) a thorough, detailed study.
(ii) a study of secret material.
(iii) the end of reading.

c) Read the text and answer the following questions:
1. What are the different media available for advertising products?
2. When were the poster medium and outdoor advertising affected terribly?
3. What are the reasons for the growth in advertising?

12. (a) Imagine that you have acquired a personal computer. Write a letter to your friend describing how you enjoy using it.

Or

(b) Imagine that you visited a factory where you had a chance to observe an industrial robot at work. Write a letter to your friend describing what you saw.

13. (a) Look at the following bar chart which describes the expenditure on education and defence as percentages of the total expenditure incurred by different countries. Write a paragraph presenting the information contained in it using expressions of comparison.
Or

(b) Look at the following bar chart which describes the sales figures of products A and B for the period from January to June in respect of a firm. Write a paragraph presenting the information contained in it using expressions of comparison.

14. (a) Write a paragraph of about 200 words comparing the life in a village with that in a city.

Or

(b) Do you think that the introduction of computers in industries will lead to unemployment? Express your ideas in a paragraph of about 200 words.

15. (a) Write a set of eight recommendations that will help the public save petrol.

Or

(b) Write a set of eight recommendations that should be followed to save water.

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