Tuesday 18 November 2014
Tuesday 16 September 2014
Monday 10 December 2012
Applied-Thermodynamics-Short-Questions-and-Answers
http://www.scribd.com/doc/115038780/Applied-Thermodynamics-Short-Questions-and-Answers
Solid-Mechanics-Short-Questions-and-Answers
http://www.scribd.com/doc/115983736/Solid-Mechanics-Short-Questions-and-Answers
Saturday 10 November 2012
Engineering Chemistry
(Established
under section 3 of UGC Act, 1956)
Course
& Branch: B.E/ B. Tech – Common to ALL Branches
Title
of the paper: Engineering Chemistry
Semester:
I Max. Marks: 80
Sub.Code:
6C0072 (2007) Time: 3 Hours
Date: 14-05-2008 Session: AN
PART –
A (10
x 2 = 20)
Answer
All the Questions
1. What are scales and sludges? Give its
chemical composition.
2. What is break-point chlorination?
3. Distinguish between electrolytic and
electrochemical cell.
4. What is electromotive series? Write its
significance.
5. Why steel screws in a brass marine hardware
corrode?
6. Give any
four pretreatment methods of metal surfaces before coating.
7. What is RDX?
8. What is liquid propellant? Give example.
9. Define antioxidant. Give two examples.
10. What is the use of monosodium glutamate and
saccharin?
PART – B
(5
x 12 = 60)
Answer All the Questions
11. (a)
Describe in detail the ion-exchange process of softening hard water?
(b) What are boiler troubles? How are they caused?
Suggest steps to minimize the boiler troubles.
(or)
12. (a) Explain the steps involved in the
domestic water treatment.
(b) Explain the modern method with a neat diagram to
convert sea water to soft water.
13. (a) What is
single electrode potential? How the single electrode potential of Zn is
measured using saturated calomel electrode? (b) Write the applications of emf
series. How the solubility of sparingly soluble salt is determined?
(or)
14. (a) How the
emf of a cell can be determined by potentiometric method?
(b) Explain potentiometric titrations using
ferrous/ferric systems.
15. (a)
Differentiate chemical and electrochemical corrosion with suitable examples.
(b) Describe the mechanism of differential aeration
corrosion, taking pitting as an example.
(or)
16. (a) How do
you control corrosion by proper designing and selection of materials.
(b) Explain electroless plating with a suitable
example.
17. (a) Write
the classification of explosive. Give examples with uses.
(b) Write the preparation of TNT and Nitroglycerine
with uses.
(or)
18. (a) How the propellants are classified?
Explain any two.
(b) Compare solid and liquid propellants.
19. (a) Give the biochemical effects of carbon
monoxide and lead.
(b) What is food additive? Why they are added? Give
three examples.
(or)
20. (a) Write
note on preservatives with example.
(b)
Write the risk analysis of diethyl pyrocarbonate and butylated hydroxyanisole.
Mechanics of Machines
(Established
under section 3 of UGC Act, 1956)
Course
& Branch: B.E - Mechanical & Production/ Aeronautical
Title
of the paper: Mechanics of Machines
Semester:
IV Max. Marks: 80
Sub.Code:
6C0070
Time: 3 Hours
Date: 28-04-2008 Session: FN
PART – A
(10 x 2 = 20)
Answer All the Questions
1. Define: Grashoff’s law.
2. Draw a four bar mechanism and show that it has one degree of
freedom as per Kutzbach criterion.
3. What is meant by balancing?
4. What is the cause for swaying coupling?
5. Construct the displacement diagram for the follower motion to be
cycloidal.
6. Define law of gearing?
7. Write the equation to determine the
efficiency of a screw jack.
8. Define velocity ratio.
9. What is viscous damping?
10. Define single degree of freedom.
PART – B (5
x 12 = 60)
Answer All the Questions
11. Sketch and explain the following inversions of a double slider
crank chain.
(i) Elliptic trammel
(ii) Scotch yoke mechanism
(iii) Oldham ’s coupling.
(or)
12. A four bar linkage has following dimensions:
Crank AO2 = 150mm Link AB
Link BO4 = 300 mm Link O2O4
= 200 mm
Link O2O4 is
fixed.
Find the angular
acceleration of links AB and BO4 when the crank is rotating with a constant angular
velocity of 200 rad/s counter clockwise and also positioned 45° to horizontal.
13. Four masses m1= 90 kg; m2 = 180 kg; m3
= 210 kg and m4 = 140 kg are fixed to the cranks of 250 mm radius
and revolve in planes 1,2,3 and 4 respectively.
The angular position of the cranks in the planes 2,3 and 4 with respect
to the crank in plane 1 are 70°, 140° and 245° taken in the same
sense. The distance of planes 2,3 and 4
from plane 1 are 500 mm, 1500 mm and 2500 mm respectively. Determine the position and magnitude of the
balancing mass at the radius at 300 mm in planes L and M located at the middle
of planes 1 and 2 and middle of planes 3 and 4 respectively.
(or)
14. A four cylinder vertical
engine has cranks 300 mm long. The
planes of rotation of the first, third and fourth cranks are 750 mm, 1050mm and
1650 mm respectively from that of the second crank and their reciprocating
masses are 150 kg, 400 kg and 250 kg respectively. Find the mass of the reciprocating parts for
the second cylinder and relative angular position of the cranks in order that
the engine may be in complete primary balance.
15. The following data are for the a disc cam mechanism with roller
follower:
Minimum radius of the cam = 35 mm.
Lift of the follower = 40 mm.
Roller diameter = 15 mm.
During ascent = 120°, Dwell = 80°
During descent = 80°, Dwell
= 80°
(or)
16. A pair of involute spur gears with 16° pressure angle and pitch of module 6 mm is
in mesh. The number of teeth in pinion
is 16 and its rotational speed is 240 rpm.
The gear ratio is 1.75. In order
to avoid the interference, determine
(iv) Addenda on pinion and
wheel.
(v) Length of path of contact.
(vi) Maximum velocity of sliding on either side of pitch
point.
17. A square threaded bolt of root diameter 22.5 mm and pitch 5 mm is
tightened by screwing a nut whose mean diameter of bearing surface is 50
mm. If the coefficient of friction
between nut and bolt is 0.1 and nut and bearing surface is 0.16, determine the
force required at the end of spanner 500 mm long when the load on the bolt is
10 kN.
(or)
18. A belt drive is required to transmit 12 kW from a motor running at
720 rpm. The belt is 12 mm thick and has
a mass density of 0.003 gm/mm3. Safe stress in the belt is not to
exceed 2.5 N/mm2. Diameter of driving pulley is 250 mm where as the
speed of the driven pulley is 240 rpm.
The two shafts are 1.25 m apart.
Coefficient of friction is 0.25.
Determine the width of the belt.
19. A cantilever shaft of 50 mm diameter, 300 mm long has a disc of
100 kg attached to the free end. The
Young’s modulus is 200 GN/m2. Determine (i) Frequency of
longitudinal vibration (ii) Frequency of transverse vibration.
(or)
20. A shaft 25 mm diameter and 0.5 m long carries a mass of 2 kg at
its mid point. The density of shaft material = 40 x 103 kg/m3,
E = 200 GN/m2. Assume shaft is freely supported. Calculate the whirling speed of shaft?
Machine Drawing
(Established
under section 3 of UGC Act, 1956)
Course
& Branch: B.E - Mechanical / Mechanical& Production/
Aeronautical
Title
of the paper: Machine Drawing
Semester:
III Max. Marks: 80
Sub.Code:
15307(2002/2003/2004/2005)/6C0067 Time: 3 Hours
Date: 06-05-2008 Session: AN
PART – A
(30)
Answer All the Questions
1. A steel pin having a normal diameter of 30mm is to be an easy running fit in the bore of a bronze bush.
Sketch free hand indicating the
limit dimensions for the steel pin and the bore of the bush. (10)
2. Draw the three views of ISO threaded hexagonal bolt 150mm long, 24mm diameter and a thread length of
60mm with a hexagonal nut. Indicate all
the proportions and the calculated dimensions. (10)
3. Sketch the symbols for the following characteristics used for form tolerances
(a)
Symmetry (b)
Perpendicular (c) Coaxiality
(d) Straightness (e)
Circularity. (5)
4. Sketch the conventional representation for the following machine
elements.
1. External threads
2. Helical torsion spring
3. Disc spring
4. Bevel gears
5. Rack and pinion (5)
PART – B (1
x 50 = 50)
Answer All the Questions
5. The detail of a screw jack is shown in the figure. Assemble the parts of the jack and draw the following views
of the assembly.
1.
Front view in half section.
2. Top view.
Fluid Mechanics & Machinery
(Established
under section 3 of UGC Act, 1956)
Course
& Branch: B.E - Mechanical/ Mechanical & Production/ Aeronautical
Title
of the paper: Fluid Mechanics &
Machinery
Semester:
III Max. Marks: 80
Sub.Code:
6C0066 Time: 3 Hours
Date: 29-04-2008 Session: AN
PART – A
(10 x 2 = 20)
Answer All the Questions
1. Define specific gravity of a fluid.
2. State Newton
3. State Bernoulli’s
theorem for steady flow of an incompressible fluid.
4. What is the difference between a notch and a weir?
5. What are hydraulic coefficients? Name them.
6. Explain the term: Equivalent pipe.
7. Why priming of pump is necessary?
8. Define slip of a reciprocating pump.
9. What is a draft tube?
10. Differentiate between the turbines and pumps.
PART
– B (5
x 12 = 60)
Answer All the Questions
11. (a) The
capillary rise in the glass tube is not to exceed 0.2mm of water. Determine its
minimum size, given that surface tension for water in contact with air is
0.0725 N/m. (4)
(b) A flat plate of area 1.5 x 104 cm2
is pulled with a speed of 0.4 m/s relative to another plate located at a
distance of 0.15mm form it. Find the force and power required to maintain this
speed, if the fluid separating them is having viscosity as 0.1 Ns/m2. (8)
(or)
12. (a) define the following: Buoyancy and
Metacentre. (4)
(b) A uniform body of size 3m long x 2m wide x 1m deep
floats in water. What is the weight of the body if the depth of immersion is
0.8m? Determine the metacentric height. (8)
13. (a) state
the assumptions made in the derivation of Bernoulli’s equation. (4)
(b) The
water is flowing through a pipe having diameters 20 cm and 10cm at a section 1
and 2 respectively. The rate of flow through the pipe is 35 1/s. the section 1
is 6m above datum and section 2 is 4m above datum. If the pressure at section 1
is 39.24 N/cm2, find the intensity of pressure at section 2. (8)
(or)
14. (a) A
horizontal venturimeter with inlet diameter 20cm and throat diameter 10cm is
used to measure the flow of water. The pressure at inlet is 17.658 N/cm2
and the vacuum pressure at the throat is
30cm of mercury. Find the discharge of water through Venturimeter. Take Cd=0.98
(8)
(b) What
are the advantages of triangular notch over the rectangular notch? (4)
15. (a)
Calculate (i) the pressure gradient along flow,
(ii) the average velocity, and
(iii) the discharge for an oil of viscosity 0.02 Ns/m2
flowing between two stationary parallel plates 1m wide maintained 1cm apart.
The velocity midway between the plate is 2m/s. (9)
(b) A rectangular orifice 0.9m wide and 1.2m deep is
discharging water form a vessel. The top edge of the orifice is 0.6m below the
water surface in the vessel. Calculate the discharge through the orifice if
coefficient of discharge is 0.6. (3)
(or)
16. The
difference in water surface levels in two tanks, which are connected by three
pipes in series of lengths 300m, 170m and 210m and of diameter 30cm, 20cm, 40cm
respectively is 12m. Determine the rate of flow of water if coefficient of
friction are 0.005, 0.0052 and 0.0048 respectively, considering:
(a) minor losses also (b)
neglecting minor losses.
17. The cylinder
bore diameter of a single acting reciprocating pump is 150mm and its stroke is
300mm. The pump runs at 50 rpm and lifts water through a height of 25m. The
delivery pipe is 22m long and 100mm in diameter. Find the theoretical discharge
and the theoretical power required to run the pump. If the actual discharge is
4.2 1/s, find the % slip. Also determine the acceleration head at the beginning
and middle of the delivery stroke.
(or)
18. The outer
diameter of an impeller of a centrifugal pump is 40cm and outlet width 5cm. The
pump is running at 800 rpm and is working against a total head of 15m. The vane
angle at outlet is 40° and manometric efficiency id 75% Determine:
(a) Velocity of flow at outlet
(b) velocity of water leaving the vane, and
(c) angle made by the absolute velocity at outlet with
the direction of motion at outlet, and
(d) discharge.
19. A Pelton
wheel is to be designed for the following specifications: Power = 16kW, Head =
380m, Speed = 750 rpm. Overall efficiency = 86%, jet diameter is not exceed one
sixth of the wheel diameter. Determine:
(a) the wheel diameter
(b) No of jets required, and
(c) Diameter of the jet. Take coefficient velocity as
0.985 and speed ratio as 0.45.
(or)
20. A Francis
turbine has inner diameter of wheel, 0.6 times the outer diameter. Water enters
the turbine at 12° tangents to the wheel. Blade angles are radial at inlet. Velocity of
flow is constant through the turbine and is 2.5m/sec. Speed of the runner is
280 rpm. The width of the wheel at the inlet is 10cm. 5% of area of the flow is
blocked by the runner blades. Determine:
(a) Working head,
(b) diameters at inlet and outlet,
(c) blade angle at outlet,
(d) power produced.
Engineering Mathematics – IV
(Established
under section 3 of UGC Act, 1956)
Course
& Branch: B.E /B.Tech- Common to ALL Branches
Title
of the paper: Engineering Mathematics –
IV
Semester:
IV Max. Marks: 80
Sub.Code:
6C0054/401 Time: 3 Hours
Date: 22-04-2008 Session: FN
PART – A
(10 x 2 = 20)
Answer All the Questions
1. Find Fourier series given f(x) = x in - p £ x £ p.
2. Define complex form of Fourier Series.
3. Form Partial differential equation by eliminating ‘f’ from
z =
f(x3 – y3)
4. Find the complete solution of 
5. State any
two assumptions in the derivation of one dimensional wave equation.
6. Define a2 in ut
= a2 uxx.
7. State the
two dimensional heat equation in Cartesian as well as polar co-ordinates.
8. Write the
three positive solutions of the Laplace
equation in polar co-ordinates.
9. State
Convolution Theorem of Fourier Transform.
10. If F{f(x)}
= 
then Prove that 
then Prove that
PART – B (5 x 12 = 60)
Answer All the Questions
11. Find the fourier Series expansion of f(x) of
period ‘l’.
Hence deduce the sum of the series 
(or)
12. Find first three harmonics in the Fourier
Series of y = f(x)
|
x
|
0
|
1
|
2
|
3
|
4
|
5
|
6
|
|
y
|
1.0
|
1.4
|
1.9
|
1.7
|
1.5
|
1.2
|
1.0
|
13. Solve (y + z) p + (z + x) q = x + y.
(or)
14. Solve (D2 – 2DD/ + D/2)z
= x2 y2 ex+y where 
15. Solve ytt
= a2yxx 0 £ x £ l, t > 0 subject to y (0, t) = 0 y(l, t) = 0, yt(x, 0) = 0
(or)
16. A rod of
length 20cm has its ends A and B kept at 30°C and 90°C respectively until steady state conditions prevail.
If the temperature at each end is then suddenly reduced to 0°C and maintained so, find the temperature u(x, t) at a
distance ‘x’ from A, at any time ‘t’.
17. An
uniformly ling metal plate in the form of an area is enclosed between the lines
y = 0 and y = p for positive values of x. The temperature is zero along the edges y =
0 and y = p and the edge at
infinity. If the edge x = 0 s kept at temperature ‘ky’, find the steady state
temperature distribution in the plate.
(or)
18. A semi
circular plate of radius a has its boundary dimeter kept at temperature zero
and circumference at f(q) = k, 0 < q < p. Find the steady state temperature at any distribution point of the
plate.
19. Find Fourier Transform of the distribution
Hence evaluate 
(or)
20. Find
Fourier Sine and Cosine Transform of e-ax a > 0, and hence find
Fourier Sine Transform of 
and Fourier cosine
transform of 
and Fourier cosine
transform of
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