Model Papers for 2nd Year Auto

CONTENTS

CODE SUBJECTS PAGE #

Gen-111 Islamiat & Pakistan Studies 1-4

Gen-111 Islamiat & Pakistan Studies (Sindhi) 5-8

CH-213 Applied Chemistry 9-11

Math-213 Applied Mathematics-II 12-15

Phy-212 Applied Mechanics 16-19

MGM-232 Industrial Management & Economics 20-22

AD-212 Applied Thermodynamics 23-26

AD-223 Suspension Steering and Brakes 27-29

AD-234 Workshop Practice-II 30-32

AD-243 Problems in IC Engine 33-35

AD-252 Metrology 36-39

i

SINDH BOARD OF TECHNICAL EDUCATIONANNUAL EXAMINATION 2010

MODEL QUESTION PAPERISLAMIAT / PAKISTAN STUDIES (GEN-211)

D.A.E. AUTO & DIESEL TECHNOLOGY (SECOND YEAR)

Time Allowed: 3 Hrs. Total Marks: 50

SECTION ‘A’(Max. Marks 10 – Time 20 Minutes)

)5.3( 1

________

_______

________

________

0291 91 ________

________ 7291

________ 9391 22

)5.3(

6291

Board’s Roll No. _______

Script No. ____________

1

)3(

61 81 41 02

Signature of Candidate Seal of Institute Signature of Invigilator

2




Time Allowed: 2:40 Hrs. Total Marks B & C: 40

SECTION ‘B’ & ‘C’(Time 2:40 Hours)

SECTION ‘B’ (MARKS – 25)

)52( 2

3

SECTION ‘C’ (MARKS – 15)

)51(

2

3

4

5

4





SECTION ‘A’ (Max. Marks 10 – Time 20 Minutes)


Script No. ____________

5

Signature of Candidate Seal of Institute Signature of Invigilator6







7


8


MODEL PAPERAPPLIED CHEMISTRY (CH-213)


Roll No____________ Script No_________Time Allowed: 3 Hrs. Total Marks: 100


Q.1(a) Fill in the blanks.(1) pH of pure water is ______________(2) Valancy is the power of an ___________(3) The symbol of sodium is _____________(4) Beta rays carry ________ charge.(5) The S.I unit of Heat is _____________(6) Base turn Red litmus paper to _______(7) Daniel cell is the example of ______ cell

(b) Select one or more answer to each question as indicated.(1) Which of the element is halogen.

(a) H (b) F (c) O (d) Br(2) A Homogeneous mixture of two or more metal:

(a) Non-metal (b) Alloy (c) STEEL (d) None(3) The relative molecular mass of water

(a) 16 (b) 20 (c) 18 (d) 10(4) the substance which is solution or motor state Conduct Electricity is

(a)electrode (b) non-electrolyte (c) current (d) electrolyte(5) A molecule contain two or more

(a) atom (b) compound (c) element (d) symbol(6) The pH of Rain water is:

(a) 7 (b) 5 (c) 6 (d) 11(c) Write True or False.

(1) The positive ion are called anion.(2) Rusting is a slow but gradual process.(3) ‘Si’ and ‘Ge’ are the member of IV A group.(4) Acid react with metal to give salt and hydrogen gas.(5) Gases contract on heating.(6) Water is a universal solvent.(7) Kilogram is the S.I unit of mass.


9


MODEL PAPERAPPLIED CHEMISTRY (CH-213)


SECTION ‘B’ & ‘C’(Max. Marks 80 – Time 2:40 Hours)


Write short answers (any ten) of the following: (10 × 5 = 75)

Q.2 Write formula for the following compounds.

i) Aluminum nitrate ii) Ferric sulphate

iii) Zinc phosphate iv) Barium carbonate

v) Potassium ferric cyanide

Q.3 A quantity of oxygen occupies 0.5 litres at 29°C. What will be its volume at 40°C,

pressure remaining constant.

Q.4 Give the advantages and disadvantages of hard and soft water.

Q.5 Define radioactivity.

Q.6 Define symbol and formula with examples.

Q.7 Describe general properties of acids and bases.

Q.8 Define pH and describe pH scale.

Q.9 Define lubricants.

Q.10 Write the composition of following alloys.

i) Brass ii) German silver

iii) Bronze iv) Amalgam

Q.11 Explain any one method for removal of hardness on large scale.

Q.12 State periodic law of elements.

Q.13 Discuss the physical and chemical properties of acids and bases.

Q.14 Define isotopes and give their uses in different fields.

10

Q.15 Differentiate between natural and artificial radioactivity.

Q.16 Define ionic bond and covalent bond.


Answer in detail (any three) of the following: (2 × 15 = 30)

Q.17(a) State periodic law of elements.

(b) Explain the trend of properties of elements based on their position in periodic

table.

Q.18(a) Define oxidizing and reducing agents. Give at least three examples of each.

(b) Define basicity of acid and acidity of a base. Discuss monobasic, dibasic and

tribasic acid. Give at least two examples of each.

Q.19(a) Describe Rutherford’s atomic model. Give its drawback clearly.

(b) Enlist the characteristic properties of a period.

Q.20(a) What is meant by oxidation and reduction processes.

(b) Explain oxides. Give its types in brief.

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MODEL PAPERAPPLIED MATHEMATICS-II (MATH-213)

D.A.E. AUTO & DIESEL TECHNOLOGY (SECOND YEAR)Roll No___________ Script No.___________Time Allowed: 3 Hrs. Total Marks: 150


Q.1(a) Fill in the blanks.

(i)

(ii)

(iii)

(iv) The value of the function is maximum when

(v) Median for grouped data is – – – – – – – – – –.

(vi)

(vii) The equation 3x2 +3y2-3 =0 represent the equation of – – – – – – – – – –.

(b) State whether the following statements are True or False.

(i) If (x) = log x then f(ab) = f(a) + f(b)

(ii) Limit of f(x) = 3x2 +2, as x →1 is 5

(iii) An implicit function of x and y is of the form y = f(x)

(iv)

(v)

(vi) The point of inflection is that point at which a function becomes stationary.

(vii) We must arrange the data before calculating median.

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(c) Choose the correct answer from the words given in the parenthesis.

(i) The slope of the line through the points (2,3) and (4,2) is

a) 2 b) -2 c) d) -3

(ii) The order of the differential equation is

a) 2 b) 1 c) 0 d) 4

(iii)

a) 2 b) 0 c) 1 d) None of those

(iv) Mode of the values 3, 9, 5, 76, 11, 9, 720, 11 is

a) 7 b) 11 c) 9 d) 5

(v) 2nd derivative of tan x is – – – – – – –.

a) Sec2 x tan x b) 2 Sec2 x tan x

c) 2 tan x sec2x d) Sec2 x

(vi)

a) e-2 b) ae-axc) -ae-ax d) -xe-ax


13


MODEL PAPERAPPLIED MATHEMATICS-II (MATH-213)





Q.2 Attempt any ten questions from the following.

(i) Evaluate

(ii) If f(t)= , show that f = f(t)

(iii) If y = a cos + b Sin then show that y2+

(iv) If x3 + y3 = xy than find

(v) Find if x = + , y = 2 + 1.

(vi) Find

(vii) Find f(x) when f(x) = (x + 1)x.

(viii) Find the derivative of

(ix) Evaluate

(x) Evaluate

(xi) Evaluate

(xii) Find the centre and radius of the circle 5x2+5y2 -10x+20y-25=0

(xiii) Find the equation of line passing through the points (2,1) and (6,4)

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(xiv) Compute the arithmetic mean of the following:

15,20,27,40,51,81,21,16

(xv) Find the point, which divide the join of (2,1) and (3,6) externally in the ration

2:3

SECTION “C”

DESCRIPTIVE TYPE QUESTIONS

MAX. MARKS: 45

Attempt any two questions. All Questions carry equal marks.

Q.3(a) If y=x4+2x2 prove that

(b) Differentiate

Q.4(a) Examine the function defined by y= (x-2)2 (x-1)2 for extreme values.

(b) Calculate the standard deviation from the following:

Numbers 1 2 3 4 5 6 7

Frequency 10 13 18 21 15 8 6

Q.5 Evaluate the following integrals (any two)

(a) (Integrate by parts)

(b) (Integrate by trigonometric substitution)

(c) (Integrates by partial fraction)

Q.6(a) Find the equation of parabola whose vertex : (0,0) and focus: (3,0)

(b) Find the eccentricity the semi axes, the centre, the vertices and the coordinate of the

foci of the ellipse 25x2 + 9y2 = 225

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MODEL PAPERD.A.E. AUTO & DIESEL TECHNOLOGY (SECOND YEAR)

APPLIED MECHANICS (PHY-212)Roll No__________ Script No._________Time Allowed: 3 Hrs. Total Marks: 50



1. __________ is the branch which deals with the action of forces on bodies in

motion and at rest.

2. All quantities are measured in terms of some arbitrary but internationally

accepted units are called _____________ units.

3. Quantities that have magnitude only such as kilogram, meter and dollars are

referred to as ________ quantities.

4. ______________ in a force system is a state of balance about any point of the

moments of all the forces in the system.

5. The Law of __________ of forces states that if several forces acting on a body

are such that they can be represented by the various sides of a polygon are

taken n the same order then their resultant will be given magnitude and

direction by closing the sides of the polygon taken in the opposite order.

6. The turning or twisting effect of a force on a body is called _________.

7. A ______ wheel is a device used for variations in speed, during each cycle of

a machine (engine) and serves as a reservoir to store energy during the period.

8. When two objects are in contact under pressure, motion or attempted motion

of either object with respect to other in a direction parallel to the contacting

surfaces will be resisted called friction.

9. If an angle between the force and direction of the displacement is 90° then the

work done is _______

10. ___________ is the radial distance of a tooth from the pitch circle to the top of

the tooth from the pitch circle to the top of the tooth.

16


1. When the two elements of a pair are connected in such a way that one can only

slide relative to the other the pair is known as a Sliding Pair (Piston and

Cylinder).

2. Such a Lever or Beam Fixed at one end and while its other end is Free, the

Beam is called Cantilever Beam.

3. Linear Stress cause deformation in the body volume.

4. Hook’s Law states that “Without Elastic Limit, the Stress is Directly

Proportional to Stain”.

5. Time period in Periodic motion is defined as the distance of the body from the

mean position at any instant.

(b) Choose the correct answer from the words given in the parenthesis.

1. The Ratio between load lifted by the machine and effort applied to the

machine is called __________

(a) Mechanical Advantage (b) Velocity Ratio (c) Efficiency

2. _________ is product of the effort and distance moved by the effort in the

direction of effort.

(a) Efficiency (b) Output (c) Input

3. Simple Harmonic Motion is a kind of _________ motion, which acting

acceleration always acts toward mean position of equilibrium position.

(a) Periodic (b) Reciprocating (c) Straight-Line

4. The unit of Angular Acceleration is __________

(a) Meter / Second (b) centimeter / Second (c) Radian / Second2

5. ___________ is the property of a body to regain its original length, Size, or

Shape almost immediately when the deforming force have been removed.

(a) Tensile Strength (b) Elasticity (c) Compressive Strength

Signature of Candidate Seal of Institute Signature of Invigilator17



APPLIED MECHANICS (PHY-212)





i) What are the three uses of Dimensional Equations (Formula?)

ii) Define the following terms in Mechanics

(a) Coplanar forces (b) Non-Coplanar Forces

(c) Concurrent Forces (d) Non-Concurrent Forces

iii) Two Forces of 20 Newton and 30 Newton act a point with an angle of 60o

between them. Find the resultant force and the angle, which the resultant will

make with the force of 20 Newton.

iv) A Couple of Force 200Newton and arm 1.5Meter acts on a body. Calculate the

force of equivalent couple of 3 Meter arm

v) Define Stable Equilibrium, Unstable Equilibrium and Neutral Equilibrium?

vi) A Uniform bar 20 meter long is pivoted at it’s centre load of 25 Newton and

40 Newton are attached at points 4 meter and 7 meters respectively from one

end at distance from the end must at load of 45 Newton be attached to restore

equilibrium.

vii) Define Co-efficient of friction and force of friction

viii) A Force of 470.08 KN is applied to 1200 kg car. What is the car acceleration if

Co-efficient of rolling is 0.04?

ix) Define Work, Power and energy. Explain the meanings of the symbols used in

the formula “I.H.P = PLAN / 60 in SI SYSTEM OF UNIT

x) Make a list containing names of modes of transmission of power from one

shaft to another shaft.

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xi) A Pulley having radius of 0.135 meters is driven at 300 revolution / minutes

by a belt the tensions is tight and slack sides of the belt are 1560 Newton and

490 Newton respectively. Find the Power Transmitted?

xii) Define Mechanical Advantage and Efficiency of a Machine?

xiii) A Screw Jack has a pitch of 0.035 meters. The Load of 50,000 Newton is

lifted by an effort of 450 Newton. Find the Mechanical Advantage of it’s if the

length of Handle of the jack is 2.5 meter.

xiv) Define the following terms related to mechanics

(a) Vibratory Motion (b) Angular Motion (c) Simple Harmonic Motion

xv) Define the following types of Beams

(a) Simple Beam (b) Over Hanging Beam (c) Cantilever Beam

SECTION “C”


MAX. MARKS: 15


Q.3 What do you understand by Law of Polygon of Forces? Explain it.

Q.4 Define Crab and types of Winches. Explain each types?

Q.5 What do you understand by following terms?

(a) Kinematics Link or Elements

(b) Kinematics Pair

(c) Incompletely Constrained Motion

(d) Successfully Constrained Motion.

Q.6 Define the term “Height of Governor Drive”. Drive an expression for the height

in the case of Watt Governor. What are the limitations of Watt Governor?

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INDUSTRIAL MANAGEMENT & ECONOMICS (MGM-232)Roll No.___________ Script No.__________Time Allowed: 3 Hrs. Total Marks: 100



(i) ____________ is the study of those activities which involve money and

exchange transaction among the people.

(ii) That portion of income which is not spent on consumer’s goods is called

____________.

(iii) ____________ is a person who carries on business exclusively for himself.

(iv) ____________ is also called “Founder of Economics”.

(v) Demand and ____________ are the opposite forces.

(vi) Bank started in ____________.

(vii) ____________ acts as a banker’s bank.


(i) Bank is a financial institution.

(ii) According to marshal Economics is a social science.

(iii) There are seven factors of production.

(iv) Labour receives wages or reward.

(v) Public bears business losses.

(vi) The most acceptable metal as money is Gold.

(vii) Difficulty to store value was a defect of barter.


(i) Cheque is a written

a) Paper b) Application c) Order d) Document

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(ii) The most suitable type of organization for small business

a) Sole proprietorship b) Company

c) Partnership d) Firm

(iii) Bank also acts as an agent of his customers

a) Commercial b) State c) Central d) Non-scheduled

(iv) Public company is owned by

a) Partners b) Shareholders c) Government d) Directors

(v) Main objective of IDBP is promote __________.

a) Industry b) Country c) Natural resources d) Capital

(vi) Entrepreneur’s motive is

a) Rent b) Limited c) Profit d) Wages


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MODEL PAPERD.A.E. AUTO & DIESEL TECHNOLOGY (SECOND YEAR)INDUSTRIAL MANAGEMENT & ECONOMICS (MGM-232)


SECTION ‘B’ (MARKS – 50)Q.2 Attempt any ten questions from the following.

(i) Define planning.(ii) Define plant layout.(iii) Explain incentive.(iv) Define elements of cost.(v) What is meant by “hand”.(vi) Define “partnership”.(vii) State mixed economic system.(viii) Define money.(ix) State the functions of central bank.(x) Enlist the kinds of cheques.(xi) Explain IMF.(xii) What are the objectives of IDBP.(xiii) What is trade union?(xiv) Explain the demerits of international trade.(xv) What is meant by management?

SECTION “C”DESCRIPTIVE TYPE QUESTIONS

MAX. MARKS: 30

Attempt any two questions. All Questions carry equal marks.Q.3 Define economics? Describe importance of study of economics for technicians.Q.4 What is sole proprietorship, describe its merits and demerits.Q.5 Define business and explain its characteristics.Q.6 Describe principal media of advertisement use in the business world.

22


MODEL QUESTION PAPERD.A.E. AUTO & DIESEL TECHNOLOGY (SECOND YEAR)

APPLIED THERMODYNAMICS (AD-212)




1. The molecular kinetic energy of a substance is called _________

2. 273 K is equal to ________ degree Celsius.

3. 1mm.Hg is equal to _________.

4. Absolute pressure is the difference of __________________

5. The ratio of _______ and ________ is called gamma.

6. Work done during a constant volume process is equal to _____________


1. Volume is always constant in iso-baric process.

2. There are two iso-thermal and two adiabatic processes in Otto-cycle.

3. The thermal efficiency of Carnot cycle can not be 100%.

4. In isentropic process entropy is constant and there is no change in heat.

5. Air compressors are designed to handle vapours only.

6. A two stage compression gives higher pressure ratios.

7. Gas constant of all gases is always same.


1. Thermodynamics deals with the behavior of _________.

a) temperature and pressure b) gases

c) gases and vapours, temperature & pressure


Script No. ____________

23

2. The power at the engine shaft is __________.

a) shaft power b) brake power c) both a & b

3. The turbo compressor and turbo blower are _________.

a) similar in principle b) different in principle c) non of these

4. Torque and work have same units but are different in __________.

a) action b) shape c) direction

5. Brake horse power in an engine is measured by____________.

a) brake dynamo meter b) tachometer c) barometer

6. The Carnot efficiency depend on______________.

a) initial temperature b) final temperature

c) both initial and final temperatures

7. Volume is directly proportional to temperature if the ___________.

a) pressure is constant b) volume is constant c) both a and b


24



APPLIED THERMODYNAMICS (AD-212)





1. A vessel of capacity 5.3cu.m has 20kgof an ideal gas having molecular weight

25. The temperature of gas is 16 degree C. Find pressure of the gas.

2. Describe Carnot cycle with PV-diagram.

3. Can the efficiency of Carnot cycle be 100%? Discuss briefly.

4. Why work done during iso choric process is zero?

5. A system contains 0.08cu.m of gas at a pressure of 380kPa. It is expended at

constant pressure until its volume increased to 0.86cu.m. Find the work done

by the gas during expansion.

6. Classify the air compressors according to action.

7. A single stage single acting air reciprocating compressor is required to

compress 10cu.m air per minute at 18 degree C and 1.01 bars to 815kN/sq.m.

Find work done if compression is isothermal and find power required.

8. A two stroke cycle engine has m.e.p of 61N/sq.m and 1000rmp. If diameter

and stroke are 15cm and 25cm respectively, find indicated horse power.

9. 1kg of a gas initially at a temperature of 17 degree C is heated to 25 degree C.

The sp. heat of gas at constant volume is 712 N-m/kg/K. Find the change in

internal energy and heat if external work is 2150J.

10. Describe briefly the Otto cycle.

11. Define hyperbolic process. How it is identical to isothermal process, show

with PV-diagram.

12. Define types of pressure.

13. Define power and energy. What are fundamental forms of energy? Give units.

25

14. Define laws of thermodynamics. Why energy is conserved?

15. Define indicated power, brake power and air standard efficiency,

SECTION “C”


MAX. MARKS: 15


1. Prove that difference of specific heat at constant pressure and specific heat at constant

volume is equal to the gas constant. What are adiabatic and isentropic processes?

2. A diesel engine has a cylinder diameter of 300mm and stroke of 400mm. The

clearance volume is 3530cu.cm. The pressure of burnt gases at the beginning is 13.7

bars the engine follows the expansion law as PV1.147=C. Find the pressure at the end

of power stroke.

3. Deduce expression for the specific heat at constant volume and gas constant.

4. The cylinder of IC engine is 25cm in diameter and the stroke is 38cm, the clearance

volume is 1540cu.cm, the mass of gas is 0.041kg. At the commencement of the

working stroke the clearance volume is full of gas at a temperature of 316 degree C.

During working stroke the gas expands adiabatically. Find the temperature, work

done, change in internal energy, pressure in clearance volume and heat absorbed or

rejected by the gas at the end of expansion. Assume gamma = 1.4 and R =

0.287kJ/kg/K

26



STEERING, SUSPENSION & BRAKES (AD-223)




1. To remove a rack and pinion steering gear, separate the outer tie rod ends from

the _______ knuckles.

2. A hydraulic system can be used to increase or decrease _________ or motion.

3. The opposing force which is used to slow or stop the vehicle is called

________ action.

4. A _______________ valve is used in a power steering system to control the

exceeding oil pressure.

5. The springs support the __________ of the vehicle.

6. Brake fluid is a specially blended hydraulic fluid that transfers pressure to the

______________.


1. The included angle is also know as combined angle.

2. Electric brakes make use of electro magnets to provide the braking force.

3. Brake lines transfers fluid pressure from the wheel cylinder.

4. A bleeder screw is fitted to refill the brake lines with hydraulic brake oil.

5. Emergency brakes are also called parking brakes

6. The multi leaf spring is made of two flat steel plates.

7. A MacPherson strut is the most common type of suspension found on late

model cars.


Script No. ____________

27


1. Single leaf spring is usually used at the ___________ end of the vehicle.

(a) front (b) rear (c) both (d) none

2. _________ transmits turning motion from steering wheel to steering gear box.

(a) brakes (b) pipes (c) steering shaft (d) steering linkage

3. Power steering hoses are of __________ pressure.

(a) high (b) low (c) weak (d) medium

4. When steering wheel needs more effort to turn than normal it is said to be

_________ steering.

(a) easy (b) hard (c) light (d) rough

5. Master cylinder develops __________ for brake system.

(a) pressure (b) oil (c) friction (d) sealing

6. A disc brake assembly consists of a __________ brake pad.

(a) drum (b) ball joint (c) caliper (d) electric

7. The coil spring is made of spring steel which has been wound into a _______.

(a) pad (b) coil (c) ball joint (d) shaft


28



STEERING, SUSPENSION & BRAKES (AD-223)




i) Explain the method of ball joint lubrication servicing.ii) What is brake warning light switch?iii) How would you remove the master cylinder?iv) Define non-independent suspension.v) Explain what is Torsion bar.vi) What do you know about Pitman arm and Idler arm?vii) Explain the servicing of leaf spring.viii) What are the principles of wheel alignment?ix) How will you measure the caster?x) Define wheel balancing.xi) What is power brake vacuum boaster?xii) What do you mean by hard steering?xiii) Explain the stopping distance of a car.xiv) What is front end geometry?xv) How will you center a steering wheel?


MAX. MARKS: 30

Attempt any two questions. All Questions carry equal marks.Q.3 Explain the working of the Hydraulic brake system with a neat sketch.Q.4 What is steering linkage (worm type gearbox)?Q.5 Explain the components of suspension system.Q.6 Define air brake and electric brakes.Q.7 Explain the working of power steering with diagram.

29



WORKSHOP PRACTICE-II (AD-234)




1. ____________ gauge is used to check the engine compression.

2. A ___________ crane can lift more than 1000 pound of weight.

3. Turbo system help improve the ___________ of the vehicle.

4. A ____________ measures the engine speed.

5. Gas analyzer is used to __________ the air pollutants from the exhaust gas.

6. The ratio of the brake horsepower to the indicated horsepower is known as the

_________ efficiency.


1. The engine valves must open and close with definite timing relation to the

piston positions.

2. Engine sleeve cannot be removed or replaced.

3. The gasket must seal off two surfaces.

4. To reduce friction the bearing used in transmission are anti-friction bearing.

5. When the brake paddle is pressed, brake oil is forced into the master cylinders.

6. The wear of a tire depends on its location on the vehicle.

7. A torque wrench is used to remove a nut or bolt.


1. The ignition system must work perfect concern with the rest of the ________.

(a) engine (b) distributor (c) battery (d) speed


Script No. ____________

30

2. Toe-in and toe-out on turns causes the tire to be dragged side-ways, as it is

moving ________.

(a) backward (b) forward (c) fast (d) slow

3. Diesel engines have no ____________ system.

(a) power (b) petrol (c) electric (d) ignition

4. Adjusting the distributor to make the spark occur at the right time is called

_________.

(a) compression (b) ignition timing (c) valve timing (d) fast timing

5. A hammer is a __________ for striking an object.

(a) power tool (b) hand tool (c) hydraulic tool (d) electronic tool

6. Electronic tachometers are self contained units that use an ___________ signal

from the engine or transmission.

(a) electronic (b) mechanical (c) electric (d) light

7. Power is the rate at which work is _________.

(a) timed (b) wasted (c) started (d) done


31



WORKSHOP PRACTICE-II (AD-234)




i) Define box wrench.ii) Explain the magnetic bearing.iii) What are the characteristics of Tachometer in petrol engine?iv) What is Torque wrench?v) How will you perform tube inspection?vi) What is the design of mechanical gauge?vii) Explain the relief- valve service.viii) What is engine vacuum?ix) What is indicated and brake power?x) How will you perform oil filter service?xi) Explain the spiral wound gasket.xii) Explain the two-gas type analyzer. xiii) What is the method of combustion leakage test?xiv) Define turbo charger.xv) Explain the servicing of the crankshaft.


MAX. MARKS: 30

Attempt any two questions. All Questions carry equal marks.Q.3 Explain the operation of exhaust gas analyzer.Q.4 What is valve burning?Q.5 Explain the working of turbo engine.Q.6 Define the types of gaskets.Q.7 Explain the types of bearing.

32



PROBLEM IN I.C. ENGINE (AD-243)Roll No_________ Script No.__________Time Allowed: 3 Hrs. Total Marks: 100



1. The lubrication system reduces ___________ and wear on the internal parts of

the engine.

2. A supercharger is an air pump that increases the engine _________.

3. Both turbocharger and supercharger are called forced ________system.

4. An exhaust system quiets engine operation and carriers __________ fumes to

rear of car.

5. Excessive crankshaft and play is caused by worn main ___________.

6. ____________ is used to remove the pollutants from the engine exhaust.


1. A hemisphere combustion chamber is flat with respect to piston.

2. A squish piston better controls the knocking.

3. More air means that more fuel can be stuffed.

4. Ring gap allows the gases to pass to the crankcase.

5. Some connecting rods use cap screw without a nut.

6. The exhaust gases are cooled with the help of exhaust manifold.

7. Bolts and nuts can replace the gasket joints.


1. ___________ are small passage in the cylinder head and block which is used

for lubrication.

(a) Oil galleries (b) oil clearances (c) oil film (d) oil

33

2. Viscosity numbering system is used to rate the ___________ of engine oil.

(a) Oil weight (b) thickness (c) oil temperature (d) load

3. ___________ test is done for the checking of pressure in combustion chamber.

(a) Combustion leak (b) cooling pressure

(c) coolant leak (d) overheat

4. Due to wear of the piston pin, _________ occurs on both floating and pressure

in pin.

(a) clearances (b) knocking (c) double knocking (d) wear

5. Ring gap is the ____________ between the end of the rings.

(a) spaces (b) clearances (c) allowances (d) distance

6. Exhaust back pressure is the amount of pressure developed in the exhaust

system when the engine is __________.

(a) stopped (b) running (c) accelerating (d) de-accelerating

7. Anti freezing keeps the coolant from freezing at a temperature of _________.

(a) 75°C (b) 100°C (c) 32°C (d) 120°C


34



PROBLEM IN I.C. ENGINE (AD-243)




i) Explain lubrication ratio.ii) Explain the magnetic bearing.iii) Name the basic exhaust system.iv) Explain the exhaust manifold.v) Define the crankshaft.vi) Explain catalytic converter.vii) Explain anti-freeze system?viii) Discuss floating and locking of piston pin.ix) Identify piston ring problem.x) State the engine noises problems.xi) Identify the cylinder head problems.xii) Write the characteristics off combustion chamber.xiii) Discuss scuffing of the cylinders.xiv) Explain the un-controlled combustion chamber.xv) Enlist the types of combustion chambers (explain any one)


MAX. MARKS: 30

Q.3 Attempt any two questions. All Questions carry equal marks.i. Identify the piston problems.

ii. Explain the temperature scuffing effect on piston wearing.iii. Identify the cooling system, the problems and remedies.iv. Explain the state valve burning and breakage.

35



METROLOGY (AD-252)Roll No.____________ Script No._________Time Allowed: 3 Hrs. Total Marks: 50



1. _________ work on elasticity principle to measure pressure.

2. Kg-m/sq.sec is unit of ___________.

3. lb/sq.in is a unit of pressure in ________ system.

4. There are ________ foot in one kilometer.

5. ________ is an international system of measurement.

6. Outside caliper is a type of __________ tool.


1. Vernier caliper is used to measure the depth also.

2. The method of comparing the measuring tools with the standard items is called

inspection.

3. The job of the inspector is to compare the measuring tools with the standard

items.

4. Snap gauge is used to check the diameter of a hollow shaft.

5. Wire gauge is used to check the diameter of a wire.

6. Go-No-Go gauge is used to check the hole size.

7. Sprit level is used to check the extent of flatness and levels.


1. Metrology deals with.

a) distances b) powers c) measurements

36

2. Tolerance in metrology is.

a) required size b) unintentional size c) intentional size

3. Transfer tools are used to

a) measure the size b) check the size c) take a size onto the scales

4. If a vernier has 1mm as smallest division on main scale and 40 divisions on

vernier scale, the least count will be.

a) 0.005mm b) 0.035mm c) 0.025mm

5. Basic size is

a) designed size b) finished size c) biggest sizes

6. Which of the following is used for checking the tolerance of the rod?

a) odd leg caliper b) snap gauge c) both a and b

7. If a scale (ruler) reads 32/64 inch, it means.

a) 32nd line on 64 division line of inch b) 0.5 inch c) both a and b


37



METROLOGY (AD-252)





i. Describe briefly the tolerance and allowance with examples.

ii. Convert following

a. (a) 1N/sq.m to lb/sq.ft (b) 1bar to Pa (c) 1 N-m to

Kjoule

iii. How will you take measurement by a foot scale if you are asked to take 33/50

inch and 3/8 inch.?

iv. What are transfer tools? Why are they called so? Define any one.

v. Define fixed value measuring tools and enlist any three.

vi. If the least count of a vernier caliper is 0.025mm then how will you find the

number of vernier scale divisions, if main scale can read minimum size of

1mm?

vii. Why some measuring tools are called adjustable measuring tools? Enlist any

three.

viii. Define non-precision measurement and enlist some tools also.

ix. Define unilateral and bilateral tolerance with examples.

x. Why is it necessary to assign tolerance and when allowance is given?

xi. Can you make two lines parallel with a set square? Describe how?

xii. Define calibration. How it is done?

xiii. Why vernier height gauge is called precision measurement tool? How a

precise measurement is taken by it?

xiv. Why inside and outside calipers are used? And where are they used?

xv. Classify the fits.

38

SECTION “C”


MAX. MARKS: 15

Q. 3 Attempt any two questions. All Questions carry equal marks.

i. Why was it necessary to develop the unit system? Give detail of English system and

Metric system.

ii. Differentiate transfer tools and graduated tools. How combination square works?

iii. Classify errors. Why and how they appear? How to over come this problem?

iv. How will you use a micrometer screw gauge? Can we use a vernier caliper for same

purpose, if yes then how to use it?

39

Date post:	22-Nov-2014
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