,Catagory No: 96/2010

Syllabus

PART - I

compressibility, vapour pressure, cohesion, adhesion, surface tension and capillarity. Intensity of

pressure at a point - pressure head - units of pressure - Pascal's law

Atmospheric pressure - Gauge pressure - Absolute pressure - vacuum pressure - problems -

Measurements of atmospheric pressure - simple mercury barometers - pressure measuring devices

- peizometer tubes, manometers - U-tube - simple differential and inverted tubes only -

Mechanical Gauge - Bourdon tube pressure gauge. Pressure on plane surfaces immersed in liquid.

Total pressure and center of pressure on horizontal, vertical and inclined surfaces immersed in

liquids. Pressure on lock, gates, sluice gate.

Kinematics and Dynamics of fluid flow

Introduction - types of fluid flow - steady and unsteady flow - uniform and non-uniform flow -

laminar and turbulent flow - compressible and incompressible flow - rotational and ir-rotational

flow - one, two and three dimensional flow - rate of flow or discharge - equation of continuity of

a liquid flow - simple problems - energy of a liquid in motion - potential energy - kinetic energy

- pressure energy - total energy - total head of liquid in motion - Euler's equation of motion -

Bernoulli's equation from Euler's equation - assumptions - simple problems - practical

applications of Bernoulli's equation - venturimeter - Orifice meter - pitot tube .

Buoyancy and Floatation

Buoyancy - Centre of Buoyancy - Types equilibrium of floating bodies, Metacentre and

metacentric height

Flow through Orifices , Notches, Weirs and Mouth pieces

Definition of orifice, types of orifices - (based size, shape flow condition) - definition of vena

contracta - hydraulic coefficients - Cv, Cc, Cd - experimental determination. Submerged and

partially submerged orifices. Large rectangular orifice - expression for discharge - derivation.

Time for emptying a prismatic tank through an orifice at bottom or in the side- head loss due to

sudden enlargement and sudden contraction at the entrance of pipe from large vessel, at the exit of

a pipe line, obstruction in a pipe line derivation of expression for head loss due to enlargement &

contraction - Types of notches - rectangular, triangular and trapezoidal notches. Discharge overrectangular, triangular and trapezoidal notches. Classifications - definition - discharge over

rectangular weir, end contraction in weir effect of end contraction over discharge - Francis

formula and Bazin's formula for end contraction- velocity of approach - problems broad crested

weir - problems submerged weir description. Mouth piece - different types - external and

internal- cylindrical.

Flow through pipes and channels

Frictional loss in pipes - Chezy's and Darcy's formulae - Derivation and problems Hydraulic

gradient and total energy line-Water hammer and its effect (description only) Syphon. Flow

through Channels Wetted perimeter Hydraulic mean depth- uniform and non-uniform flow -

Chezy's formula.

Turbines and Pumps

Introduction-development of water Turbines-classification-impulse Turbine-Pelton

wheelcomponents- velocity triangle and work done. Workdone-power produced efficiency-number

of jets - design of Pelton wheel—governing—other impulse Turbines .

Reaction turbines - components—difference between impulse& Reaction—Classification of

Reaction Turbines -discharge—power produced—efficiencies—Francis Turbine—Kaplan

Turbine—Draught tubes—other reaction turbines.

Characteristics of Turbines -Significance—specific speed—selection of Turbine—selection based

on specific speed and head of water—characteristic curve for Impulse and reaction Turbines

Centrifugal pump - Introduction - types of casing—piping system of CP—work done

manometric head—efficiencies - discharge—power required to drive -multistage pumps -simple

problems. Performance—specific speed of CP—selection of pumps based on specific speed and

head— cavitation—priming.

Reciprocating pumps - Types-comparison of CP&RP-discharge-slip-power required-air

vessels-indicator diagram of RP

Hydraulic control elements and components

Control valves - Functions - classifications - ratings - Describe the working of pressure controll

valves viz, relief valves - pilot operated relief valve - poppet valve - sequence valve Direction

control valves - types - sliding spool type - rotary spool type - check valves - 1 way, 2 way, 3

way directional control valves, pilot operated check valve, solenoid control valve. Flow control

valves - types - gate, globe, pressure compensated butterfly valves, non return valve, application

circuits of control valves. Seals - packings - materials for seals and packings - purpose of sealing

. Filters - types - necessity of filtration of fluids - intensifier - motors and accumulators - purpose

of accumulators viz, shock suppressions, fluid makeup, leakage compensation, emergency power

and holding - types of accumulators - weight loaded, spring loaded, gas loaded Hydro-electric Installation

Layout - intake works, pressure tunnel, penstock, surge tank, action of surge tank anchor

blocks and tailrace.

brittleness, creep, fatigue, stiffness, ductility, malleability, elasticity and plasticity. Electrical

Properties: - Resistance and Resistivity, conductance and conductivity, capacitance. Magnetic

properties: - Magnomotive force, rellectance, permeance, hysterisis Thermal properties: - Specific

heat, thermal conductivity, thermal resistance, and thermal diffusivity. Chemical properties: -

Corrossion resistance, acidity and alkalinity.Physical properties: - density, viscosity, colour, finish,

porosity.

Testing of Engineering Materials - Destructive testing: - tension and compression test. Hardness

test: - Brinell, rock well, Vickers - impact test, fatigue test and creep test. Nondestructive testing: -

Radio graphic, ultrasonic inspection,

Organic and ceramic materials- Introduction, classification of rubber: - natural and synthetic

rubber, Plastic: - thermosetting and thermoplastic with examples - requirements of plastic and

elastimers and their uses. Classification of ceramics - properties and uses - glass building stone,

refractory materials, abrasive - materials, concrete.

Definition, Classification, Two stroke engines, Two stroke petrol engines, Four stroke engines,

Four stroke diesel engines (construction and working using simple line sketches), Four stroke

petrol engines, Functions of different parts of I.C. Engines (No sketch required), Comparison

between - Two stroke and four stroke engines, Petrol and diesel engines, Testing of IC engines -

determination of indicated power - brake power - mechanical efficiency - indicated thermal

efficiency brake thermal efficiency - specific fuel consumption -heat balance sheet.

Air Standard Cycles

Assumption, Air standard efficiency Brief explanation with P-V diagrams and derivation of air

standard efficiency of Carnot Cycle, Otto cycle, Diesel cycle, Joule cycle, Brief explanation of

dual combustion cycle with P-V diagram (No derivation of air standard efficiency), Simple and

direct problems using standard expressions Air Compressors

a. Introduction: Function of air compressors - uses of compressed air .Classification of

compressors: Working of reciprocating (single stage and two stage) compressors, Rotary

compressors (fans, blowers), centrifugal compressors and axial flow compressors P-V diagram of

single stage and two stage compressors - derivation of work done - power required to drive the

compressor (simple problems) - inter coolers - advantages of multistage compressors. Efficiencies

of air compressor - mechanical efficiency, isothermal efficiency, isentropic efficiency, volumetric

efficiency, derivation of volumetric efficiency in terms of clearance volume and stroke volume,

effect of clearance on volumetric efficiency

Modes of heat transfer - conduction, convection and radiation. Fields of applications of heat

transfer. Thermal conduction, Fourier's law of thermal conduction, thermal conductivity,

conduction through a plane wall, simple problems. Thermal radiation - Reflection, absorption, and

transmission of radiation, absorptivity, reflectivity and transmissivity. Concept of black body.

Stefan's Boltzman's law of total radiation, concept of grey body, Thermal convection - Newton -

Rikhman equation Q = hAt, Free convection, forced convection

Heat exchangers - Function of heat exchangers, types of heat exchangers - Recuperator type and

regenerative type, parallel flow, counter flow and cross flow. Concept of Logarithmic mean

temperature difference (LMTD) and AMTD. LMTD for parallel flow and counter flow heat

exchangers (no derivation). Simple problems to calculate heat transfer by LMTD method.

Types of Fuels - its value in engineering - classification of fuels - solid fuels - liquid fuels -

gaseous fuels - merits and demerits of Gaseous fuels requirements of a good fuel.

Calorific value of fuels - Gross or higher calorific value - net calorific value - (simple problems)

- Determination of calorific values - bomb calorimeter- Gas calorimeter . Combustion of fuels -

Atomic theory- structure - Combustion equation of solid fuels - Minimum mass of air required for

combustion.- Mass of carbon in flue gases. - Mass of flue gas per kg of fuel burnt - Flue gas

analysis - Orsat apparatus

For More Details Visit www.keralapsc.gov.in

Syllabus

PART - I

**1. Fluid Mechanics and Hydraulic Machines****Definition of density, specific volume, specific gravity, viscosity, kinematic & dynamic viscosity,**

compressibility, vapour pressure, cohesion, adhesion, surface tension and capillarity. Intensity of

pressure at a point - pressure head - units of pressure - Pascal's law

Atmospheric pressure - Gauge pressure - Absolute pressure - vacuum pressure - problems -

Measurements of atmospheric pressure - simple mercury barometers - pressure measuring devices

- peizometer tubes, manometers - U-tube - simple differential and inverted tubes only -

Mechanical Gauge - Bourdon tube pressure gauge. Pressure on plane surfaces immersed in liquid.

Total pressure and center of pressure on horizontal, vertical and inclined surfaces immersed in

liquids. Pressure on lock, gates, sluice gate.

Kinematics and Dynamics of fluid flow

Introduction - types of fluid flow - steady and unsteady flow - uniform and non-uniform flow -

laminar and turbulent flow - compressible and incompressible flow - rotational and ir-rotational

flow - one, two and three dimensional flow - rate of flow or discharge - equation of continuity of

a liquid flow - simple problems - energy of a liquid in motion - potential energy - kinetic energy

- pressure energy - total energy - total head of liquid in motion - Euler's equation of motion -

Bernoulli's equation from Euler's equation - assumptions - simple problems - practical

applications of Bernoulli's equation - venturimeter - Orifice meter - pitot tube .

Buoyancy and Floatation

Buoyancy - Centre of Buoyancy - Types equilibrium of floating bodies, Metacentre and

metacentric height

Flow through Orifices , Notches, Weirs and Mouth pieces

Definition of orifice, types of orifices - (based size, shape flow condition) - definition of vena

contracta - hydraulic coefficients - Cv, Cc, Cd - experimental determination. Submerged and

partially submerged orifices. Large rectangular orifice - expression for discharge - derivation.

Time for emptying a prismatic tank through an orifice at bottom or in the side- head loss due to

sudden enlargement and sudden contraction at the entrance of pipe from large vessel, at the exit of

a pipe line, obstruction in a pipe line derivation of expression for head loss due to enlargement &

contraction - Types of notches - rectangular, triangular and trapezoidal notches. Discharge overrectangular, triangular and trapezoidal notches. Classifications - definition - discharge over

rectangular weir, end contraction in weir effect of end contraction over discharge - Francis

formula and Bazin's formula for end contraction- velocity of approach - problems broad crested

weir - problems submerged weir description. Mouth piece - different types - external and

internal- cylindrical.

Flow through pipes and channels

Frictional loss in pipes - Chezy's and Darcy's formulae - Derivation and problems Hydraulic

gradient and total energy line-Water hammer and its effect (description only) Syphon. Flow

through Channels Wetted perimeter Hydraulic mean depth- uniform and non-uniform flow -

Chezy's formula.

Turbines and Pumps

Introduction-development of water Turbines-classification-impulse Turbine-Pelton

wheelcomponents- velocity triangle and work done. Workdone-power produced efficiency-number

of jets - design of Pelton wheel—governing—other impulse Turbines .

Reaction turbines - components—difference between impulse& Reaction—Classification of

Reaction Turbines -discharge—power produced—efficiencies—Francis Turbine—Kaplan

Turbine—Draught tubes—other reaction turbines.

Characteristics of Turbines -Significance—specific speed—selection of Turbine—selection based

on specific speed and head of water—characteristic curve for Impulse and reaction Turbines

Centrifugal pump - Introduction - types of casing—piping system of CP—work done

manometric head—efficiencies - discharge—power required to drive -multistage pumps -simple

problems. Performance—specific speed of CP—selection of pumps based on specific speed and

head— cavitation—priming.

Reciprocating pumps - Types-comparison of CP&RP-discharge-slip-power required-air

vessels-indicator diagram of RP

Hydraulic control elements and components

Control valves - Functions - classifications - ratings - Describe the working of pressure controll

valves viz, relief valves - pilot operated relief valve - poppet valve - sequence valve Direction

control valves - types - sliding spool type - rotary spool type - check valves - 1 way, 2 way, 3

way directional control valves, pilot operated check valve, solenoid control valve. Flow control

valves - types - gate, globe, pressure compensated butterfly valves, non return valve, application

circuits of control valves. Seals - packings - materials for seals and packings - purpose of sealing

. Filters - types - necessity of filtration of fluids - intensifier - motors and accumulators - purpose

of accumulators viz, shock suppressions, fluid makeup, leakage compensation, emergency power

and holding - types of accumulators - weight loaded, spring loaded, gas loaded Hydro-electric Installation

Layout - intake works, pressure tunnel, penstock, surge tank, action of surge tank anchor

blocks and tailrace.

**2. Engineering materials and properties****Metallic and non-metallic properties such as: - Mechanical, strength, hardness, toughness,**

brittleness, creep, fatigue, stiffness, ductility, malleability, elasticity and plasticity. Electrical

Properties: - Resistance and Resistivity, conductance and conductivity, capacitance. Magnetic

properties: - Magnomotive force, rellectance, permeance, hysterisis Thermal properties: - Specific

heat, thermal conductivity, thermal resistance, and thermal diffusivity. Chemical properties: -

Corrossion resistance, acidity and alkalinity.Physical properties: - density, viscosity, colour, finish,

porosity.

Testing of Engineering Materials - Destructive testing: - tension and compression test. Hardness

test: - Brinell, rock well, Vickers - impact test, fatigue test and creep test. Nondestructive testing: -

Radio graphic, ultrasonic inspection,

Organic and ceramic materials- Introduction, classification of rubber: - natural and synthetic

rubber, Plastic: - thermosetting and thermoplastic with examples - requirements of plastic and

elastimers and their uses. Classification of ceramics - properties and uses - glass building stone,

refractory materials, abrasive - materials, concrete.

**3. Basic Mechanical Engineering****Fundamentals of I.C. Engines**

Definition, Classification, Two stroke engines, Two stroke petrol engines, Four stroke engines,

Four stroke diesel engines (construction and working using simple line sketches), Four stroke

petrol engines, Functions of different parts of I.C. Engines (No sketch required), Comparison

between - Two stroke and four stroke engines, Petrol and diesel engines, Testing of IC engines -

determination of indicated power - brake power - mechanical efficiency - indicated thermal

efficiency brake thermal efficiency - specific fuel consumption -heat balance sheet.

Air Standard Cycles

Assumption, Air standard efficiency Brief explanation with P-V diagrams and derivation of air

standard efficiency of Carnot Cycle, Otto cycle, Diesel cycle, Joule cycle, Brief explanation of

dual combustion cycle with P-V diagram (No derivation of air standard efficiency), Simple and

direct problems using standard expressions Air Compressors

a. Introduction: Function of air compressors - uses of compressed air .Classification of

compressors: Working of reciprocating (single stage and two stage) compressors, Rotary

compressors (fans, blowers), centrifugal compressors and axial flow compressors P-V diagram of

single stage and two stage compressors - derivation of work done - power required to drive the

compressor (simple problems) - inter coolers - advantages of multistage compressors. Efficiencies

of air compressor - mechanical efficiency, isothermal efficiency, isentropic efficiency, volumetric

efficiency, derivation of volumetric efficiency in terms of clearance volume and stroke volume,

effect of clearance on volumetric efficiency

Modes of heat transfer - conduction, convection and radiation. Fields of applications of heat

transfer. Thermal conduction, Fourier's law of thermal conduction, thermal conductivity,

conduction through a plane wall, simple problems. Thermal radiation - Reflection, absorption, and

transmission of radiation, absorptivity, reflectivity and transmissivity. Concept of black body.

Stefan's Boltzman's law of total radiation, concept of grey body, Thermal convection - Newton -

Rikhman equation Q = hAt, Free convection, forced convection

Heat exchangers - Function of heat exchangers, types of heat exchangers - Recuperator type and

regenerative type, parallel flow, counter flow and cross flow. Concept of Logarithmic mean

temperature difference (LMTD) and AMTD. LMTD for parallel flow and counter flow heat

exchangers (no derivation). Simple problems to calculate heat transfer by LMTD method.

Types of Fuels - its value in engineering - classification of fuels - solid fuels - liquid fuels -

gaseous fuels - merits and demerits of Gaseous fuels requirements of a good fuel.

Calorific value of fuels - Gross or higher calorific value - net calorific value - (simple problems)

- Determination of calorific values - bomb calorimeter- Gas calorimeter . Combustion of fuels -

Atomic theory- structure - Combustion equation of solid fuels - Minimum mass of air required for

combustion.- Mass of carbon in flue gases. - Mass of flue gas per kg of fuel burnt - Flue gas

analysis - Orsat apparatus

**NOTE:**- It may be noted that apart from the main topics listed above, questions from other topics prescribed for the educational qualification of the post may also appear in the question paper. There is no undertaking that all the topics above may be covered in the question paper.

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