Special Class Railway Apprentices' (SCRA) Exam Pattern & Syllabus
The SCRA examination 2020 will have following exam pattern:
Part I Written Examination for 600 marks which takes place in January usually.
Part II Personality Test has a maximum of 200 marks. You must qualify with the results of the written exam to take the Interview/Personality Test. This test takes place after announcement of the written exam results in March or April.
The details about the written exam (part I) is given below. Each paper's duration is 2 hours:
Subject 
Maximum marks 

PaperI

General Ability Test (English, General Knowledge and Psychological Test) 
200 

PaperII 
Physical Sciences (Physics and Chemistry) 
200 

PaperIII 
Mathematics 
200 

Total marks 
600 
Types of Questions and Marking Scheme
Questions on the test are objective (multiple choice answer) questions in English. For wrong answers receive a negative marking. Onethird of the marks assigned to a question are deducted for an incorrect answer. For questions left blank, no penalty is given. Guessing may not be advantageous, as you will be marked down for any wrong answers. Calculators are not permitted in the test centre. You must use a black ball pen only for writing & marking answers in the OMR sheet.
SCRA Syllabus
PaperI
(i) English
The questions will be designed to test the candidates understanding and command of the language.
(ii) General Knowledge
The questions will be designed to test a candidate’s general awareness of the environment around him and its application to society. The standard of answers to questions should be as expected of students of standard 12 or equivalent.
Man and his environment
 Evolution of life, plants and animals, heredity and environmentGenetics, cells, chromosomes, genes.
 Knowledge of the human bodynutrition, balanced diet, substitute foods, public health and sanitation including control of epidemics and common diseases. Environmental pollution and its control. Food adulteration, proper storage and preservation of food grains and finished products, population explosion, population control. Production of food and raw materials. Breeding of animals and plants, artificial insemination, manures and fertilizers, crop protection measures, high yielding varieties and green revolution, main cereal and cash crops of India.
 Solar system and the earth, Seasons, Climate, Weather, Soilits formation, erosion. Forests and their uses. Natural calamities cyclones, floods, earthquakes, volcanic eruptions. Mountains and rivers and their role in irrigation in India. Distribution of natural resources and industries in India. Exploration of underground minerals including Oil Conservation of natural resources with particular reference to the flora and fauna of India.
History, Politics and Society in India
 Vedic, Mahavir, Budhdha, Mauryan, Sunga, Andhra, Kushan. Gupta ages (Mauryan Pillars, Stupa Caves, Sanchi, Mathura and Gandharva Schools, Temple architecture, Ajanta and Ellora). The rise of new social forces with the coming of Islam and establishment of broader contacts. Transition from feudalism to capitalism. Opening of European contacts. Establishment of British rule in India. Rise of nationalism and national struggle for freedom culminating in Independence.
 Constitution of India and its characteristic features  Democracy, Secularism, Socialism, equality of opportunity and Parliamentary form of Government. Major political ideologiesdemocracy, socialism, communism and Gandhian idea of nonviolence. Indian political parties, pressure groups, public opinion and the press, electoral system.
 India’s foreign policy and nonalignmentArms race, balance of power. World organisationpolitical, social, economic and cultural. Important events (including sports and cultural activities) in India and abroad during the past two years.
 Broad features of Indian social system: The caste system, hierarchy  recent changes and trends. Minority social institution  marriage, family, religion and acculturation.
 Division of labour, cooperation, conflict and competition, Social control  reward and punishment, art, law, customs, propaganda, public opinion, agencies of social control  family, religion, state educational institutions; factors of social change economic, technological, demographic, cultural; the concept of revolution.
 Social disorganisation in India  Casteism, communalism, corruption in public life, youth unrest, beggary, drugs, delinquency and crime, poverty and unemployment.
 Social planning and welfare in India, community development and labour welfare; welfare of Scheduled Castes and backward classes.
 Money  Taxation, price, demographic trends, national income, economic growth. Private and Public Sectors; economic and noneconomic factors in planning, balanced versus imbalanced growth, agricultural versus industrial development; inflation and price stabilization, problem of resource mobilisation. India’s Five Year Plans.
(iii) Psychological Test
The questions are formulated to check your basic intelligence and mechanical aptitude.
PaperII
(i) Physics
 Length measurements using vernier, screw gauge, spherometer and optical lever. Measurement of time and mass.
 Straight line motion and relationships among displacement, velocity and acceleration.
 Newton's laws of motion, Momentum, impulse, work, energy and power.
 Coefficient of friction.
 Equilibrium of bodies under action of forces. Moment of a force, couple. Newton’s law of gravitation. Escape velocity. Acceleration due to gravity.
 Mass and Weight; Centre of gravity, Uniform circular motion, centripetal force, simple Harmonic motion. Simple pendulum.
 Pressure in a fluid and its variation with depth. Pascal’s law. Principle of Archimedes. Floating bodies, Atmospheric pressure and its measurement.
 Temperature and its measurement. Thermal expansion, Gas laws and absolute temperature. Specific heat, latent heats and their measurement. Specific heat of gases. Mechanical equivalent of heat. Internal energy and First law of thermodynamics, Isothermal and adiabatic changes. Transmission of heat; thermal conductivity.
 Wave motion; Longitudinal and transverse waves. Progressive and stationary waves, Velocity of sound in gas and its dependence on various factors. Resonance phenomena (air columns and strings).
 Reflection and refraction of light. Image formation by curved mirrors and lenses, Microscopes and telescopes. Defects of vision.
 Prisms, deviation and dispersion, Minimum deviation. Visible spectrum.
 Field due to a bar magnet, Magnetic moment, Elements of Earth’s magnetic field. Magnetometers. Dia, para and ferromagnetism.
 Electric charge, electric field and potential, Coulomb’s law.
 Electric current; electric cells, e.m.f. resistance, ammeters and voltmeters. Ohm’s law; resistances in series and parallel, specific resistance and conductivity. Heating effect of current.
 Wheatstone’s bridge, Potentiometer.
 Magnetic effect of current; straight wire, coil and solenoid electromagnet; electric bell.
 Force on a currentcarrying conductor in magnetic field; moving coil galvanometers; conversion to ammeter or voltmeter.
 Chemical effects of current; Primary and storage cells and their functioning, Laws of electrolysis.
 Electromagnetic induction; Simple A.C. and D.C. generators. Transformers, Induction coil,
 Cathode rays, discovery of the electron, Bohr model of the atom. Diode and its use as a rectifier.
 Production, properties and uses of Xrays.
 Radioactivity; Alpha, Beta and Gamma rays.
 Nuclear energy; fission and fusion, conversion of mass into energy, chain reaction.
(ii) Chemistry
Physical Chemistry
 Atomic structure; Earlier models in brief. Atom as at three dimensional model. Orbital concept. Quantum numbers and their significance, only elementary treatment.
 Pauli’s Exclusion Principle. Electronic configuration. Aufbau Principle, s.p.d. and f. block elements.
 Periodic classification only long form. Periodicity and electronic configuration. Atomic radii, Electronegativity in period and groups.
 Chemical Bonding, electrovalent, covalent, coordinate covalent bonds. Bond Properties, sigma and Pie bonds, Shapes of simple molecules like water, hydrogen sulphide, methane and ammonium chloride. Molecular association and hydrogen bonding.
 Energy changes in a chemical reaction. Exothermic and Endothermic Reactions. Application of First Law of Thermodynamics, Hess’s Law of constant heat summation.
 Chemical Equilibria and rates of reactions. Law of Mass action. Effect of Pressure, Temperature and concentration on the rates of reaction. (Qualitative treatment based on Le Chatelier’s Principle). Molecularity; First and Second order reaction. Concept of Energy of activation. Application to manufacture of Ammonia and Sulphur trioxide.
 Solutions : True solutions, colloidal solutions and suspensions. Colligative properties of dillute solutions and determination of Molecular weights of dissolved substances. Elevation of boiling points. Depressions of freezing point, osmotic pressure. Raoult’s law (nonthermodynamic treatment only).
 ElectroChemistry : Solution of Electrolytes, Faraday’s Laws of Electrolysis, ionic equilibria, Solubility product.
 Strong and weak electrolytes. Acids and Bases (Lewis and Bronstead concept). pH and Buffer solutions.
 Oxidation  Reduction; Modern, electronics concept and oxidation number.
 Natural and Artificial Radioactivity: Nuclear Fission and Fusion. Uses of Radioactive isotopes.
Inorganic Chemistry
Brief Treatment of Elements and their industrially important compounds :
 Hydrogen : Position in the periodic table. Isotopes of hydrogen. Electronegative and electropositive character. Water, hard and soft water, use of water in industries, Heavy water and its uses.
 Group I Elements : Manufacture of sodium hydroxide, sodium carbonate, sodium bicarbonate and sodium chloride.
 Group II Elements : Quick and slaked lime. Gypsum, Plaster of Paris. Magnesium sulphate and Magnesia.
 Group III Elements: Borax, Alumina and Alum.
 Group IV Elements : Coals, Coke and solid Fuels, Silicates, Zolitis semiconductors. Glass (Elementary treatment).
 Group V Elements. Manufacture of ammonia and nitric acid. Rock Phosphates and safety matches.
 Group VI Elements. Hydrogen peroxide, allotropy of sulphur, sulphuric acid. Oxides of sulphur.
 Group VII Elements. Manufacture and uses of Fluorine, Chlorine, Bromine and Iodine, Hydrochloric acid. Bleaching powder.
 Group O. (Noble gases) Helium and its uses.
 Metallurgical Processes : General Methods of extraction of metals with specific reference to copper, iron, aluminium, silver, gold, zinc and lead. Common alloys of these metals; Nickel and manganese steels.
Organic Chemistry
 Tetrahedral nature of carbon, Hybridisation and sigma pie bonds and their relative strength. Single and multiple bonds. Shapes of molecules. Geometrical and optical isomerism.
 General methods of preparation, properties and reaction of alkanes, alkenes and alkynes, Petroleum and its refining. Its uses as fuel.
 Aromatic hydrocarbons : Resonance and aromaticity. Benzene and Naphthalene and their analogues. Aromatic substitution reactions.
 Halogen derivatives : Chloroform, Carbon Tetrachloride, Chlorobenzene, D.D.T. and Gammexane.
 Hydroxy Compounds : Preparation, properties and uses of Primary, Secondary and Tertiary alcohols, Methanol, Ethanol, Glycerol and Phenol, Substitution reaction at aliphatic carbon atom.
 Ethers; Diethyl ether.
 Aldehydes and ketones : Formaldehyde, Acetaldehyde, Benzaldehyde, acetone, acetophenone.
 Nitro compounds amines: Nitrobenzene TNT, Anlline, Diazonium Compounds, Azodyes.
 Carboxylic acid : Formic, acetic, denezoic and salicylic acids, acetyl salicylic acid.
 Esters : Ethylacerate, Methyl salicylates, ethylbenzoate.
 Polymers : Polythene, Teflon, Perpex, Artificial Rubber, Nylon and polyester fibers.
 Nonstructural treatment of Carbohydrates, Fats and Lipids, amino acids and proteins  Vitamins and hormones.
PaperIII
Mathematics
1. Algebra:
Concept of a set, Union and Intersection of sets, Complement of a set, Null set, Universal set and Power set, Venn diagrams and simple applications. Cartesian product of two sets, relation and mapping  examples, Binary operation on a set  examples.
Representation of real numbers on a line. Complex numbers: Modulus, Argument, Algebraic operations on complex numbers. Cube roots of unity. Binary system of numbers, Conversion of a decimal number to a binary number and viceversa. Arithmetic, Geometric and Harmonic progressions. Summation of series involving A.P., G.P., and H.P.. Quadratic equations with real coefficients. Quadratic expressions: extreme values. Permutation and Combination, Binomial theorem and its applications.
Matrices and Determinants: Types of matrices, equality, matrix addition and scalar multiplication  properties. Matrix multiplication  noncommutative and distributive property over addition. Transpose of a matrix, Determinant of a matrix. Minors and Cofactors. Properties of determinants. Singular and nonsingular matrices. Adjoint and Inverse of a squarematrix, Solution of a system of linear equations in two and three variableselimination method, Cramers rule and Matrix inversion method (Matrices with m rows and n columns where m, n less than equal to 3 are to be considered).
Idea of a Group, Order of a Group, Abelian group. Identitiy and inverse elementsIllustration by simple examples.
2. Trigonometry:
Addition and subtraction formulae, multiple and submultiple angles. Products and factoring formulae. Inverse trigonometric functions  Domains, Ranges and Graphs. DeMoivre's theorem, expansion of Sin n 0 and Cos n 0 in a series of multiples of Sines and Cosines. Solution of simple trigonometric equations. Applications: Heights and Distance.
3. Analytic Geometry (two dimensions)
Rectangular Cartesian. Coordinate system, distance between two points, equation of a straight line in various forms, angle between two lines, distance of a point from a line. Transformation of axes. Pair of straight lines, general equation of second degree in x and y  condition to represent a pair of straight lines, point of intersection, angle between two lines. Equation of a circle in standard and in general form, equations of tangent and normal at a point, orthogonality of two cricles. Standard equations of parabola, ellipse and hyperbola  parametric equations, equations of tangent and normal at a point in both cartesian and parametric forms.
4. Differential Calculus
Concept of a real valued function  domain, range and graph. Composite functions, one to one, onto and inverse functions, algebra of real functions, examples of polynomial, rational, trigonometric, exponential and logarithmic functions. Notion of limit, Standard limits  examples. Continuity of functions  examples, algebraic operations on continuous functions. Derivative of a function at a point, geometrical and physical interpretation of a derivative  applications. Derivative of sum, product and quotient of functions, derivative of a function with respect to another function, derivative of a composite function, chain rule. Second order derivatives. Rolle's theorem (statement only), increasing and decreasing functions. Application of derivatives in problems of maxima, minima, greatest and least values of a function.
5. Integral Calculus and Differential Equations:
Integral Calculus : Integration as inverse of differentiation, integration by substitution and by parts, standard integrals involving algebraic expression, trigonometric, exponential and hyperbolic functions. Evaluation of definite integralsdetermination of areas of plane regions bounded by curves applications.
Differential equations : Definition of order and degree of a differential equation, formation of a differential equation by examples. General and particular solution of a differential equation, solution of first order and first degree differential equation of various types  examples. Solution of second order homogeneous differential equation with constant coefficients.
6. Vectors and its applications:
Magnitude and direction of a vector, equal vectors, unit vector, zero vector, vectors in two and three dimensions, position vector. Multiplication of a vector by a scalar, sum and difference of two vectors, Parallelogram law and triangle law of addition. Multiplication of vectors  scalar product or dot product of two vectors, perpendicularity, commutative and distributive properties. Vector product or cross product of two vectors  its properties, unit vector perpendicular to two given vectors. Scalar and vector triple products. Equations of a line, plane and sphere in vector form  simple problems. Area of a triangle, parallelogram and problems of plane geometry and trigonometry using vector methods. Work done by a force and moment of a force.
7. Statistics and probability:
Statistics : Frequency distribution, cumulative frequency distribution  examples. Graphical representation  Histogram, frequency polygon  examples. Measure of central tendency  mean, median and mode. Variance and standard deviation  determination and comparison. Correlation and regression.
Probability : Random experiment, outcomes and associated sample space, events, mutually exclusive and exhaustive events, impossible and certain events. Union and Intersection of events. Complementary, elementary and composite events. Definition of probability : classical and statistical  examples. Elementary theorems on probability  simple problems. Conditional probability, Bayes' theorem  simple problems. Random variable as function on a sample space. Binomial distribution, examples of random experiments giving rise to Binomial distribution.
Personality Test
Those going on to the Personality Test will interviewed by a Board. Questions will span academic and extramural topics and matters of general interest. The objective of the Personality Test is to assess the candidate's initiative, leadership and other qualities.