Maharashtra SSC Workshop Science & Calculation ITI study plan

Convert fluently between fractions, decimals and percentages in both directions for values used in trade work (e.g. 0.375 to 3/8 to 37.5%), and simplify ratios to their lowest terms.

Solve percentage problems of the three standard types - finding the part, the whole and the rate - including percentage increase, decrease and simple profit/loss on material cost.

Compute perimeter and area of rectangles, triangles, parallelograms, trapeziums and circles, keeping units consistent and rounding only at the final step.

Apply the area formulas to composite workshop shapes (L-brackets, plates with holes removed) by splitting them into standard figures and subtracting cut-outs.

Set out every calculation in a fixed four-line format: given data, formula, substitution, answer with unit.

Calculate volume and total surface area of prisms, cylinders, cones, pyramids and spheres, and of hollow sections such as pipes and bushes.

Convert confidently between mm, cm, m and between cm³, litres and m³, including mass-from-volume using density.

Identify and name standard screw thread elements (major, minor and pitch diameters, pitch, flank angle, lead) and compute pitch from threads per inch and vice versa.

Compute taper angle, taper ratio (conicity) and the set-over or tailstock offset needed to turn a given taper over a given length.

Distinguish clearance, interference and transition fits and state which limit-and-fit designation family (hole basis vs shaft basis) applies to a given assembly.

Derive and use the cutting-speed relation V = πDN/1000 with V in m/min and D in mm, solving for any one of the three quantities when the other two are given.

Compute spindle RPM for drilling, turning and milling operations on mild steel, and adjust the chosen RPM to the nearest available machine step, stating the resulting actual cutting speed.

Calculate machining time for a single pass from length of cut, feed per revolution (or feed per minute) and RPM, including approach and over-travel allowances.

State the six trigonometric ratios, use Pythagoras and the sine/cosine rules to solve right-angled and general triangles arising in shop layouts.

Resolve a force or a dimension into components at a given angle, and use sine-bar-style calculations to check a taper or angle setting.

Convert between mass, volume and density for common workshop materials and use the result to estimate the mass of a bar, plate or casting from its dimensions.

Distinguish mass from weight (kgf/N) and compute force, work, power and energy in SI units, including efficiency of a simple machine from output/input.

Apply the mechanical-equivalent idea to convert between power, work and time in motor-driven and manual operations (e.g. hoisting a load at a given speed).

Convert between Celsius, Fahrenheit and Kelvin, and compute heat quantity using specific heat capacity and latent heat for simple heating and melting problems.

Compute current, voltage, resistance and power in simple series and parallel DC circuits using Ohm's law and P = VI.

Classify ferrous and non-ferrous metals and their common alloys (plain carbon steels, cast iron, stainless steel, brass, bronze, aluminium alloys) and state one typical shop use for each.

Explain the meaning of hardness, toughness, ductility, malleability, brittleness, elasticity and machinability, and predict which property drives a given material choice.

Relate simple heat treatment (annealing, normalising, hardening, tempering) to the property change it produces and the colour or temperature cue used in the shop.

Identify the six simple machines and compute mechanical advantage, velocity ratio and efficiency for a lever, inclined plane, screw jack and pulley block.

Name and select fasteners - bolts, nuts, studs, machine screws, self-tapping screws, rivets, keys, circlips and washers - for a stated joint, and explain thread locking and washer function.

Compute gear-train ratios for simple, compound and worm drives, and find the driven-shaft speed and torque relationship for a given train.

Calculate module, pitch-circle diameter, addendum, dedendum and centre distance for a pair of spur gears, and check a gear pair for correct meshing.

Explain magnetism fundamentals - poles, magnetic field, permeability, electromagnet - and relate them to the working of a solenoid, relay, motor and magnetic chuck.

Select and read the correct measuring instrument for a task: steel rule, vernier caliper, micrometer, dial indicator, feeler gauge, sine bar, and state its least count and typical use.

Compute least count of a vernier scale and read a micrometer thimble, and identify common measurement errors (zero error, parallax, temperature effect).

Apply the standard safety sequence for hand and power tools, and state the correct PPE for grinding, welding, chipping and lifting tasks.

Identify workshop hazards and their controls: machine guarding, emergency stop, lockout, fume and dust extraction, safe handling and storage of oils, solvents and compressed gas.

Explain trade-related science behind everyday practice - why coolants are used, why clearance is needed in a bearing, why sharp tools cut cooler, why ventilation matters with solvents.

Re-solve a mixed set of 20 rapid-fire calculation items drawn from fractions, percentage, ratio, area and volume under timed conditions.

Classify workshop waste for segregation and disposal and state two environment rules that affect a fitter or machinist.

Assemble a single one-page formula sheet covering all eleven domains from memory, then verify it against your earlier notes and correct every gap.

Complete three full-length timed mock papers under exam conditions, marking each and logging every wrong answer by domain.

Re-work every logged wrong answer from first principles until you can solve it without notes.

Drill the two weakest domains, as revealed by the mock scores, with 15 targeted problems each.

Rehearse the calculation habits that earn marks: units on every answer, formula stated before substitution, sensible rounding, and a quick order-of-magnitude sanity check.