Punjab PSEB Sr. Sec. NSQF Plumbing (Advanced Plumbing Technician) study plan

Match each of the five jointing methods (threaded, soldered, brazed, solvent-cement, fusion) to the pipe materials and service conditions where it is the correct choice, and justify each match in one sentence.

Cut, ream and thread galvanised steel pipe to the correct thread length using a pipe vice, die head and cutting lubricant, then check the thread with a gauge and assemble a screwed joint with the right sealant.

Solder a copper capillary joint using lead-free solder and correct flux, controlling heat so the joint is fully filled without overheating the tube.

Braise a copper joint with a filler that melts above 450 degrees C, and state how brazing differs from soldering in temperature, filler and joint strength.

Make solvent-cement joints in PVC and CPVC applying primer and cement in the correct order, and state the cure time before pressure testing for each size.

Compare GI steel, copper, CPVC, PPR, HDPE, PVC and cast iron on pressure rating, temperature limit, joining method and typical application, and record the comparison in a table.

Name and state the function of at least 25 fittings and valves, including elbows, tees, reducers, couplings, unions, nipples, caps, traps, gate/ball/check valves and pressure-reducing valves.

Select pipe diameter and wall thickness for a given fixture load using the fixture-unit method and a velocity limit of about 1.5 to 2.4 m per second.

Prepare a material take-off with quantities, sizes and a 5 percent wastage allowance from a hand-sketched layout of your own.

Distinguish direct supply from indirect tank supply, and gravity from pumped distribution, listing one advantage and one limitation of each.

Size cold water distribution pipes for a household using fixture units, developed length and a stated velocity limit, showing every step of the calculation.

Lay out a hot water distribution system, choose pipe insulation for the run, and state the maximum dead-leg length you would accept between the heater and the farthest outlet.

Calculate the required overhead storage tank capacity for a stated occupancy and daily per-person demand, including fire reserve if applicable.

Pressure-test a completed water supply line at 1.5 times working pressure and record the test pressure, duration and result.

Explain the one-pipe and two-pipe drainage systems and state where each is permitted, including the soil stack, waste stack and vent stack arrangement.

Size a soil stack, waste branch and vent pipe using fixture units and developed length, and state the minimum vent diameter rule you applied.

Explain trap seal protection and compare individual, common, wet, circuit and air-admittance venting, naming where each is acceptable.

Calculate drain gradients and invert levels for a branch run, converting between fall in mm per metre and ratio (for example 1 in 48).

Classify traps (P, S, bottle, gully) and explain with a sketch why the S-trap is avoided in modern installations.

Specify the water supply connection and waste connection for a WC, wash basin, kitchen sink and floor trap, giving supply diameter, waste diameter and trap size for each.

Compare electric, gas, solar and heat-pump water heaters on running cost, recovery rate and installation constraints, and select one for a stated household.

Size a storage water heater from daily hot water demand and recovery time, and explain the function of the tempering valve and the temperature-and-pressure relief valve.

Explain backflow prevention and identify where an air gap, check valve or vacuum breaker is required.

Read plan, elevation, section and single-line isometric plumbing drawings, and convert a plan layout into a single-line isometric with correct pipe sizes and symbols.

Take off quantities from a drawing and prepare a bill of quantities with wastage, then prepare rate analysis covering material, labour, overheads and profit.

Prepare an abstract of cost and a quotation for a complete bathroom installation, applying contingency and taxes correctly.

Describe and sequence the hydrostatic test, air test, smoke test, ball test and dye test, stating when each is used and the acceptance criterion.

Diagnose ten common faults, including dripping tap, continuously running cistern, blocked drain, water hammer, low pressure and noisy pipe, and state the most likely cause and remedy for each.

Identify the hazards of a plumbing worksite, including confined spaces, trenches, electrical earthing, working at height and hot-work fire risk, and select the correct control for each.

Select and justify personal protective equipment for threading, soldering, brazing, solvent cementing and drain cleaning tasks.

Write a safe sequence of operations for entering and working in a trench and for working on a roof or ladder, naming the shoring and fall-arrest measures required.

Prepare a preventive maintenance schedule for a household plumbing system covering interval, task, tool and record kept.

Carry out a leak-detection routine on a concealed pipe run and document the method, location found, repair made and retest result.

Apply customer-service practice to a plumbing call-out: confirm the scope, explain the fault in plain language, give a written estimate before starting and issue an invoice with warranty terms.

Outline the steps to set up as an independent plumbing contractor, covering registration, licensing, insurance, record keeping, tool investment and pricing for profit.

Design a rainwater harvesting system for a stated roof area and rainfall, calculating harvestable volume, first-flush diversion, storage size and filter type.

Select water-conserving fixtures and practices, including dual-flush cisterns, aerators, pressure management and greywater reuse, and quantify the litres saved per day against a baseline.

Complete a full timed mock examination across all ten domains and analyse every wrong answer by domain.