Section 36(1)(a) in Punjab Boiler Operation Engineers' Rules, 2001
(a)heat transfer as applicable to Boiler Technology, three modes of heat transfer, conductance and resistances, steady and unsteady state of heat transfer, combination of heat transfer mechanism, heat transfer surface arrangements, parallel flow, counter flow and cross flow, effect of lanes, tube spacing, tube diameters, affect of oil or scale, insulation and heat loss;