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Showing posts from December, 2018

TENSILE STRENGTH

TENSILE STRENGTH It is the resistance of the material to breaking under tension . TENSION An  apply force to an object which tends to stretch it . FORCE A force is an interaction in a body which causes the puss and pull to the body in an certain direction. according to Newton second law of motion "Rate of change of momentum is directly propertional to the force applied on the body ." Mathematically formulated as F=ma  

BOILER WATER TEST

BOILER WATER TEST  PURPOSE OF BOILER WATER TEST  To maintain  boiler is in good condition and prevent it from any damages due to acidic corrosion , scale formation etc. To control the chemical feed to the boiler i.e the quantity of chemicals to be added . WHAT ARE ALL THE TEST TO BE CARRIED OUT  1. Alkalinity Test 2. Chloride Test 3. Phosphate Test 4. pH test 5. Conductive test How sampling is done and which is the sampling point ? Sampling should be done from the same point where it was taken previous . In general consideration, sampling point is SALINOMETER cock . Always ensure that air should not be trapped inside the sampling bottle because it will affect the tets result , to do this overflow the bottle . WHAT IS ALKALINITY TEST ? AND HOW IT IS CALCULATED ?  Alkalinity test is carried out to find out the presence and quantity of calcium carbonates in boiler feed water . There are two tests which  we carried out for alkalinity. 1. P...