BLASTING & PAINTING QUESTION ANSWER
Q.1. )
there are 6 types of surface preparation grade in blasting -T/F
F
Primer is the actual corrosion inhibitor in the paint system T/F
T
Magnetic temperature gauge used to measure the blasting pressure T/F
F
blasting pressure should measure without abrasive material in the blasting
hose T/F
F
hypodermic needle gauge used to measure the surface roughness T/F
F
Hypodermic needle gauge should insert opposite to the air flow T/F
hypodermic needle gauge should insert at 31 degree to air flow pipe T/F
F
smaller the garnet mesh size higher the roughness property T/F
F
St 3 is a hand tool surface preparation grade by manually T/F
F
VS % stands for velocity of sound T/F
F
pigment is related word about garnet type T/F
F
purpose of intermediate coat to provide natural drainage to the paint system T/F
F
SA-3 is a 3rd type of surface preparation grade by abrasive material T/F
F
For black colour paint we use titanium dioxide pigment T/F
F
There are 5 atmospheric environment condition in the corrosion system T/F
F
steel is unstable structure in the environment T/F
T
low durability period require less DFT paint T/F
T
CM5 atmospheric corrosivity is a urban & industrial environment T/F
F
blast nozzle control by Deadman's handle T/F
painting tip fan width measure at a distance of 10 inch from substrate T/F
blasting nozzle NO 5 is require more air pressure than NO 6 T/F
F