(b) permitted (c) not enough information (d) not addressed by the code REF : API 653 – 7.13.4 & Fig. This area shall be :(a) Repaired or replaced (b) Found to be acceptable (c) Repair is prohibited (d) Replacement is mandated REF : API-653, 2.2.1.2 ANS : (b) 3) A formal Visual External inspection by a qualified inspector shall be done atleast :(a) Every 5 years of ¼ CR life whichever is less (b) Every 5 years of ½ CR life whichever is less (c) Every 2 years (d) Every 1- years or ¼ CR life whichever is greater REF : 653 4.3.2.1 ANS : (a) 4) A full hydrostatic test (when required) shall be held for _ hours :a) 24 (b) 8 (c) 18 (d) 12 REF : 653 10.3.1.1 ANS : (a)ĥ) A hot tap in a 1.25" thick tank with a minimum metal temperature of 65oF at time of hot tap, without having material toughness data is :(a) not permitted API 653 1) _ is a change from previous operating conditions involving different properties of the stored product such as specific gravity or corrosivity and / or different service conditions of temperature and / or pressure" (a) Re-rating (b) Change in service (c) Repair (d) Reconstruction REF : API-653, - 1.5.4 ANS : (b) 2) A corroded roof plate is found to have an average thickness of 0.1" measured over an area of 100 sq.
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