LP Gas Master Qualifier: Gas Leak Detection & Corrosion Control Exam (Questions and Answers)

Customer leak calls must be responded to within _______ hours. A. 12 B. 24 C. 72 D. 48 - Answer-B. 24 Customer leak calls must be responded to within ________ hours when emergency personnel are involved. A. 2 B. 4 C. 8 D. 1 - Answer-A. 2 Bar probe testing of underground LP-Gas systems is required every ________years. A. 1 B. 2 C. 3 D. 5 - Answer-D. 5 Inspection, Testing and Purging of gas systems can be found in Chapter ________ of ________. A. 6 of NFPA 58 B. 4 of NFPA 54 C. 5J20.045 of FAC D. 8 of NFPA 54 - Answer-D. 8 of NFPA 54Underground LP-Gas systems shall be tested utilizing a ___________or equivalent. A. Test block B. Concentrated soap suds solution C. Combustible gas indicator D. Combustion analyzer - Answer-C. Combustible gas indicator Underground metallic piping shall be provided with _________ to electrically isolate it from the piping that enters a building. A. A vapor meter B. Dielectric fittings C. Tracer wire D. Emergency shutoff valves - Answer-B. Dielectric fittings Corrosion protection of underground steel containers shall include the following: A. Coating B. Cathodic protection C. Means of testing D. All of the above - Answer-D. All of the above An acceptable level of cathodic protection is achieved by producing a voltage of _______ with reference to a copper-copper sulfate half-cell. A. +100 millivolts B. -14 volts C. -.30 volts D. -.85 volts - Answer-D. -.85 volts A cathodic protection system must be retested within _________ after the initial test.A. 12-18 months B. 7-10 business days C. 24 months D. 48 hours - Answer-A. 12-18 months