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Fuels Vol. 2 Unit 4
Loading/Offloading Facilities, Bonding and Grounding, and Pipelines
| Question | Answer |
|---|---|
| what type of couplings are provided at truck offloading facilities? (230) | API 1004 and camlock adapters for commercial trucks, and single point receptacles for military refueling trucks |
| tank truck unloading headers will be spaced about how many feet apart? (230) | 40 feet |
| emergency stop switches have what type of contacts and complete which circuits? (231) | closed contacts; low-voltage for the fuel transfer pump control |
| what type of grounding rods are used on aboveground fuel tanks? (232) | galvanized steel |
| where are the emergency-stop switches located? (231) | at truck and tank car loading installations. must not be closer than 25 ft |
| are emergency-stop switches normally open or closed? (231) | closed |
| what must be reset when an emergency-stop switch is pushed? (231) | circuit breaker |
| what color are emergency-stop switches? (231) | red |
| when the pump select switch is turned to AUTO, what switch must be used to operate the pump? (231) | remote pump switch |
| how is the piping at a truck loading and offloading headers connected and grounded? (232) | by means of a 3/32-inch, nylon-covered, stainless steel wire rope ground cable; an approved ground rod |
| why is copper not used in a grounding system? (232) | copper causes corrosion when reacting w/ steel |
| usually, what is the cause of corrosion in underground pipelines and tanks? (233) | either galvanic corrosion or stray-current corrosion |
| an impressed-current cathodic protection system uses anodes made of (233) | carbon |
| what do unaccountable fluctuations of the rectifier in a cathodic protection system indicate? (233) | stray-current activity |
| when receiving fuel by pipeline, what is the first component that fuel passes through at the bulk storage area? (234) | pressure-reducing valve |
| what is the minimum speed for a scraper when cleaning a pipeline? (234) | 2 mph |
| how is the number of pump stations to be used on a pipeline determined? (234) | by the distance and terrain features |
| temporary pipeline is constructed using what type of pipe? (234) | Victaulic pipe |
| how are permanent repairs made to corrosion leaks on aboverground tanks? (234) | by welding |
| what is used to pressurize a pipeline during the annual pressure test? (234) | installed pumps |
| how often is a hydrostatic pressure test required? (234) | every 5 years |
| at what percent of the normal operating pressure is the hydrostatic pressure test performed? (234) | 150% |
| what type of test must be performed if leak or excessive pressure drop is indicated during the hydrostatic pressure test? (234) | flow test |
| what would indicate the need for pipeline cleaning? (234) | a drop in flow rate and pressure |
| why is it important not to shut down the fuel flow while a scraper is moving through the line? (234) | dirt and debris settling in front of the scraper will cause it to be stuck |
Created by:
Scottydick
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