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cco site considerati
cco site considerations
| Question | Answer |
|---|---|
| What should be of major concern when considering the supporting surfaces for crane set-up locations? | voids, tanks, loose fills, depressions |
| What effect does span blocking have on outrigger floats/pads? | decreases strength |
| If working near power lines and using a tagline, which type of rope is least conductive to electricity? | polypropylene |
| When working on a site with nearby power lines you must: | -avoid stockpile material under power lines -maintain the correct distance according to the rated K.V. -avoid lifting loads over power lines |
| According to OSHA 1926. 1411, while traveling a crane under power lines, if any part of the equipment will get closer then 20 feet to the lines you must: | use a dedicated spotter |
| Which is the most common cause of injuries to the crane operators? | falls from the crane getting on and off |
| What is the preferred type of outrigger pad support? | hardwood timber mats |
| According to OSHA 1926. 1409 for power lines rated over 350 kv up to 1000 kv, but the exact voltage is not known, what is the minimum clearance between the lines an any part of the crane or load? | 50ft |
| If an operator is working in a new construction area, confirmation of the ground conditions and it's ability to support anticipated loads should be confirmed by what means? | site supervisor of controlling entity |
| According to ASME B30.5,when working a crane near power lines of 50kv or less, no part of the crane may come within what distance of the lines? | ten feet |
| Blocking (cribbing) placed under outrigger beams: | reduces the lifting base of the crane |
| Why use mats or cribbing? | to reduce ground pressure |
| What must the operator do if there is reason to believe the lift may be dangerous or unsafe? | refuse to lift the load until safety has been assured |
| Load chart ratings apply only when the ground conditions are firm enough to support and keep the crane: | level throughout the lift |
| which is the proper way to get on and off the crane? | face the machine when climbing on o off, using 3-point contact |
| If you set a crane up on a warm afternoon with the tires just touching the ground and overnight the temperature drops down below 30 degrees, what would be the position of the tires in the morning? | be 2" above the ground |
| When entering a sit for he first time, what is the biggest concern? | Compaction of access roadway |
| According to ANSI B30.5, a accessible fire extinguisher shall be available at all operator stations or cabs of equipment and shall have a minimum rating of what? | 10 BC |
| When operating a crane near power lines of known voltage between 50kv and 200kv how much clearance is required? | 15 feet |
| What is not a good location for crane setup? | above utilities |
| In the event of electrical contact, the operator should do what? | reverse action that caused contact |
| According to OSHA 1926. 1404; I assembly/disassembly is being performed by only one person, that person must meet the criteria for: | Both competent person and qualified person |
| In the event of electrical contact in which the operator has to leave the crane how should he leave? | Jump clear of the crane and hop away |
| Which of the following allows a part of the boom or the load to operate closer to power lines than the minimum required clearance? | if transmission lines are de-energized and grounded |
| What is the minimum distance that must remain between any part of the crane and power lines when traveling under lines of know voltage over .75kv to 50kv? | 6 feet |
| What is the OSHA regulation which governs cranes in general industry? | 1910.180 |
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