Most pedestal crane power is provided by ______．A.Electro-hydraulic unitsB.Steam unitsC.Independent internal combustion power unitsD.All of the above
Most pedestal crane power is provided by ______．
A.Electro-hydraulic units
B.Steam units
C.Independent internal combustion power units
D.All of the above
相关考题：
Pedestal cranes have limit switches to restrict the movement of which function?______.A.Luff rate limitsB.Slew travel limitsC.Swivel power limitsD.Slew rate limits
Which of the following can occur if the maximum rated load is exceeded on an uninterruptible power supply (UPS)?() A. There is a fire hazard potential if a power outage occurs.B. The last system plugged into the UPS will not be provided any power.C. The UPS will draw more power from the circuit to compensate.D. The runtime of the UPS will be insufficient if a power outage occurs.
The boom stops on a pedestal crane prevent the boom from ______.A.being raised too highB.swinging at seaC.overloading when not in useD.being lowered too low
For any given pedestal crane，when the boom is lengthened，the lifting capacity is ______．A.unchangedB.increasedC.eliminatedD.decreased
Which of the following statement（s）is/are FALSE regarding a twin pedestal crane set ________．A.The cranes may be operated independentlyB.The cranes may be interconnected for twin operationC.The cranes are powered by independent internal combustion power unitsD.All of the above
Which of the following statement（s）is/are TRUE regarding a twin pedestal crane set ________．A.The cranes may be operated independentlyB.The cranes may be interconnected for twin operationC.When twinned，the crane rotation on the foundation assembly is unlimitedD.All of the above
Which statement is FALSE concerning a tagline as used with a 30-ton pedestal crane ________．A.Taglines are wire rope purchases that raise and lower the jibB.Taglines are wire ropes for horizontal positioning of the rider blockC.Taglines can be fastened to corners of vehicles or containersD.The crane might not have taglines installed in its rigging system
Which wire rope purchases may be used with a 30-ton pedestal crane ________．A.HoistB.LuffC.Rider blockD.All of the above
During which condition should the operator of a pedestal crane shutdown operations ________．A.Bunkering barge alongsideB.Potable water spill on deckC.Crane hydraulic hose burstsD.Trim greater than 4 feet
During which condition should be operator of a pedestal crane shutdown operations?A.BunkeringB.High windsC.Potable water spill on deckD.More than 3°list
Which of the following is the MOST likely to cause a server power supply fan to fail but allows the power supply to still be functional？（）A、DustB、Power SurgeC、Excessive humidityD、High temperatures
Which of the following can occur if the maximum rated load is exceeded on an uninterruptible power supply （UPS）？（）A、 There is a fire hazard potential if a power outage occurs.B、 The last system plugged into the UPS will not be provided any power.C、 The UPS will draw more power from the circuit to compensate.D、 The runtime of the UPS will be insufficient if a power outage occurs.
单选题Which statement is FALSE concerning a tagline as used with a 30-ton pedestal crane（）.ATaglines are wire rope purchases that raise and lower the jibBTaglines are wire ropes for horizontal positioning of the rider blockCTaglines can be fastened to corners of vehicles or containersDThe crane might not have taglines installed in its rigging system
单选题What is the purpose of the equalizing beam aboard a crane vessel（）.AIt allows for rotation of the hook in the single modeBIt is required to“twin-up”30-ton pedestal cranesCIt is used to pick up light loadsDIt is used to rigidly connect two cranes
单选题Which of the following statement（s）is/are TRUE regarding a twin pedestal crane set（）.AThe cranes may be operated independentlyBThe cranes may be interconnected for twin operationCWhen twinned，the crane rotation on the foundation assembly is unlimitedDAll of the above
单选题For any given pedestal crane,when the boom is lengthened, the lifing capacity is（）.AunchangedBincreasedCeliminatedDdecreased
单选题The boom stops on a pedestal crane prevent the boom from（）.Abeing raised too highBswinging at seaCoverloading when not in useDbeing lowered too low
单选题During which condition should the operator of a pedestal crane shutdown operations?（）ALightningBHigh windsCFire aboardDAll of the above
单选题The crane is usually mounted on a pedestal to offer adequate （） to the operator.AtimeBspaceClengthDvisibility
单选题During which condition should the operator of a pedestal crane shutdown operations?（）ABunkeringBHigh windsCPotable water spill on deck
单选题Which of the following statement（s）is/are FALSE regarding a twin pedestal crane set （）.AThe cranes may be operated independentlyBThe cranes may be interconnected for twin operationCThe cranes are powered by independent internal combustion power unitsDAll of the above
单选题Which action(s) should the operator of a pedestal crane take if crane control is lost?（）ALet go of both control levers and return to neutral positionBPress the emergency stopCNotify the mate on watchDAll of the above
单选题Most pedestal crane power is provided by（）.AElectro-hydraulic unitsBSteam unitsCIndependent internal combustion power unitsDAll of the above
单选题During which condition should the operator of a pedestal crane shutdown operations?（）ABunkering barge alongsideBPotable water spill on deckCCrane hydraulic hose burstsDTrim greater than 4 feet
单选题The center of gravity of a freely swinging load suspended from a pedestal crane acts as if it were located at the（）.AcounterweightBpedestalClongitudinal centerlineDpoint of suspension
单选题Which of the following can occur if the maximum rated load is exceeded on an uninterruptible power supply (UPS)?（）AThere is a fire hazard potential if a power outage occurs.BThe last system plugged into the UPS will not be provided any power.CThe UPS will draw more power from the circuit to compensate.DThe runtime of the UPS will be insufficient if a power outage occurs.