单选题What is meant by the term TOPPING THE BOOM?（）ALowering the boomBRaising the boomCSpotting the boom over the deckDSwinging the boom athwartships
单选题
What is meant by the term TOPPING THE BOOM?（）
A
Lowering the boom
B
Raising the boom
C
Spotting the boom over the deck
D
Swinging the boom athwartships
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On a crane, the boom indicator tells the operator what angle the boom angle is compared to the ______.A.vertical positionB.horizontal positionC.boom stop angleD.minimum radius angle
Stress on the topping lift of a swinging boom can be reduced by ______.A.rigging a back stayB.raising the boomC.increasing the mechanical advantage of the cargo purchaseD.taking all slack out of the preventer
A band or collar on the top end of a boom to which the topping lift，midships guy，and outboard guys are secured，is called the ______.A.collar bandB.guy bandC.pad eye collarD.spider band
With a given load on the cargo hook，tension in a single span topping lift ______.A.increases as the boom's angle to the horizontal increasesB.is at a maximum when the boom is at a 45° angle to the horizontalC.increases as the boom's angle to the horizontal decreasesD.decreases as the boom's angle to the horizontal decreases
What does “evel-luffing” accomplish during crane operations ________．A.It prevents the load from swinging when the boom level is adjustedB.Less power is needed when topping the boom with a load on the hookC.It maintains the height of the load above the deckD.All of the above
What is meant by the term“luffing the boom”of a crane ________．A.Stopping the boomB.Topping or lowering the boomC.Moving the boom left or rightD.All of the above
Sudden starts or stops of the boom is likely to cause all of the following except______．A.breaking a cargo runnerB.parting guys topping liftsC.carrying away a blockD.overheating the resistors and eventually burning out
Which part provides for transverse control and positioning of a boom in a conventional yard and stay system ________．A.GuyB.ShroudC.SpiderD.Topping lift
What is meant by the term "firewall sandwich"？（）A、multiple layers of firewallingB、a method of operating firewalls from multiple vendorsC、firewall connections in either an active or standby stateD、an architecture in which all traffic between firewalls goes through application-specific serversE、an architecture in which all traffic between firewalls goes through application-specific gateways
单选题Stress on the topping lift of a swinging boom can be reduced by（）.Arigging a back stayBraising the boomCincreasing the mechanical advantage of the cargo purchaseDtaking all slack out of the preventer
单选题What is meant by the term“luffing the boom”of a crane（）．AStopping the boomBTopping or lowering the boomCMoving the boom left or rightDAll of the above
单选题A band or collar on the top end of a boom which the topping lift, midships guy, and outboard guys are secured, is called the（）.Acollar bandBguy bandCpad eye collarDspider band
单选题What is meant by the term “broaching to”? （）AHaving the vessel head toward the seaBRunning before a seaCBeing turned broadside to the seaDHaving the vessel filled with water
单选题What is meant by the term two-blocked（）.AThe bottom block touches the top blockBThe line has jumped the sheavesCThere are turns in the fallDYou have two blocks
单选题What is meant by the term overhaul in firefighting?（）ASlow down the spread of fire by cooling adjacent structuresBCover the fire with foamCSmother the fire with a blanket or similar objectDBreak up solid objects to ensure that any deep seated fires are extinguished
单选题A tackle by which the outer end of a boom is raised and lowered is the topping（）.AboomBliftCraiseDtackle
单选题The tackle that raises and lowers the boom is（）.Athe cargo fallBThe cargo hoisting wire ropeCthe topping liftDthe cargo whip
单选题It’s a configuration that experts are calling a "firewall sandwich，" with the second firewall providinga second level of load balancing after traffic down. What is meant by the term "firewall sandwich"？（）A single layer of firewallingB multiple layers of firewallingC firewall connections in either an active or standby stateD an architecture in which all traffic between firewalls goes through application-specific servers
单选题The boom indicator tells the operator at what angle the boom is compared to the（）.Ahorizontal position of the boomBvertical position of the boomChorizontal position of the load being liftedDvertical position of the load being lifted
单选题Sudden starts or stops of the boom is likely to cause all of the following except（）.Abreaking a cargo runnerBparting guys topping liftsCcarrying away a blockDoverheating the resistors and eventually burning out
单选题With a given load on the cargo hook，tension in a single span topping lift（）.Aincreases as the boom's angle to the horizontal increasesBis at a maximum when the boom is at a 45° angle to the horizontalCincreases as the boom's angle to the horizontal decreasesDdecreases as the boom's angle to the horizontal decreases
单选题What is meant by the term "firewall sandwich"？（）Amultiple layers of firewallingBa method of operating firewalls from multiple vendorsCfirewall connections in either an active or standby stateDan architecture in which all traffic between firewalls goes through application-specific serversEan architecture in which all traffic between firewalls goes through application-specific gateways
单选题What is meant by spotting the boom?（）ALowering it into a cradleBPlacing it in a desired positionCSpotting it with wash primer and red leadDTwo-blocking it
单选题What does “evel-luffing” accomplish during crane operations（）.AIt prevents the load from swinging when the boom level is adjustedBLess power is needed when topping the boom with a load on the hookCIt maintains the height of the load above the deckDAll of the above
单选题0n a crane ,the boom indicator tells the operator what angle the boom angle is compared to the（）.Avertical positionBhorizontal positionCboom stop angleDminimum radius angle