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单选题
The process of lowering a boom to a horizontal position and onto its deck support is called（）.
A
spotting a boom
B
collaring a boom
C
cradling a boom
D
toppling a boom
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更多 “单选题The process of lowering a boom to a horizontal position and onto its deck support is called（）.A spotting a boomB collaring a boomC cradling a boomD toppling a boom” 相关考题
考题
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
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The boom stops are installed on an offshore crane to ______.A.prevent the boom from being raised too highB.prevent the boom from swingingC.support the boom when not in useD.prevent the boom from being lowered
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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
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With a given load on the cargo hook，the thrust on a cargo boom ______.A.increases as the angle to the horizontal increasesB.increases as the angle to the horizontal decreasesC.is greatest at an angle of 45° and decreases as the boom is raised or loweredD.is least at an angle of 45° and increases as the boom is raised or lowered
考题
How should you signal the crane operator to lower the boom and raise the load ________．A.Extend arm and point finger in the direction to move the boomB.Extend arm with thumb pointing downward and flex fingers in and outC.With forearm vertical and forefinger pointing up，move hand in small horizontal circlesD.With arm extended downwards and forefinger pointing down，move hand in small horizontal circles
考题
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
考题
While cranking out a quadrantal davit，slippage of the quadrant due to excessive wear or failure of the teeth in the quadrant will cause the ______．A.Davit arm to pivot on the traveling nut and the head to fall outboardB.Traveling nut to lock up in place on the worm gearC.Limit switch to engage and hold the traveling nut in positionD.Winch brake to lock in position and prevent lowering the boat
考题
______is the process by which the position of the vessel at any moment is found by applying the last well-determined position to the run that has been made since, using for this purpose the ship’s course and the distance being those indicated by log.A.dead reckoningB.dead weightC.dead slow aheadD.dead slow astern
考题
How should you signal the crane operator to lower the boom?______.A.With arm extended and fingers closed, point thumb downwardB.With arm extended downwards and forefinger pointing down, move hand in small horizontal circlesC.Extend arm with the palm down, and hold this position rigidlyD.With hands clasped in front of your body
考题
How should you signal the crane operator to raise the boom?_________.A.Extend arm with the thumb pointing up and flex the fingers in and outB.Place both fists in front of the body with the thumbs pointing upwardC.With forearm vertical and forefinger pointing up，move hand in small horizontal circlesD.Extend arm with fingers closed and point thumb upward
考题
单选题What is meant by the term TOPPING THE BOOM?（）A
Lowering the boomB
Raising the boomC
Spotting the boom over the deckD
Swinging the boom athwartships
考题
单选题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
考题
单选题How should you signal the crane operator to lower the boom and raise the load（）.A
Extend arm and point finger in the direction to move the boomB
Extend arm with thumb pointing downward and flex fingers in and outC
With forearm vertical and forefinger pointing up，move hand in small horizontal circlesD
With arm extended downwards and forefinger pointing down，move hand in small horizontal circles
考题
单选题The boom stops are installed on an offshore crane to（）.A
prevent the boom from being raised too highB
prevent the boom from swingingC
support the boom when not in useD
prevent the boom from being lowered
考题
单选题Which of the following statements is true concerning centrifugal pumps?（）A
They are particularly suited for pumping high viscosity fluidsB
They are started with the discharge valve openedC
The flow of liquid is developed by imparting energy due to the rotation of an impellerD
They are always mounted in a horizontal position
考题
单选题How should you signal the crane operator to lower the boom and raise the load?（）.A
Extend arm and point finger in the direction to move the boomB
Extend arm with the thumb pointing downward and flex fingers in and outC
With f rearm vertical and forefinger pointing up,move hand in small horizond circlesD
With arm extended downwards and forefinger pointing down,move hand in small horizontal circles
考题
单选题When using horizontal sextant angles of three objects to fix your position，an indeterminate position will result in which situation（）.A
The objects lie in a straight lineB
The vessel is inside of a triangle formed by the objectsC
The vessel is outside of a triangle formed by the objectsD
A circle will pass through your position and the three objects
考题
单选题While cranking out a quadrantal davit，slippage of the quadrant due to excessive wear or failure of the teeth in the quadrant will cause the（）.A
Davit arm to pivot on the traveling nut and the head to fall outboardB
Traveling nut to lock up in place on the worm gearC
Limit switch to engage and hold the traveling nut in positionD
Winch brake to lock in position and prevent lowering the boat
考题
单选题How should you signal the crane operator to raise the boom and lower the load?（）.A
Extend arm with the palm down and and hold this position rigidlyB
Place both fists in front of the body with the thumbs pointing outward each otherC
Clasp hands in front of you bodyD
Extend arm with the thumb pointing up, and flex the finger s in and out for as long as the load movement is desired
考题
单选题The boom indicator tells the operator at what angle the boom is compared to the（）.A
horizontal position of the boomB
vertical position of the boomC
horizontal position of the load being liftedD
vertical position of the load being lifted
考题
单选题With a given load on the cargo hook，the thrust on a cargo boom（）.A
increases as the angle to the horizontal increasesB
increases as the angle to the horizontal decreasesC
is greatest at an angle of 45° and decreases as the boom is raised or loweredD
is least at an angle of 45° and increases as the boom is raised or lowered
考题
单选题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
考题
单选题（）is the process by which the position of the vessel at any moment is found by applying the last well-determined position to the run that has been made since，using for this purpose the ship’s course and the distance being those indicated by log.A
dead reckoningB
dead weightC
dead slow aheadD
dead slow astern
考题
单选题（）process the distress signal from EPIRB to determine its position and identity.A
COSPAS-SARSATB
ground receiving stationsC
storing distress signalD
Near polar orbiting satellites
考题
单选题When viewed from above，the best position for the guy in relation to the boom is（）.A
At a 45° angleB
At right anglesC
4 feet aft of the heel of the boomD
Parallel to the boom
考题
单选题For COAPAS-SARSAT system,（）process the distress signal from EPIRB to determine its position and identity.A
COSPAS-SARSATB
ground receiving stationsC
spacecraftD
satellite SAR instrument
考题
单选题The pivot pin at the base of a sheath-screw boom davit must be（）.A
inserted each time before the booms are cranked outB
periodically removed for inspection and lubricatedC
replaced at each inspection for certificationD
in the locked position after the boat is cradled and griped down
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