更多"Reducing free surfaces has the effe"的相关试题:
[单项选择]Reducing the liquid free surfaces in a vessel reduces the（）.
A. roll period
B. metacentric height
C. waterplane area
D. vessel's draft
[单项选择]Increasing free surfaces has the effect of raising the（）.
A. uncorrected KG
B. virtual height of the center of gravity
C. metacenter
D. metacentric height
[单项选择]The effect of free surface on initial stability depends upon（）.
A. the amount of liquid in the compartment
B. the dimensions of the liquid surface and the vessel's displacement
C. only the length of the compartment
D. the vertical position of the liquid in the vessel
[单项选择]Free communication effect is in direct proportion to（）.
A. length and width of space
B. length of space only
C. width of space only
D. neither length nor width
[单项选择]A heated bulkhead has the effect on a hygroscopic commodity of（）.
A. causing moisture to accumulate against the bulkhead
B. lowering the vapor pressure of the commodity
C. lowering the dew point of the air
D. raising the vapor pressure of the commodity
[单项选择]Which factor has the greatest effect on the amount of gain required to obtain a fathometer reading?（）
A. Salinity of water
B. Temperature of water
C. Atmospheric pressure
D. Type of bottom
[单项选择]A trade custom has been proved to the effect that in trade between Sarawak and Singapore mate’s receipts（）universally adopted as documents of title as in same way as bills of lading.
A. are
B. takes
C. makes
D. has
[单项选择]Spreading oil on the open sea has the effect of（）.
A. diminishing the height of the seas
B. lengthening the distance between successive crests
C. increasing the height of the seas
D. preventing the wave crests from breaking
[单项选择]The signal given to commence lowering the lifeboats is（）.
A. 3 short blasts of the ship's whistle
B. 1 short blast of the ship's whistle
C. 3 long blasts of the ship's whistle
D. 1 long blast of the ship's whistle
[单项选择]When lowering manropes alongside a stage rigged over the side of a vessel，they should be allowed to trail in the water（）.
A. to easily remove the kinks that form in the lines
B. to allow the seamen on the stage to know the direction and strength of the current
C. to provide the seaman something to hold onto if he or she falls from the stage into the water
D. only for short periods of time since they will become waterlogged and be very heavy to pull up
[单项选择]Prior to lowering the lifeboat，the most important item to check is the（）.
A. oars
B. sail
C. boat plug
D. life preservers
[单项选择]The most common cause of lowering the crankcase lube oil flash point is （）.
A. more water contents
B. contamination with fuel oil
C. higher temperature
D. sufficient cooling of oil mist
[单项选择]When lowering lifeboats in heavy seas，a good practice is to rig frapping lines（）.
A. on only the forward falls
B. on only the after falls
C. with a lead of about 45 degrees to the boat
D. from the falls to the main deck of the vessel
[单项选择]A lifeboat is weight tested by lowering to near the waterand loading to capacity with weight evenly distributed. Itis then lowered into the water and released. This test mustbe done at least once every（）.
A. 6 months
B. 12 months
C. 18 months
D. 24 months
[单项选择]In ship operations，hoisting and lowering pipe in and out of the drilled hole is the main function of the（）.
A. swivel
B. cathead spool
C. drawworks
D. stand pipe
[单项选择]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
