更多"A bright shiny appearance of the se"的相关试题:
[单项选择]Black areas on the sealing surfaces of piston rings indicate（）
A. lube oil pumping
B. rotating rings
C. gas pressure behind the ring
D. passage of hot gases
[单项选择]Grease coatings on electrical contact surfaces increase contact resistance and should be removed with a/an （）.
A. small wire brush
B. compressed air jet
C. clean dry cloth
D. 10% solution carbon solvent and water
[单项选择]The bearing of tailshaft sealing equipment, which adopting the oil nature circulation is hot, the reason is（）
A. the rotate speed fluctuation
B. the ventilation tube clogged
C. the main engine accelerate so fast
D. stormy waves
[单项选择]The tailshaft sealing arrangement found a little lube oil leaky and caused a lot of seawater into the bearing, the step should be taken as a makeshift is（）
A. dropping lube oil for lubrication, reducing the pollution to the sea
B. setting a temporary gravity oil tank and enhanced the position properly
C. lubricating with the used lube oil
D. lubricating with the fresh water and navigation in a lower speed
[单项选择]Setting a sealing equipment astern on the tailshaft can’t （）
A. prevent the seawater from intergrating
B. prevent the lube oil from running out of the outside aboard
C. strengthen the intencity of the sterntube
D. prevent the mud and sand from entering the lube oil system
[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]Fins are installed on the generating tube surfaces in waste heat boilers to （）.
A. prevent soot fires in the exhaust system
B. prevent exhaust gas erosion of the tubes
C. increase the velocity of exhaust gas flow
D. increase the rate of heat transfer
[单项选择]Scuffed cylinder liner surfaces in a diesel engine can result form（）
A. starting the engine hot
B. knurling the piston skirt
C. operating an overheated engine
D. using scuff resistant piston rings
[单项选择]Scuffed cylinder liner wearing surfaces in a diesel engines can result from （）
A. chromium plating piston rings
B. knurling the piston skirt
C. extended maximum power operation
D. applying load to a cold diesel engine
[单项选择]The horizontal flat surfaces where the upper stock joins the rudder are the（）.
A. rudder keys
B. rudder palms
C. lifting flanges
D. shoes of the rudder
[单项选择]Reducing free surfaces has the effect of lowering the（）.
A. uncorrected KG
B. virtual height of the center of gravity
C. metacenter
D. metacentric height
[单项选择]Some pumps use packing as sealing glandThe gland should be （）.
A. slack enough to allow slight leakage of fluid
B. slightly clocked
C. brought up tight so as not to allow any leakage
D. fitted with a relief valve
[单项选择]Shaft sealing in a centrifugal pump can be effected by （）.
A. the mechanical seal
B. packed stuffing boxes
C. either A or B
D. neither A nor B
[单项选择]The sealing function of the piston ring is brought about by the gas pressure above and behind the piston ring, which forces it （） against the bottom of the ring groove, and （） against the cylinder wall.
A. upwards；inwards
B. upwards；outwards
C. downwards；inwards
D. downwards；outwards
[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]Additives （） protective layers on metal surfaces guarding them against corrosion.
A. damage
B. form
C. dissolve
D. contaminate
[单项选择]在Surfaces中旋转命令是哪个（）
A. Revolve
B. loft
C. planar
D. Extrude
