更多"Grease coatings on electrical conta"的相关试题:
[单项选择]Dirt should not be allowed to contaminate a grease lubricant because the （）.
A. dirt will cause corrosion of bearing
B. bearings will leak oil excessively
C. dirt is very abrasive when mixed with grease
D. grease will become inflammable
[单项选择]A bright shiny appearance of the sealing surfaces on diesel engine compression rings indicates（）
A. combustion gas blow-by
B. excessive lubrication
C. properly functioning rings
D. insufficient cylinder cooling
[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]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
[单项选择]A grease gun is generally used to lubricate a （）.
A. condensate pump ball bearing
B. main shaft bearing
C. main turbine bearing
D. diesel engine wrist pin bearing
[单项选择]Any carbon built up on surfaces must be washed away by （） additives and held in suspension by a （） additive.
A. dispersant；detergent
B. detergent；dispersant
C. dispersant；dispersant
D. detergent；detergent
[单项选择]The lube oil to lubricate the surfaces of the cylinder liners is spread over by the （）.
A. sliding piston rings
B. engines camshaft
C. small pumps
D. forced feed system
[单项选择]In the presence of an open flame or hot surfaces, chlorinated fluorocarbon refrigerants decomposes and from （）
A. petroleum crystals
B. phosgene gas
C. water vapor
D. carbon monoxide
[单项选择]Grease the roller bearings with HPgun In the sentence “HP” means （）.
A. horse power
B. high pressure compressor
C. hand pump
D. high pressure
[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]A galley grease fire on the stove may be extinguished using（）.
A. water
B. foam
C. the range hood extinguishing system
D. fire dampers
