A． water jacket is placed around the exhaust manifolds of propulsion diesel enginesto( ).

A．reduce heat radiation to the engine room

B．aid in preventing turbocharger overheating

C．condense and drain moisture from exhaust gases

D．dampen exhaust gas pulsations in the manifold

[单选题]The jacket water temperature in a diesel engine closed freshwater cooling system is normally controlled by （）A . regulating the level of corrosion inhibitor in the primary cooling systemB . the level of the freshwater expansion tankC . varying the en

[单选题]The cooling water jacket is common to all the cylinders but there are often （） to ensure that each cylinder receives the right amount and flow of water.A . dividing wallsB . divided wallsC . dividing linersD . divided jacket

[单选题]If the jacket water temperature rises rapidly above normal in a diesel engine, you should firstA．place standby cooler in operationB．reduce engine loadC．check thermostatic valveD．clean sea water strainer

[单选题]Diesel engine jacket water is used in the distillation process as the （）.A . coolant for the distillateB . coolant for the brine coolerC . means of heating the feedwaterD . primary means of producing a vacuum within the distiller

[试题]Becauseofthe_____emphasisplacedonclassroomwork,theinstructorwillreportyourabsencestotheadviser.(A)large(B)strong(C)hard(D)high

[试题]emphasis placed 选择B．ecauseofthe_____onclassroomwork,theinstructorwillreportyourabsencestotheadviser.(A)large(B)strong(C)hard(D)high

[单选题]A． ______ system placed between the company network and the outs2012q2/cte world may limit outs2012q2/cte access to the internal network.A．firewallB．modemC．gatewayD．KeyA．B．C．D．

[单选题] A (75) system placed between the company network and the outside world may limit outside access to the internal network.(75)A． firewallB． modemC． gatewayD． key

[单选题]Where must the draft marks be placed on a small passenger vessel? （）A . On each side of the stemB . Near the stern post or rudder postC . At each end of the vesselD . All of the above

[单选题]What is placed on the under side of an inflatable liferaft to help prevent it from being skidded by the wind or overturned?（）A . Water pocketsB . A keelC . StrikesD . Sea anchor