更多"Typical marine propulsion plants in"的相关试题:
[单项选择]Most marine biological sewage treatment plants consist of all the following statements except （）.
A. aeration tanks
B. settling tanks
C. disinfection agent
D. anaerobic bacteria
[单项选择]This arrangement is （） if the elements are directly connected to one another and the control action takes place without human involvement.
A. a manual closed loop
B. a manual opened loop
C. an automatic closed loop
D. an automatic opened loop
[单项选择]In a diesel engine, offers the heat energy directly（）； works as working medium and changes the heat energy to mechanical energy（）
A. the burning of the fuel； medium shaft
B. fuel spray； fresh air
C. fuel； fuel spray
D. the burning of the fuel； the burned gas mixture
[单项选择]Large marine diesel engines of crosshead construction generally have two systems of lubrication: a total loss system feeding the （） and a recirculation system lubricating the running gear and cooling the piston.
A. cylinder liners and piston rings
B. main bearings
C. crankpin bearings
D. turboblower
[单项选择]Turbocharging of marine diesel engine is achieved by two distinct methods, （） termed the constant pressure and the pulse system.
A. respectable
B. respectful
C. respective
D. respectively
[单项选择]These plants are rather difficult（）
A. to look after
B. to be looked after
C. being looked after
D. looking after
[单项选择]Which of the following marine examples belongs to the open loop control system?（）
A. Accommodation heating system
B. Steering gear
C. Boiler control
D. Cargo control
[单项选择]Which of the following marine insurance policies is normally purchased by the cargo owner?（）.
A. Hull
B. Cargo
C. Protection and Indemnity
D. Pollution
[单项选择]A marine chemist issues gas free certificates and is certified by which organization? （）
A. Mine Safety Appliance Association
B. American Chemical Society
C. Marine Chemists Association
D. National Fire Protection Association
[单项选择]As defined in the regulations governing marine casualties a “marine employer” may be the（）.
A. owner
B. agent
C. Master
D. All of the above
[单项选择]One method of constructing large marine diesel engines and reducing the total engine frame weight is through （）.
A. casting interlocking components
B. welding plates to form sections for assembly
C. forging integral components
D. case hardening integral components
[单项选择]In large marine diesel engines cylinder oils usually contain additives formulated to impart the （） to clean the rings and grooves.
A. inefficiency
B. oiliness
C. detergency
D. purity
[单项选择]Cylinders of marine diesel engines are normally cooled by （）.
A. sea water
B. fine mineral oil
C. sanitary water
D. fresh water
[单项选择]MArine line涂层的特点是（）
A. 能抵御所有已知溶剂和98%的海运散装化学品，亦具有良好的物理性能
B. 酸、碱溶剂均不能破坏其结构，其外在的物理性能反而一般
C. 对酸、碱的侵蚀很敏感
D. 对吸收货品速度慢，但吸收率高，释放慢，并会留下痕迹
[单项选择]A number of biological sewage treatments plants are in use at sea but nearly all work on the principle called （）
A. deoxygenating
B. extended aeration
C. oxygenating
D. bubbling air
[单项选择]Modern marine diesel engines equipped with mechanical fuel injection operate on a combustion phase within the cycle which is（）
A. entirely constant pressure
B. entirely constant temperature
C. a combination of constant volume and constant pressure
D. a combination of constant temperature and constant pressure
[单项选择]Modern marine diesel engines using mechanical fuel injection, operate on a combustion cycle which is（）
A. a combination of constant volume and constant pressure
B. a combination of constant temperature and constant pressure
C. entirely constant pressure
D. entirely constant volume
[单项选择]Most troubles likely to occur with marine diesel engine can, if located in time, be remedied with no difficulty and many can be （）if the engine is maintained with a high sense of responsibility to the people on the part of the motormen and engineers.
A. found out
B. eliminated
C. avoided
D. lowered
[单项选择]The correct method of switching off a marine radar is to turn power switch to（）position first，then to（）position.
A. off／standby
B. standby／off
C. standby／close
D. close／standby
