海船船员考试
单选题What is an advantage of a steam turbine over a diesel for the main propulsion?（）A Faster response from ahead to asternB Less fuel consumptionC Cheaper initial installation costD Less weight per unit of horsepower
题目
Faster response from ahead to astern
Less fuel consumption
Cheaper initial installation cost
Less weight per unit of horsepower
参考答案和解析
相似问题和答案
第1题：
A. lower cost
B. higher chirp
C. easier to manufacture
D. higher dispersion tolerance
E. higher optical signal-to-noise ratio
第2题：
What is the major advantage of a rhumb line track?
A.The vessel can steam on a constant heading (disregarding wind，current，etc)
B.The rhumb line is the shortest distance between the arrival and departure points
C.It is easily plotted on a gnomonic chart for comparison with a great circle course
D.It approximates a great circle on east-west courses in high latitudes
第3题：
A.electrical
B.mechanical
C.chemical
D.potential
第4题：
What is an advantage of a gate valve over a butterfly valve ________．
A.Less frequent maintenance
B.Faster operation
C.Cheaper
D.More compact
第5题：
Which method should be used to warm up the pump turbines prior to discharge ________．
A.Lock the turbine rotor and slowly bleed in steam until operating temperature is reached
B.Run the pump at high speed with the discharge valves closed
C.Run the turbine at slow speed with the pump disconnected
D.Shut the discharge valve and run the pump at slow speed
第6题：
The separation of impurities and water from ______is essential for good combustion of diesel engines.
A.lube oil
B.fuel oil
C.turbine oil
D.grease
第7题：
What is/are the advantage（s）of cranes over conventional cargo booms ________．
A.Cranes are able to pick up and drop loads over a greater spotting area
B.Increased safety because the deck is clear of running and standing rigging
C.Simplicity of operation of the crane by its operator
D.All of the above
第8题：
As for turbine oil, contact with water in the form of steam will be inevitable so good______properties will be essential
A.defrosting
B.de-oiling
C.demulsifying
D.dehumidifying
第9题：
Centrifugal pumps have what advantage（s）over reciprocating pumps ________．
A.They are less expensive
B.They are smaller for equivalent pumping ability
C.They pump more cargo in less time
D.All of the above
第10题：
What is an advantage of diesel over steam turbine propulsion ________．
A.Less fuel consumption per SHP
B.Diesel fuel costs less than bunker C or its equivalent
C.Less routine maintenance required
D.Less weight per SHP