海船船员考试
单选题What is an advantage of diesel over steam turbine propulsion? （）A Less fuel consumption per SHPB Diesel fuel costs less than bunker C or its equivalentC Less routine maintenance requiredD Less weight per SHP
题目
Less fuel consumption per SHP
Diesel fuel costs less than bunker C or its equivalent
Less routine maintenance required
Less weight per SHP
相似问题和答案
第1题：
The main propulsion diesel engine jacket water temperature rises above normal, with the raw sea suction and the expansion tank water level being normal. Which of the following problems is most likely the cause?
A.Faulty thermostatic bypass valve
B.Eroded zinc pencils in the heat exchanger
C.Steam formation in the expansion tank
D.Excessive leakage from jacket water pump seals
第2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3题：
A.electrical
B.mechanical
C.chemical
D.potential
第4题：
What is an advantage of an externally modulated laser over a directly modulated laser?（）
- A、lower cost
- B、higher chirp
- C、easier to manufacture
- D、higher dispersion tolerance
- E、higher optical signal-to-noise ratio
正确答案:D
第5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
第6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7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：
B.impermeable rock
C.one or two separators
D.turbine operator
E.little or no water
F.hot springs
第10题：
the extra weight required for the diesel reduction gearing
a minimum speed for the engines that limits the minimum speed of the vessel
the higher fuel consumption per SHP
the low efficiency of the system when a controllable pitch propeller is used