投资的计划值和实际值是相对的，相对于工程预算而言，()是投资的计划值。

During sea trial, the main engine will be kept run at______load

A.100%

B.110%

C.85%

D.different

A.the same, whether at sea, or during maneuvering

B.adjusted during each hour of operation while at constant RPM

C.higher at sea than while maneuvering

D.lower at sea than while maneuvering

A.a brief trial with turning gear

B.a brief trial on power

C.a long trial by steering gear

D.one minutes trial with windlass

A.the running hours of the cooling water pump

B.chief engineer’s order

C.the main parameters of main and auxiliary equipment

D.the position of the vessel

A.power of main engine

B.turbine rotation speed

C.speed of main engine

D.exhaust temperature

A.the main propulsion plant

B.lifesaving jackets

C.lifeboat engine

D.state of emergency generator

A.the exhaust temperature

B.the speed of main engine

C.the turbine rotation speed

D.the power of main engine

A.with power

B.on power

C.with air

D.on air

In modern installations, the main engine and the standby auxiliary engines .

A.can be started at low temperature and are free from preheating

B.usually are preheated by steam before being started

C.are kept at a constant temperature and free from preheating

D.are kept at a low temperature to save energy

After finished the engine, which of valves cannot be shut off by the duty engineer？

A.fuel valve

B.the starting air valve

C.the sea chest

D.the main sea pump inlet valve