What is an advantage of diesel over steam turbine propulsion? （）

What is an advantage of a steam turbine over a diesel for the main propulsion?（）

Among the main propulsion units on board the ship with the same capacity， the lightest one is（）.

Frequent ______ is important: fixing or changing faulty parts of the propulsion system when necessary.

Which of the following problems can cause fluctuating pressures in the closed cooling system of a main propulsion diesel engine?（）

The four-stroke engine is used for （） and sometimes for main propulsion with a gearbox to provide a propeller speed of between 90 to 120 rev/min.

In order to reverse the rotation of a two-stroke/cycle loop scavenged， direct reversing， propulsion diesel engine， the cam positions must be changed for the （）.

What are the main parts of submarine remote control vehicle?( ) A: Self propulsion B: Buoyancy control C: Ballast D: Pipeline

In the four-stroke engine， it takes （） to make one power stroke. A: one propulsion B: two propulsions C: two revolutions D: one revolutio

In the electric propulsion system, the power generation is often driven by____ A: the gas turbine B: the diesel engine C: A or B D: neither A or B