【简答题】Find a synonym to replace the words in the sentence in bold WITHOUT changing the meaning! Ensure that the word you replace it with is grammatically correct in the sentence. "It is an unprecedentedly d...
【简答题】Fill in each blank by using the correct forms of the expressions given below: all the top; come into view; change into; in all directions; lead up to; look up at; safety belts; take a special class Th...
【单选题】which of the following statements is correct concernign available astern powr for diesel main propulsion systems?
A.
Astern power is to be provided in a sufficient amount to secure proper control of the ship in all normal circumstances
B.
The astern powr of the main propelling machinery is to provide for continuous operation astern at 60% of the ahead rpm at rated speed.
C.
For main propulsion systems without reversing gears, controllable pitch propellers or electric propulsion drive, running astern is not to lead to overload conditions.
D.
Astern power available will be equal to ahead power when controllable pitch propellers are utilized, thus discounting the need for increased operating parameters.