38.Which operation is performed with the objective to ensure the axis of engine shaft is straight,
uniformly supported by the bearings and properly positioned longitudinally when the engine is
running and under load?
(A)Shop trial
(B)Engine alignment
(C)Towing tank test
(D)Dynamic balancing
30. Which device is used to provide a limited amount of electric power for a finite periods of time to
certain loads in case of a power failure on its supply side, with no break in the flow of power to the
loads?
(A) Power governor
(B) Transformer
(C) Solid-state power converter
(D) Uninterruptible power supply
22.The increase of compression ratio of a gas turbine with Brayton cycle will increase the .
(A)fuel consumption
(B)isentropic efficiency
(C)cut-off ratio
(D)thermal efficiency
17. Depending on the type of ships, the propulsive engines include
three types. Which is not?
(A) Air Turbine Engine
(B) Diesel Engine
(C) Steam Turbine Engine
(D) Gas Turbine Engine