8.8.In general, a cylinder of a diesel engine consists of a cylinder that is inserted in a cylinder block
and enclosed at the top by a cylinder head to form the combustion space above the piston.
10.10.Longitudinal vibration of propulsion shafting systems is often excited by the variable thrust
developed by the propeller due to the non-uniform wake pattern in which it operates. The
predominant periodic component of the thrust developed by a propeller occurs at blade-rate
frequency, i.e., the number of propeller blades times the rotational frequency of the shaft. For a four-blade propeller running at 60 rev/min, what is the predominant periodic frequency that excites
the longitudinal vibration of the propulsion shafting systems?
11.11.In the process of condensing the exhaust steam from the main or auxiliary turbines, steam
condensate is recovered and is reused as feedwater. In a properly designed and maintained
feedwater system the condensate is collected at the saturation temperature corresponding to
compensating pressure. Therefore, which is the false statement?
(A)The process inside a condenser is a constant pressure process.
(B)The process inside a condenser is a constant temperature process.
(C)The process inside an ideal condenser is a isentropic process.
(D)The increase of saturation temperature increases the pressure inside a condenser.
17.17.Actual diesel engines must reach temperatures above the of the fuel at the end of the
18.18.For a diesel engine an initial downward stroke of the piston draws in the air to charge the cylinder,
which is followed by the compression stroke, with the fuel being injected as top dead center is
approached, then a downward power stroke, and an upward exhaust stroke. Which type of engine
is called for this operation?
(D)Ideal cycle engine
23.23.Which procedure has the objective to ensure that when the engine is in service and under load, its
crankshaft axis is straight, uniformly supported by bearings, and properly positioned longitudinally?
(D)Measurement of crank deflection
37.37.At the end of each voyage, which document shall be prepared to summarize the events described
in the engine logbook during this particular voyage ?
(C)Watch keeping report
38.38.When the duty officer receives the bridge orders during the watch, what are the correct responding
(A)These bridge orders must be promptly implemented with a record for any requested changes in
the speed or direction of the ship.
(B)These bridge orders need to be authorized by the chief marine engineer prior to the
(C)These bridge orders must be confirmed by the captain prior to the implementations.
(D)Each bridge order must be checked for its applicability prior to the implementation.
39.39.In order to further increase the cycle efficiency of a gas turbine engine, which equipment is
installed between the low-pressure compressor and the high-pressure compressor so that the work
input for compressors is reduced?