5. What kind of pumps is applying the action of piston to force the liquid?
(A) Screw pumps
(B) Gear pumps
(C) Reciprocating pump
(D) Centrifugal pumps
10. 發現 二號主冷卻海水泵馬達電樞線圈燒毀A burnt ______ windings of electric motor of
No.2 main cooling sea water pump was discovered.
(A) circuit
(B) rotor
(C) armature
(D) pole
11. What system in boiler is to respond rapidly throughout the range of operation without a
fireman’s attention is of prime importance for a marine boiler.
(A) Blower
(B) Fuel-burning
(C) Water feeding
(D) Rolling
21. The steering gear, bow or stern thrusters, anchor handling system, mooring equipment,
ship stabilization system and the cargo systems are classified as ___________.
(A) the hull machinery systems
(B) the navigating machinery systems
(C) the vessel machinery systems
(D) the deck gear systems
26. The principal reason for turbocharging is to increase the power output of an engine of
given size and speed, by enabling the cylinders to be charged with air at an elevated pressure
and, therefore, at a higher density than air at atmospheric pressure. What is the main purpose to
use a turbocharger？
(A) To elevate the density of air in order to decrease the pressure in cylinder.
(B) To elevate the pressure of air in order to decrease the density in cylinder.
(C) To improve the power output of an engine of given size and speed by increasing the
compressed air intake temperature.
(D) To improve the power output of an engine of given size and speed by increasing the density of
charged air.
27. The minimum temperature to which the exhaust gas is cooled is also a limitation since, in
order to avoid what in the cold end of the boiler and stack, the temperature should not be allowed
to drop below the acid dew point？
(A) fatigue
(B) thermal fatigue
(C) creeping
(D) corrosion
30. What are the speeds of the rotors that shall be carefully calculated in order to avoid the
resonance at normal running speeds？
(A) Exciting speeds
(B) Virtual speeds
(C) Critical speeds
(D) Damping speeds
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