20.下列何種裝備上,必須裝有緊急快關閥(Quick closing valve)?
(A)蒸餾水櫃(Distilling water tank)
(B)燃油櫃(Fuel oil tank)
(C)壓艙水櫃(Ballast water tank)
(D)壓縮空氣櫃(Compressed air tank)
32.Which device is used in a diesel engine to provide the required pressure for atomizing the
liquid fuel?
(A)Fuel injector
(B)Fuel injection pump
(C)Fuel filter
(D)Fuel rack
33.Which component of diesel engine could sustain the reciprocating forces at each cylinder
that act on the axis of cylinder?
(A)Crankshaft
(B)Turbocharger
(C)Fuel injection pump
(D)Fuel injector
34.For a gas turbine engine, which component converts the thermal energy in the hot, high
pressure gas stream into mechanical work?
(A)Turbine
(B)Compressor
(C)Combustor
(D)Rotating disc
35.A is a short flow passage of converging or converging-diverging flow area whose
function is to convert thermal or pressure energy into kinetic energy.
(A)compressor
(B)nozzle
(C)check valve
(D)pressure regulating valve
36.The stroke-to-bore ratio of a low speed engine is 3:1. When the stroke is 900 mm, the
diameter of bore is .
(A)2,700 mm
(B)300 mm
(C)3,600 mm
(D)225 mm
37.What is required on high temperature piping to limit the surface temperature for personnel
protection, reduce the heat loss from the system, or prevent objectionable heat gain in
enclosed spaces?
(A)Orifice
(B)Connecting-joint
(C)Ventilation
(D)Insulation
38.Which type of valve should be installed whenever an undesired reversal of flow is possible?
(A)Throttle valve
(B)Stop valve
(C)Check valve
(D)Relief valve
39.What is the main function of labyrinth packing in a steam turbine engine?
(A)To improve dynamic balance
(B)To increase critical speed
(C)To reduce vibration
(D)To minimize leakage of working fluid