4. ____________is the gas exchange process in which the charge air passes straight up
through the length of the cylinder, forcing the exhaust gas through exhaust valve at
the top of the cylinder.
(A) Loop flow scavenging
(B) Cross flow scavenging
(C) Uniflow scavenging
(D) Standard flow scavenging
9. It is obviously impossible to regulate the decreasing pressure by a single cock or
screw-down valve, when the steam pressure would decrease because the demand for steam
on the varied side. What equipment is above description?
(A) Globe valve
(B) Reducing valve
(C) Quick closing valve
(D) Gate valve
26. _________ is the process of removing exhaust gases from the cylinder after
combustion and replenishing the cylinder with fresh air.
(A) Soot blowing
(B) Scavenging
(C) Surging
(D) Stripping
35. Stainless steel bellows expansion joints are commonly used since they will absorb
movement or vibration in several planes, eliminate maintenance and reduce friction and
heat loss. Which caution is not necessary to do when expansion joints are installed?
(A) The joint is installed at its length more than the limit.
(B) Maximum and minimum working temperatures must be considered when choosing the joint.
(C) The joint must be so installed that it is neither over-compressed nor over-extended.
(D) The installation length must be appropriate to the temperature at installation.
36. Which is not feature of rotary pumps?
(A) Wear decreases the clearances with consequent loss of efficiency, especially when
handing low viscosity fluids.
(B) They are self-priming.
(C) They are capable of producing high vacuum.
(D) They give a steady flow, but are less efficient than reciprocator because
differential pressure between suction and discharge.
10. The followings are procedures of start the engine. Which step is incorrect?
(A) Set the stop lever in the RUN position.
(B) Make sure the pressure indicator cock is closed.
(C) Set the operation selector switch to the ENGINE position control panel to be
selected.
(D) Make sure the gear pump is in the GEAR OUT position.
3. __________ is the gas exchange process in which the charge air passes over the piston crown
and rises to form a loop within the cylinder, expelling exhaust gases through exhaust ports cut in
the same side of the liner above the scavenge ports.
(A) Loop flow scavenging
(B) Cross flow scavenging
(C) Uniflow scavenging
(D) Standard flow scavenging
8. In case of a failure of the engine _________ occurred during maneuvering , the main engine
control mode can be changed to an emergency control stand at local.
(A) monitoring system
(B) fuel oil system
(C) lube oil system
(D) control system
13. 09:30 Transferred bilge water from portside engine room forward bilge well to _______________
.
(A) overboard directly
(B) bilge water holding tank
(C) boiler water feed tank
(D) sewage water collecting tank
14. Which kind of the membrane desalination process can provide a proven capability to
effectively and continuously generate fresh water from seawater?
(A) assimilation
(B) diffusion
(C) dissipation
(D) reverse osmosis
29. Which physical property for the diesel engine fuel is usually assessed as energy per unit
mass？
(A) Viscosity
(B) Diffusivity
(C) Heating value
(D) Thermal conductivity
38. Which type of marine propulsive engine can offer the advantages of relativily low weight and
space requirements？
(A) Diesel engine
(B) Steam turbine engine
(C) Gas turbine engine
(D) Steam reciprocating engine
39. Which technical term is referred to as the zero-potential reference of an
electric/electronic system？
(A) Penetration
(B) Filtering
(C) Shielding
(D) Ground
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