[单项选择]All the following is true except that（）.
A. in many places a counter current flows in opposition to the main current close to the bank
B. current can vary with depth of water and large deep draught ships can experience different current effects at differing parts of the hull tend to turn to the wind
C. as speed is reduced，the increased proportion of the ship's vector which is attributable to current will set the ship close to obstructions
D. when close to the berth in a head current，there is a danger that flow inshore of the ship becomes restricted and the ship is subject to interactive forces

[单项选择]All the following except（）are fittings for securing and lashing containers on board ships.
A. stackers
B. twistlock
C. bridge fittings
D. containment booms

[单项选择]All of the following are engaged in fishing EXCEPT（）.
A. A vessel trawling
B. A vessel trolling
C. A vessel setting nets
D. A vessel tending lines

[单项选择]All of the following are distress signals EXCEPT（）.
A. the continuous sounding of any fog signal apparatus
B. giving five or more short and rapid blasts of the whistle
C. firing a gun at intervals of about a minute
D. a barrel with burning oil in it，on deck

[多项选择]Which of the following are true statements regarding the characteristics of OSPF areas? Select all that apply.（）
A. All OSPF networks require the use of multiple areas
B. Multiple OSPF areas must connect to area 0
C. Single area OSPF networks must be configured in area 1
D. Areas can be assigned any number from 0 to 63535
E. Area 0 is called the backbone area
F. Each OSPF area need to be configured with a loopback interface

[多项选择]Which of the following are true regarding bridges and switches?（）
A. Bridges are faster than switches because they have fewer ports.
B. A switch is a multiport bridge.
C. Bridges and switches learn MAC addresses by examining the source MAC address of each frame received.
D. A bridge will forward a broadcast but a switch will not.
E. Bridges and switches increase the size of a collision domain.

[单项选择]Which of the following is true?（）
A. A company should develop an ISM and implement it
B. A company implementing an ISM properly may obtain a DOC
C. Once a company obtains its DOC, each vessel of this company will obtain a SMC
D. DOC is valid for 60 months unless “major non-conformity” is found

[单项选择]Which of the following is true regarding the use of switches and hubs for network connectivity（）。
A. Switches take less time to process frames than hubs take.
B. Switches do not forward broadcasts.
C. Hubs can filter frames.
D. Using hubs can increase the amount of bandwidth available to hosts.
E. Switches increase the number of collision domains in the network.

[单项选择]Which of the following is true about the fuel injection with an ordinary diesel engine?（）
A. The process begins after TDC
B. The process ends before TDC
C. When the piston is near to the TDC the fuel injection ends
D. None of the above is true

[单项选择]The following options are all the functions of lubricating oil except（）
A. removing heat and deposits
B. neutralizing acidic products
C. lubricating
D. improving combustion efficiency

[多项选择]Which of the following statements are true regarding bridges and switches (Choose 3.)（）。
A. Switches are primarily software based while bridges are hardware based.
B. Both bridges and switches forward Layer 2 broadcasts.
C. Bridges are frequently faster than switches.
D. Switches have a higher number of ports than most bridges.
E. Bridges define broadcast domains while switches define collision domains.
F. Both bridges and switches make forwarding decisions based on Layer 2 addresses.

[多项选择]Which three of the following descriptions are true about the firewall modes? （）
A. Transparent mode is layer 2.
B. Routed mode is layer 3.
C. Routed mode has 1 IP address.
D. Transparent mode has 1 IP address.

[单项选择]Which of the following statements is true regarding the installation of piston rings on two-stroke/cycle, diesel engines as compared to four-stroke/cycle, diesel engines?（）
A. In a two-stroke/cycle engine, the rings run hotter, requiring the end gap to be greater
B. Some provision must be made in a two-stroke/cycle engine to keep the rings from binding in the ports
C. No gap is required to exist between the ends of the ring when cold in a two-stroke/cycle engine, but a small gap is required in a four-stoke/cycle engine
D. The gaps should be staggered on either side of a piston in a two-stroke/cycle engine, while staggering is not necessary in a four-stroke/cycle engine

[单项选择]Which of the following conditions is true concerning a flammable liquid with a concentration above the upper explosive limit?（）
A. The mixture is too lean to burn
B. The mixture is too rich to burn
C. The vapor is about to explode
D. Conditions are perfect for combustion

[单项选择]Which of the following statements is TRUE regarding automatic identification systems (AIS) ?（）
A. AIS cannot be used to make passing arrangements because the system is not capable of this type of ship-to-ship communications
B. AIS cannot be used to make passing arrangements because the ship-to-ship text messaging feature is for emergency use only
C. AIS can be used to make passing arrangements via ship-to-ship text messaging but a vessel operator is not relieved from the requirement to sound whistle signals or make arrangements via bridge-to-bridge radiotelephone
D. AIS can be used to make passing arrangements via ship-to-ship text massaging thus relieving a vessel operator from making such arrangements via bridge-to-bridge radiotelephone or signaling intent to pass via whistle signals