更多"Which of the following materials is"的相关试题:
[单项选择]All of the following are practices of good seamanship EXCEPT（）.
A. When meeting，altering course to the left to increase sea room
B. Maintaining an alert radar watch in reduced visibility
C. Showing a flare-up light to attract attention when you are not under command
D. Maintaining a proper lookout from sunrise to sunset
[单项选择]In the ship construction portfolio，materials which do not conform to ASTM or ABS specifications must also include the（）.
A. chemical and physical properties of the material
B. name of the alternative standard or specification
C. the ASTM or ABS specification the material approximates
D. manufacturer or origin of the material
[单项选择]As to the bearing, of the following, which statement is not true?（）
A. ff overheat is found, the engine must be stopped for inspection
B. Much heat of the crankcase door indicates that the bearing is overheated
C. If bearing clearance is too large, knocking will be heard in the crankcase
D. If bearing clearance is too large or too small, the white metal may be melted
[单项选择]Which of the following is not a factor which can interfere with the pulse of sound and cause a variation the depth reading?（）
A. salinity
B. temperature
C. the hydrostatic pressure
D. Vessel’s speed
[单项选择]As to the piston cooling, of the following, which statement is not true?（）
A. Because the piston is exposed to very high temperature, it must be cooled
B. The lower the piston cooling temperature is, the better it is
C. Both water and lube oil can be used as coolant
D. One of the piston cooling methods is vibration cooling, with better effect
[单项选择]Which of the following relationships should occur between the temperature developed in a combustion space, and the compression ratio of the engine?（）
A. Higher compression ratios create higher temperature
B. Higher temperatures create higher compression ratios
C. low temperatures create higher compression ratios
D. Higher compression ratios create low temperatures
[单项选择]Which of the following conditions could contribute to the cracking of a diesel engine cylinder head?（）
A. Leaking seal ring
B. Insufficient heat transfer from the exhaust valves
C. Block cooling water passages to the head
D. Excessive scavenging air provided to the engine
[单项选择]Which of the listed burning materials would be described as a class "B" fire?（）
A. Acetylene
B. Lube oil
C. Grease
D. All of the above
[多项选择]Which of the following are key characteristics of PPP?（）
A. can be used over analog circuits
B. maps Layer 2 to Layer 3 address
C. encapsulates several routed protocols
D. supports IP only
E. provides error correction
[多项选择]Which of the following are benefits provided with access control lists (ACLs)?（）
A. ACLs monitor the number of bytes and packets.
B. Virus detection.
C. ACLs dentify interesting traffic for DDR.
D. ACLs provide IP route filtering.
E. ACLs provide high network availability.
F. ACLs classify and organize network traffic.
[单项选择]Which of the following will increase the positive stability of your vessel?（）.
A. Loading weight on deck
B. Discharging weight from lower decks
C. Shifting weight from upper to lower decks
D. Shifting weight from lower to upper decks
[单项选择]Which of the following statements describes one of the functions of the ballast system?（）
A. To permit flooding of any fuel oil storage tank on any class of ship
B. To use it as a secondary service system
C. To store reserve feed or potable water for extended cruises
D. To stabilize the ship by flooding certain designed tanks with seawater
[单项选择]Which of the following operations aboard a tanker must be recorded in the Oil Record Book（）.
A. Any internal transfer of oil cargo during a voyage
B. The discharge overboard in port or at sea of any bilge water accumulated in machinery spaces
C. The loading or unloading of any or all oil cargo
D. All of the above
[单项选择]Which of the following influences the position of the interface between the liquid seal and the oil in a purifier?（）
A. Height of the machine
B. Temperature of the liquid seal
C. Gravity disc
D. Bowl diameter
[单项选择]Which of the following statements is true concerning carbon dioxide when used as a fire extinguishing agent?（）
A. Carbon dioxide is corrosive when exposed to fire
B. Carbon dioxide should be applied slowly to a large engine room fire
C. Its total cooling effect is far greater than water
D. Its smothering effect is excellent for class B fires
[单项选择]Which of the following statements is TRUE regarding automatic identification systems (AIS)? （）
A. AIS is a short-range VHF-FM system that automatically broadcasts a vessel's position，course，speed and other safety related information to all those with similar equipment in the area
B. AIS is a one-way centrally managed system that requires the local VTS to send commands to instruct each vessel to broadcast position，course，speed and other safety related information to all those with similar equipment in the area
C. AIS is a global tracking system that relies upon INMARSAT C service to communicate vessel position，course，speed and other safety related information to all those with similar equipment in the area
D. AIS is a short-range 3 cm X-band radar system that automatically sends a vessel's position，course，speed and other safety related information to all those with similar equipment within the area
[单项选择]Which of the following conditions could cause the feed pump for an auxiliary boiler to lose suction?（）
A. Increased suction head pressure
B. Decreased feedwater temperature
C. Pump recirculating line being open too much
D. Excessive feedwater temperature
