更多"Which of the following devices are "的相关试题:
[单项选择]Which of the following tensioning devices is used with webbing to secure light vehicles aboard Ro-Ro vessels（）.
A. Chain lever
B. Buckle tensioner
C. Adjust-a-matic tensioner
D. Turnbuckle
[多项选择]Which of the following devices can an administrator use to segment their LAN?（）
A. Hubs
B. Repeaters
C. Switches
D. Bridges
E. Routers
F. Media Converters
G. All of the above
[单项选择]Which of the following devices is common to both mechanical and hydraulic governors?（）
A. Direct linkage between the ball-head and fuel rack
B. A servomotor
C. A compensating device
D. Flyweights
[单项选择]Which of the following devices is a common basic element with nearly all mechanical governors?（）
A. Power piston
B. Control rack
C. Weights acted on by centrifugal force
D. Isochronous droop spring
[单项选择]Signaling devices which are required on inflatable liferafts include（）.
A. a rocket shoulder rifle
B. an oil lantern
C. red flares
D. an air horn
[单项选择]Which of the following is operated from the main engine room console on an automated vessel?（）
A. Fire pump and lube oil pump
B. Lube oil pump and distilling plant
C. Distilling plant and shaft alley door
D. Shaft alley door and fixed CO2 release
[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 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]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]Bulkheads which from part of the tanks on a vessel are stiffened to withstand（）.
A. deck loads from above
B. dynamic forces while afloat
C. hydrostatic pressure
D. over-pressurization
[单项选择]Which of the listed devices would be installed at a control system air pressure reducing station?（）
A. Moisture separator
B. Vacuum breaker
C. Lubricator
D. Non-return valve
[单项选择]Which of the following statements about transmitting distress messages by radiotelephone is INCORRECT?（）
A. If no answer is received on the designated distress frequencies，repeat the distress call on any frequency available
B. Channel 16 (156.8) may be used for distress messages
C. It is advisable to follow a distress message on 2182 kHz by two dashes of 10 to 15 seconds duration
D. Distress messages should first be transmitted on 2182 kHz
[单项选择]Which of the following statements concerning cargo is correct?（）
A. Cargoes are any type of goods transported by any type of ships
B. Cargoes are goods transported in bulk
C. Cargoes usually include goods transported in bulk and in containers
D. Cargoes are usually packaged in containers
[单项选择]Which of the following statements concerning frontal movements is TRUE（）.
A. The temperature rises after a cold front passes
B. The barometric pressure rises when a warm front passes
C. A cold front generally passes faster than a warm front
D. A warm front usually has more violent weather associated with it than a cold front
[单项选择]Which of the following centrifugal pump components converts the liquid kinetic energy of velocity to the potential energy of pressure?（）
A. Impeller
B. Electric motor
C. Volute
D. Eye
[单项选择]Which of the following descriptions best identifies the operating principal of a flash-type evaporator?（）
A. Sea water is heated to boiling temperature while under a vacuum
B. Sea water is passed over heated plates in a thin film
C. Heated sea water is injected into a vacuum chamber
D. Sea water is forced through a heated eductor
[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 machinery space operations is required to be logged in the Oil Record Book?（）
A. Ballasting or cleaning of fuel oil tanks
B. Shifting suction of main fuel pump to reserve fuel oil tank
C. Changing out sprayer plates to adjust for steam demand
D. Daily inspection of engine room bilges
