更多"When there are small differences be"的相关试题:
[单项选择]One of the main differences between the various types of screw pumps is in the （）.
A. stuffing box diameter
B. direction of rotation of the screws
C. pitch of the screws
D. type of driving gears
[单项选择]One of the differences between a two-stroke engine and a four-stroke engine is,（）
A. a two-stroke engine works without exhaust operation
B. a two-stroke engine works without compression stroke
C. a two-stroke engine works without expansion stroke
D. a two-stroke engine works without suction operation
[单项选择]In small-angle stability，when external forces exist，the buoyant force is assumed to act vertically upwards through the center of buoyancy and through the（）.
A. center of gravity
B. center of flotation
C. metacenter
D. metacentric height
[单项选择]When anchoring a small sailing vessel in rough weather，the best anchor line would be composed of（）.
A. chain-wire
B. chain-manila
C. chain-nylon
D. all chain
[单项选择]When a vessel navigates in an area with a small underkeel clearance but with adequate space to take avoiding action she（）.
A. should not be regarded as a vessel constrained by her draught
B. should be regarded as a vessel constrained by her draught
C. shall be regarded as a vessel restricted in her ability to maneuver
D. should be regarded as a non-displacement vessel
[单项选择]A capsized small sail vessel is best righted when what part of the vessel is downwind?（）
A. Stern
B. Bow
C. Centerboard
D. Mast
[单项选择]When the refrigeration demand is small,（）
A. the expansion valve will move toward the wide open position
B. the expansion valve will move toward the closing position
C. the feeler bulb will conveys the high temperature
D. the superheat degree will raise
[单项选择]The type of joint formed when a third small plate is riveted over two plates butted together is called a（）.
A. butted joint
B. lap joint
C. strap joint
D. stringer joint
[单项选择]When in operation, it is unavoidable that a small amount of oil （） through leakage, and in order to compensate for these leaks the system is connected to a feed pump.
A. escapes
B. overheats
C. expands
D. accelerates
[单项选择]Your vessel is taking on fuel oil when a small leak develops in the hose and you have ordered the pumping stoppedBefore resuming pumping，you should（）.
A. notify the terminal superintendent
B. place a large drip pan under the leak and ping the scuppers
C. repair the hose with a patch
D. replace the hose
[单项选择]A piece of small stuff (small line) secured to an object to prevent it from going adrift is a（）.
A. lanyard
B. keeper
C. noose
D. stopper
[单项选择]Longitudinal and transverse separtions between the tanks,which are used to prevent liquids from leaking from one double bottom tank into the other ,are called（）.
A. double bottoms
B. cofferdam
C. navigating bridge
D. superstructure
[单项选择]The difference between international and national Navtex Service is limited to（）.
A. frequency allocated
B. both language and frequency
C. language used
D. transmission power and time
[单项选择]The temperature differential occurring between the inlet temperature of the fluid to be cooled and the outlet temperature of the cooling medium in a shell-and-tube heat exchanger is greatest in which of the flow designs listed?（）
A. Cross
B. Parallel
C. Counter
D. Circular
[判断题]The distinction between competence and performance was proposed by F. de Saussure.
[单项选择]When can routine communications be resumed when radio silence has been imposed?（）
A. After determining that the frequency or channel appears to be no longer in use
B. After determining that geographic distance from the distress situation will prohibit any other signal from interfering with emergency communications
C. Routine communications can resume after the Rescue Coordination Center transmits a message on the frequency or channel being used for emergency communications stating that such traffic has concluded
D. If，in the Master's opinion，communications on that frequency will interfere with emergency communications
[单项选择]Possible phase relationships between voltage and current in an alternating current circuit include which of the following conditions?（）
A. Current and voltage may be in phase
B. Current may lead the voltage
C. Current may lag the voltage
D. All of the above
[单项选择]The difference between measured and desired values is called （）.
A. make-up
B. desired value
C. deviation
D. set value
