更多"A piston is said to be at top dead "的相关试题:
[单项选择]A piston is at bottom dead center when it is（）
A. opening the exhaust ports
B. closing the fuel ports
C. farthest from the cylinder head
D. nearest to the cylinder head
[单项选择]When we have agreed broadly on what should be said, the secretary will produce a preliminary （）for the committee's approval.
A. project
B. design
C. draft
D. drawing
[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]Every existing product carriers of 40000 tons deadweight and above shall be provided with segregated ballast tanks and shall comply with the specified requirements，or，alternatively，operate with（）in accordance with the convention.
A. Crude Oil Washing
B. dedicated clean ballast tanks
C. cargo tank cleaning system
D. Oil Record Book
[单项选择]
The exhaust valve opens before bottom dead center in a four stroke engine to（）
Ⅰ.allow for blow down
Ⅱ.Reduce pumping losses
A. Ⅰ only
B. Ⅱ only
C. both Ⅰ and Ⅱ
D. neither Ⅰ nor Ⅱ
[单项选择]A vessel sighting a northern right whale dead ahead should（）.
A. maintain course and speed
B. alter course to give a wide clearance
C. report the whale's position to the Canadian Coast Guard
D. All of the above
[单项选择]You should plot your dead reckoning position（）.
A. From every fix or running fix
B. From every estimated position
C. Every three minutes in pilotage waters
D. Only in pilotage waters
[单项选择]At bottom dead center, the centerline of the connecting rod usually coincides with the（）
A. angularity of the piston motion
B. inertia moment from the piston
C. centerline of the cylinder
D. centerline of the king pin
[单项选择]A dead reckoning (DR) plot（）.
A. ignores the effect of surface currents
B. is most useful when in sight of land
C. must be plotted using magnetic courses
D. may be started at an assumed position
[单项选择]The claim for dead freight being a claim for damages for breach of contract，the Shipowner is under a duty，where the Charterer fails to load a full and complete cargo，（）the damage by obtaining other cargo，provided he acts reasonably in so doing.
A. to minimize
B. minimizing
C. minimized
D. have minimized
[单项选择]You should plot your dead reckoning position at（）.
A. every fix or running fix
B. every course change
C. every speed change
D. All of the above are correct
[单项选择]A vessel is approaching from dead ahead． Both of her sidelights are visible and her range lights are in line. Which of the following could you do first?（）.
A. Sound one blast of the whistle
B. Alter course to starboard
C. Construct a radar plot
D. Sound the danger signal
[单项选择]A single line of position combined with a dead-reckoning position results in a(n)（）.
A. estimated position
B. assumed position
C. fix
D. running fix
[单项选择]Switchboards may be of the dead-front type in which all live parts are installed behind （） and only the operation handles and instruments are on the front.
A. the capstan
B. the collector
C. the panels
D. the surface
[单项选择]A “dead front” switchboard is one （）.
A. without switches on it
B. with insulated switches and no exposed terminals
C. without circuit breakers
D. without safety hand nails nor rubber mats
