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发布时间:2023-10-16 10:51:29

[单项选择]To correct the condition of slugging and flooding back in a refrigeration system, it may be necessary to ().
A. re-adjust the discharge pressure
B. clean the expansion valve screen
C. add refrigerant
D. adjust the expansion valve

更多"To correct the condition of sluggin"的相关试题:

[单项选择]“Flooding back” is a condition where the liquid refrigerant ().
A. vaporizes in the condenser
B. reaches the compressor through the suction line
C. flashes in the liquid line
D. condenses in the receiver
[单项选择]Progressive flooding is controlled by securing watertight boundaries and().
A. transferring water ballast
B. jettisoning cargo
C. pumping out flooded compartments
D. abandoning ship
[单项选择]Carbon dioxide flooding system is used for extinguishing fires because it reduces the concentration of oxygen in the air to().
A. flashing point
B. combustion point
C. auto-ignition point
D. lower explosive limit
[单项选择]Flooding of any compartment in a ship that results in a serious loss of reserve buoyancy will always().
A. increase the trim
B. increase ship stability
C. cause a serious list
D. decrease the heeling moment
[单项选择]Control of flooding should be addressed().
A. first
B. following control of fire
C. following restoration of vital services
D. only if a threat exists
[单项选择]Progressive flooding on a ship is controlled by securing watertight boundaries and().
A. transferring drill water
B. dumping bulk materials
C. pumping out flooded compartments
D. evacuating the unit
[单项选择]Progressive flooding may be indicated by().
A. ballast control alarms
B. excessive draft
C. excessive list or trim
D. a continual worsening of list or trim
[单项选择]Accidental flooding of the engine room bilges by the bilge main is prevented by ().
A. stop-check valves installed in the bilge manifolds
B. using a positive displacement reciprocating bilge pump
C. installing eductors in all bilge rose boxes
D. installing a swing check before each bilge valve
[单项选择]SYN Flooding攻击的原理是什么?()
A. 有些操作系统协议栈在处理TCP连接时,其缓存区有限的空间不能装载过多的连接请求,导致系统拒绝服务
B. 有些操作系统在实现TCP/IP协议栈时,不能很好地处理TCP报文的序列号紊乱问题,导致系统崩溃
C. 有些操作系统在实现TCP/IP协议栈时,不能很好地处理IP分片包的重叠情况,导致系统崩溃
D. 有些操作系统协议栈在处理IP分片时,对于重组后超大的IP数据包不能很好得处理,导致缓存溢出而系统崩溃
[单项选择]The C02 flooding system is actuated by a sequence of steps which are().
A. break glass,pull valve,break glass,pull cylinder control
B. sound evacuation alarm,pull handle
C. open bypass valve,break glass,pull handle
D. open stop valve,open control valve,trip alarm
[单项选择]The radiotelegraphy safety messages for condition indicating distress,urgency and safety,respectively,are().
A. SOS,ZZZ,XXX
B. SOS,UUU,SSS
C. SOS,XXX,TTT
D. SOS,TTT,UUU
[单项选择]Which statement is generally correct regarding the maintenance requirements for ships under GMDSS().
A. Redundancy of functions of certain equipment will partially meet this requirement
B. On-board maintenance provided by a person holding a GMDSS maintainer's license will partially meet the requirements
C. Shoreside maintenance and scheduled tests and inspections will partially meet this requirement
D. All of the above
[单项选择]The worst atmospheric condition for dispersion of H2S is().
A. heavy rain
B. gusty winds with rain
C. nearly calm,clear nights or early morning
D. full sun with high winds
[单项选择]Which condition represents the appropriate time for setting off distress flares and rockets? ()
A. Only when there is a chance of their being seen by rescue vessels
B. At half hour intervals
C. At one hour intervals
D. Immediately upon abandoning the vessel
[单项选择]Which condition suggests that your present position lies in the navigable semicircle of a tropical storm().
A. A backing wind
B. A veering wind
C. Sustained gale force winds
D. A strong wind that maintains a constant speed and direction
[单项选择]The officer responsible for the sanitary condition of the engineering department is the ().
A. Master
B. Chief Mate
C. Chief Engineer
D. First Assistant

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