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停堆冷却系统 shutdown cooling system
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考题
What is head tank in the closed cooling water system used for?A.for the release of air from the cooling waterB.providing expansion room for heated cooling waterC.a place for implementing water and water treatment agentD.all of the above
考题
Low compressor head pressure in a refrigeration system can be caused by ___.A.insufficient condenser cooling waterB.excessive condenser cooling waterC.air in the refrigeration systemD.excessive refrigerant in the system
考题
Which of the following can an operator use to shutdown a system into single－user mode?()
A.shutdown -dB.shutdown -sC.shutdown -mD.shutdown -Fr -s 1
考题
High diesel engine cooling water temperatures can be caused by ______.A.air in the cooling systemB.an overhauled water pumpC.correct amount of coolantD.no air in the cooling system
考题
Why is it necessary to have routine testing of the cooling water?A.To ensure that the proper residuals of treatment chemicals, as specified, are maintained all timeB.To trace leakage in the cooling water systemC.It is not necessaryD.To detect the presence of contaminants in the water that may be injurious to the cooling system
考题
A customer wants to install a pSeries system into an OEM rack. What critical information is provided in the Site and Hardware Planning Information manual？（）A、System dimensions and weight， system power and cooling requirements， and list of supported OEM racksB、System dimensions and weight， list of supported OEM racks， and requirements for installing IBM systems into OEM racksC、System performance specs， system power and cooling requirements， and requirements for installing IBM systems into OEM racksD、System dimensions and weight， system power and cooling requirements， and requirements for installingIBM systems into OEM racks
考题
核岛的核蒸汽供应系统有（）。A、一回路主系统、化学和容积控制系统、余热排出系统（又称停堆冷却系统）、安全注射系统（又称紧急堆芯冷却系统）、控制、保护和检测系统；B、设备冷却水系统、硼回收系统、反应堆的安全壳及喷淋系统、核燃料的装换料及贮存系统、安全壳及核辅助厂房通风和过滤系统、柴油发电机组；C、一回路主系统、化学和容积控制系统、余热排出系统（又称停堆冷却系统）、设备冷却水系统、反应堆的安全壳及喷淋系统；D、核燃料的装换料及贮存系统、安全壳及核辅助厂房通风和过滤系统、一回路主系统、化学和容积控制系统、余热排出系统（又称停堆冷却系统）、安全注射系统（又称紧急堆芯冷却系统）。
考题
Which of the following accurately describes the meaning of redundant cooling？（）A、The source of cooling to a RAID systemB、The cooling system in a redundant power supplyC、A cooling system that can be installed in case of failureD、A second cooling system in case of a failure
考题
Which of the following can an operator use to shutdown a system into single-user mode?（）A、shutdown -dB、shutdown -sC、shutdown -mD、shutdown -Fr -s 1
考题
单选题Low compressor head pressure in a refrigeration system can be caused by（）.A
insufficient condenser cooling waterB
excessive condenser cooling waterC
air in the refrigeration systemD
excessive refrigerant in the system
考题
单选题The cooling system（） needs least maintenance work for in this kind of system（）A
open；the minimum componentsB
open；the high cooling efficiencyC
central；there are more coolers and a extra set of pumpsD
central；there is only one component contacts seawater
考题
单选题A customer wants to install a pSeries system into an OEM rack. What critical information is provided in the Site and Hardware Planning Information manual？（）A
System dimensions and weight， system power and cooling requirements， and list of supported OEM racksB
System dimensions and weight， list of supported OEM racks， and requirements for installing IBM systems into OEM racksC
System performance specs， system power and cooling requirements， and requirements for installing IBM systems into OEM racksD
System dimensions and weight， system power and cooling requirements， and requirements for installingIBM systems into OEM racks
考题
单选题Where is the cooling water from the compensating tank in the cooling water system of main engine lead to?（）A
discharge side of the centrifugal pumpB
suction side of the centrifugal pumpC
the lowest point of the cooling water systemD
inlet of the main engine
考题
单选题High diesel engine cooling water temperatures can be caused by （）.A
air in the cooling systemB
an overhauled water pumpC
correct amount of coolantD
no air in the cooling system
考题
单选题In a closed cooling system for a turbocharged, four-stroke/cycle diesel engine, fluctuating water pressure can be caused by （）A
improper venting of the cooling systemB
carrying the expansion tank water level too highC
a totally clogged impeller in the cooling water pumpD
an incorrectly set cooling system temperature control
考题
单选题Which of the following accurately describes the meaning of redundant cooling？（）A
The source of cooling to a RAID systemB
The cooling system in a redundant power supplyC
A cooling system that can be installed in case of failureD
A second cooling system in case of a failure
考题
单选题A separate piston cooling system is used to limit any contamination （） piston cooling glands（） the piston cooling system only.A
between；toB
either；orC
from；toD
neither；nor
考题
单选题As an alternative to the conventional seawater cooling system, is based on principles about cooler locations, （）flow control and preheating, but with a central cooler and one additional set of pumps（）.A
the central cooling system, differentB
the central cooling system, the sameC
the open cooling system, differentD
the open cooling system, the same
考题
单选题Which of the following problems can cause fluctuating pressures in the closed cooling system of a main propulsion diesel engine?（）A
Defective temperature controls in the systemB
Cavitation in the cooling water pumpC
Opened vent in the cooling systemD
Restricted water passages in the engine
考题
单选题Temperature control valves installed in the jacket cooling water system of a diesel engine modulates the rate of water flow through the （）.A
cooling water pumpB
nozzle cooling passagesC
cylinder jacketsD
heat exchanger
考题
单选题In the process of the stand-by, warm-up the engine usually through give preheat of which parts of the diesel engine?（）A
cooling water of the cooling systemB
fuel of the FO systemC
LO of the LO systemD
cooling water of the cooling system and LO of the LO system
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