单选题Electrical circuits are protected against overheating by means of a/an （）.Acircuit breakerBamplifierCdiodeDcapacitor
单选题
Electrical circuits are protected against overheating by means of a/an （）.
A
circuit breaker
B
amplifier
C
diode
D
capacitor
参考解析
解析：
暂无解析
相关考题：
Fusible plugs are installed in fire-tube boilers to _____.A.provide a means of draining the boilerB.warn the engineer of low water levelC.cool the crown sheet at high firing ratesD.open the burners electrical firing circuits
What are two benefits of the modular design of the Junos OS?() A. Each module uses application-specific integrated circuits (ASICs).B. Each module runs in its own protected memory space.C. Each module can be individually restarted.D. Each module is supported across all Junos platforms.
The part of the shipboard electrical system used to control the distribution of power to the branch circuits, is the ______.A.bridge control panelB.disconnect linksC.main switchboardD.governor relay box
Electrical circuits are protected against overheating by means of a/an _______.A.circuit breakerB.amplifierC.diode （二极管）D.capacitor
Electrical wiring on all "T-Boats" must be ______.A.concealed to prevent mechanical damageB.concealed so the boat can be maintained more easilyC.protected from the weatherD.in an accessible place behind the ceiling
The item ______ is not the advantage of the hydraulic winch．A.less jerky startsB.less jerky stopsC.overheating worriesD.none of the overheating worries
An ABC dry chemical fire extinguisher would be LEAST effective against a fire in ______.A.a mattressB.spilled liquids such as oil or paintC.high voltage electrical gearD.a trash can
What type of protection is implemented when the DBA issues the ALTER DATABASE SET STANDBY DATABASE PROTECTED； command？（）A、The standby database is protected against write operations. B、The primary database is protected against write operations. C、The primary database is protected against data loss and data divergence. D、The standby database is protected against data loss and data divergence.
单选题When electrical equipment is involved in a fire，the stream of dry chemicals should be（）.Aaimed at the source of the flamesBfogged above the equipmentCshot off a flat surface onto the flamesDused to shield against electrical shock
单选题The part of the shipboard electrical system used to control the distribution of power to the branch circuits, is the （）.Abridge control panelBdisconnect linksCgovernor relay boxDmain switchboard
单选题What type of protection is implemented when the DBA issues the ALTER DATABASE SET STANDBY DATABASE PROTECTED； command？（）AThe standby database is protected against write operations. BThe primary database is protected against write operations. CThe primary database is protected against data loss and data divergence. DThe standby database is protected against data loss and data divergence.
单选题Which statement concerning sweat damage in containers is TRUE?（）.ASweat damage in containers is unusual due to the small enclosed volume of airBIn general，containerized hygroscopic cargoes are the only ones subject to sweat damageCContainers should be ventilated，dehumidified，or the contents physically protected against sweat damageDSweat damage is not a problem except in insulated and refrigerated containers
单选题Electric generators can be protected against overload（）.AWith switchesBWith a governor on the engineCWith fuses or circuit breakersDBy using heavy wire
单选题Fusible plugs are installed in fire-tube boilers to （）.Aprovide a means of draining the boilerBwarn the engineer of low water levelCcool the crown sheet at high firing ratesDopen the burners electrical firing circuits
单选题Which of the following statements represents the FIRST precaution to be taken prior to working on any installed electrical component （）AWear rubber gloves and bootsBUse only approved non-conducting toolsCGround the case of the machine before beginning any repairsDOpen the supply circuits and tag the switches
多选题What are two benefits of the modular design of the Junos OS?（）AEach module uses application-specific integrated circuits (ASICs).BEach module runs in its own protected memory space.CEach module can be individually restarted.DEach module is supported across all Junos platforms.
单选题Electric circuits are protected against overloads and short circuits by means of a/an （）.Acircuit breakerBamplifierCdiodeDcapacitor
单选题When two DC generators operate in parallel, they are protected against motorizing by（）Ablow out coilsBgovernor relayCunder voltage tripsDreverse current trips
单选题An ABC dry chemical fire extinguisher would be LEAST effective against a fire in（）.Aa mattressBspilled liquids such as oil or paintChigh voltage electrical gearDa trash can
填空题在标准状态下，在氧势图或氯势图等中位置（）MeA的元素才能作为还原剂将MeA还原。