单选题An interlock in the remote operating valve line stops the valve （） when the engine turning gear is engaged.Ato openBopeningCopenDopened
单选题
An interlock in the remote operating valve line stops the valve （） when the engine turning gear is engaged.
A
to open
B
opening
C
open
D
opened
参考解析
解析：
暂无解析
相关考题：
The statement “draws the line at operating on people” (Line 3, Paragragh 2) is closest in meaning to_____.［A］ removing wrinkles from the face［B］ helping people make up［C］ enjoying operating［D］ refusing to operate
_______is usually driven by the engine camshaft and supplies pilot air to the cylinder air start valve.A.An air receiverB.An operating valveC.An automatic valveD.An air distributor
Which of the following is a secure method of remote access via command line?() A.RCPB.TelnetC.RSHD.SSH
This graphic shows the results of an attempt to open a Telnet connection to router ACCESS1 from router Remote27. Which of the following command sequences will correct this problem? () A. ACCESS1(config)# line console 0 ACCESS1(config-line)# password ciscoB. Remote27(config)# line console 0 Remote27(config-line)# login Remote27(config-line)# password ciscoC. ACCESS1(config)# line vty 0 4 ACCESS1(config-line)# login ACCESS1(config-line)# password ciscoD. Remote27(config)# line vty 0 4 Remote27(config-line)# login Remote27(config-line)# password ciscoE. ACCESS1(config)# enable password ciscoF. Remote27(config)# enable password cisco
Which of the following is a secure method of remote access via command line?（）A、RCPB、TelnetC、RSHD、SSH
You have been recently hired as a database administrator. Your senior manager asks you to study the production database server and submit a report on the settings done by the previous DBA. While observing the server settings， you find that the following parameter has been set in the parameter file of the database： REMOTE_OS_AUTHENT = TRUE What could have been the reason to set this parameter as TRUE？（）A、to enable operating system authentication for a remote clientB、to restrict the scope of administration to identical operating systemsC、to allow the start up and shut down of the database from a remote clientD、to enable the administration of the operating system from a remote clientE、to disable the administration of the operating system from a remote client
单选题Which operation should be done when launching an inflatable liferaft by hand?（）AOpen the liferaft casingBTurn the valve on the CO2 cylinder to start inflationCMake sure the operating cord is secured to the vessel before throwing it over the sideDAfter inflation，detach operating cord from liferaft
单选题When operating the air supply system in a covered lifeboat the（）.Afuel supply valve should be closedBhatches，doors，and oar ports should be closedCair cylinder shut-off valve should be closedDengine should be shut off
单选题You have been recently hired as a database administrator. Your senior manager asks you to study the production database server and submit a report on the settings done by the previous DBA. While observing the server settings， you find that the following parameter has been set in the parameter file of the database： REMOTE_OS_AUTHENT = TRUE What could have been the reason to set this parameter as TRUE？（）Ato enable operating system authentication for a remote clientBto restrict the scope of administration to identical operating systemsCto allow the start up and shut down of the database from a remote clientDto enable the administration of the operating system from a remote clientEto disable the administration of the operating system from a remote client
单选题A more sophisticated pressure reducing valve incorporates a pilot valve which controls the fluid above the valve operating piston in response to downstream pressureThe bold and italic word “which” means （）.Aa pressure reducing valveBa pilot valveCan operating pistonDdownstream pressure
单选题Which of the problems listed represents the major difficulty encountered with thermal expansion valve operation?（）ALube oil passing through the systemBMoisture or foreign matter collecting at the valve seat and orificeCVariable spring tension caused by the changing temperatureDFrost on the liquid line
单选题Many diesel engine exhaust valves are being constructed with hollow stems filled with sodium in order to （）Aprovide added wear protection against today’s corrosive quality of fuelBincrease overall valve strength due to the high gas pressuresCassist in dissipating heat due to the extreme operating temperaturesDreduce the overall weight of the valve thus helping eliminate valve spring surge and hammering
单选题Fire protection regulations for towing vessels require any fuel line subject to internal head pressure from fuel in the tank to（）.Abe fitted with a positive fuel shut-off valve located at the tankBhave a shut-off valve at the top of the tankChave a gate valve easily accessible in the space where the tank is locatedDhave a drain cock at the lowest point in the fuel line
单选题A pressure drop through the refrigerant liquid line may cause （）.Asolenoid valve to seizeBcompressor to huntCformation of flash gas in the liquid lineDexpansion valve to freeze open
单选题A warmer than normal compressor suction line might be caused by （）.Ainsufficient lubricationBinsufficient refrigerantCexcess refrigerantDexcessive opening of the expansion valve
单选题The （） returns the pump operating rod to mid position as soon as the helmsman stops turning the wheel.Ahunting gearBcut-off levelCservo-motorDswivel block
单选题Diesel engine air start valve timing is controlled by（）Aengine operating speedBan air manifoldCa hydraulic distributorDindividual cams and valve gear
单选题The valve that prevents water from backing out of the boiler into the feed line is the（）.Abottom-blow valveBskin valveCfeed-check valveDfeed-stop valve
单选题If the electric motor driving an air compressor fails to start, the cause may be a （）.Aleaking unloaderBtripped circuit breakerCcontrol line leakDdefective pop valve
单选题The（） is a smaller valve fitted in the auxiliary steam supply line, and is usually of the non-return type.Amain stem stop valveBauxiliary steam stop valveCfeed check or control valveDblow down valve
单选题（） in what position the engine stops there will always be at least one of the cylinders with its starting air valve open to admit compressed air to start the engine.ABecauseBOwing toCForDNo matter
单选题The arrangement and shape of the cams on a diesel engine camshaft directly control which of the listed groups of operating conditions?（）Aspeed, torque, and horsepower productionBfiring order, valve timing, and valve liftCfuel consumption, efficiency, and cylinder pressureDscavenge pressure, compression ratio, and exhaust pressure
单选题A gradual decrease in the discharge pressure of an operating hydraulic pump can be caused by （）.Athe four-way control valve failing to shiftBthe bleeder valve sticking in the open positionCcold hydraulic fluidDa clogged air vent falter on the oil reservoir
单选题A loud clicking noise from the valve compartment of an operating diesel engine would indicate（）Aworn valve seatsBworn main bearingCexcessive valve clearanceDweak rocker arm springs
单选题The simplest method to use for determining if a centrifugal pump is operating as designed, is to （）.Aclosely observe the pump discharge temperatureBclose off the discharge valve, and watch for a rise in pressureCmomentarily close off the suction valve, and watch for a rise in pressureDuse a clamp on ammeter and compare the readings to past records
单选题An interlock in the remote operating valve line stops the valve （） when the engine turning gear is engaged.Ato openBopeningCopenDopened
单选题A pressure drop in the liquid line of a refrigeration system may cause（）Athe solenoid valve to seizeBthe compressor to huntCflash gas to form in the liquid lineDthe expansion valve to freeze open
单选题In slow speed two-stroke engines,（）the fresh air entering begins when and stops as（）Athe inlet port is opened by the up coming piston； the port is closed by the down goingBthe inlet valve is opened by the down going piston；the inlet valve is closedCthe inlet port is opened by the down going piston；the port is closed by the up comingDthe inlet valve is opened