网友您好， 请在下方输入框内输入要搜索的题目：
题目内容
（请给出正确答案）
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
参考答案
参考解析
解析：
暂无解析
更多 “单选题An interlock in the remote operating valve line stops the valve （） when the engine turning gear is engaged.A to openB openingC openD opened” 相关考题
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
考题
_______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
考题
Which of the following is a secure method of remote access via command line?()
A.RCPB.TelnetC.RSHD.SSH
考题
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
考题
Which of the following is a secure method of remote access via command line?（）A、RCPB、TelnetC、RSHD、SSH
考题
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？（）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
考题
单选题Which operation should be done when launching an inflatable liferaft by hand?（）A
Open the liferaft casingB
Turn the valve on the CO2 cylinder to start inflationC
Make sure the operating cord is secured to the vessel before throwing it over the sideD
After inflation，detach operating cord from liferaft
考题
单选题When operating the air supply system in a covered lifeboat the（）.A
fuel supply valve should be closedB
hatches，doors，and oar ports should be closedC
air cylinder shut-off valve should be closedD
engine should be shut off
考题
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？（）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
考题
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 （）.A
a pressure reducing valveB
a pilot valveC
an operating pistonD
downstream pressure
考题
单选题Which of the problems listed represents the major difficulty encountered with thermal expansion valve operation?（）A
Lube oil passing through the systemB
Moisture or foreign matter collecting at the valve seat and orificeC
Variable spring tension caused by the changing temperatureD
Frost on the liquid line
考题
单选题Many diesel engine exhaust valves are being constructed with hollow stems filled with sodium in order to （）A
provide added wear protection against today’s corrosive quality of fuelB
increase overall valve strength due to the high gas pressuresC
assist in dissipating heat due to the extreme operating temperaturesD
reduce the overall weight of the valve thus helping eliminate valve spring surge and hammering
考题
单选题Fire protection regulations for towing vessels require any fuel line subject to internal head pressure from fuel in the tank to（）.A
be fitted with a positive fuel shut-off valve located at the tankB
have a shut-off valve at the top of the tankC
have a gate valve easily accessible in the space where the tank is locatedD
have a drain cock at the lowest point in the fuel line
考题
单选题A pressure drop through the refrigerant liquid line may cause （）.A
solenoid valve to seizeB
compressor to huntC
formation of flash gas in the liquid lineD
expansion valve to freeze open
考题
单选题A warmer than normal compressor suction line might be caused by （）.A
insufficient lubricationB
insufficient refrigerantC
excess refrigerantD
excessive opening of the expansion valve
考题
单选题The （） returns the pump operating rod to mid position as soon as the helmsman stops turning the wheel.A
hunting gearB
cut-off levelC
servo-motorD
swivel block
考题
单选题Diesel engine air start valve timing is controlled by（）A
engine operating speedB
an air manifoldC
a hydraulic distributorD
individual cams and valve gear
考题
单选题The valve that prevents water from backing out of the boiler into the feed line is the（）.A
bottom-blow valveB
skin valveC
feed-check valveD
feed-stop valve
考题
单选题If the electric motor driving an air compressor fails to start, the cause may be a （）.A
leaking unloaderB
tripped circuit breakerC
control line leakD
defective pop valve
考题
单选题The（） is a smaller valve fitted in the auxiliary steam supply line, and is usually of the non-return type.A
main stem stop valveB
auxiliary steam stop valveC
feed check or control valveD
blow down valve
考题
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.A
BecauseB
Owing toC
ForD
No matter
考题
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?（）A
speed, torque, and horsepower productionB
firing order, valve timing, and valve liftC
fuel consumption, efficiency, and cylinder pressureD
scavenge pressure, compression ratio, and exhaust pressure
考题
单选题A gradual decrease in the discharge pressure of an operating hydraulic pump can be caused by （）.A
the four-way control valve failing to shiftB
the bleeder valve sticking in the open positionC
cold hydraulic fluidD
a clogged air vent falter on the oil reservoir
考题
单选题A loud clicking noise from the valve compartment of an operating diesel engine would indicate（）A
worn valve seatsB
worn main bearingC
excessive valve clearanceD
weak rocker arm springs
考题
单选题The simplest method to use for determining if a centrifugal pump is operating as designed, is to （）.A
closely observe the pump discharge temperatureB
close off the discharge valve, and watch for a rise in pressureC
momentarily close off the suction valve, and watch for a rise in pressureD
use a clamp on ammeter and compare the readings to past records
考题
单选题A pressure drop in the liquid line of a refrigeration system may cause（）A
the solenoid valve to seizeB
the compressor to huntC
flash gas to form in the liquid lineD
the expansion valve to freeze open
考题
单选题In slow speed two-stroke engines,（）the fresh air entering begins when and stops as（）A
the inlet port is opened by the up coming piston； the port is closed by the down goingB
the inlet valve is opened by the down going piston；the inlet valve is closedC
the inlet port is opened by the down going piston；the port is closed by the up comingD
the inlet valve is opened
热门标签
最新试卷