更多"If an emergency pump control is use"的相关试题:
[单项选择]If an emergency pump control is used as the emergency shutdown on a tanker，it must（）.
A. stop the flow of oil at the main deck manifold
B. prevent the oil from leaving the shore facility
C. prevent the oil from siphoning through the pump
D. None of the above
[单项选择]The （）pump is usually used as the emergency bilge pump.
A. turbine
B. screw
C. vane
D. ejector
[单项选择]The pump used to send the bilge water into the oily water separator（）the mixture because this might create finer oil particles.
A. should agitate
B. should not agitate
C. should mix up
D. should not add up
[单项选择]The lube oil pump used in a diesel engine is a （）.
A. volute pump
B. centrifugal pump
C. diaphragm pump
D. gear pump
[单项选择]The （）pump is usually used as the bilge feed pump to an oily water separator.
A. turbine
B. screw
C. vane
D. ejector
[单项选择]An axial piston, variable stroke pump is used in a vessels hydraulic steering gearUnder pressure, oil continually leaks out from between the valve plate/cylinder barrel and will（）.
A. cause loss of hydraulic oil from the system
B. result in extreme damage to the pump
C. cause damage to the pump ff not continually drained from the pump casing
D. result in the system high side pressure to substantially drop off
[单项选择]To function properly, oil control rings used on a diesel engine piston must distribute sufficient oil to all parts of the cylinder wall and must also（）.
A. prevent any lubricant from reaching
B. prevent excessive lubrication from reaching the combustion space
C. Provide metal-to-metal contact to seal the cylinder against blow-by
D. assure a positive means of scraping carbon accumulation from the cylinder
[单项选择]The meat box temperature control circuit, as used in ship service refrigeration system, is an example of （）
A. two position control
B. signal speed floating control
C. proportional control
D. reset control
[单项选择]Oil control rings used in two-stroke/cycle diesel engines are located near the bottom of the piston skirt in order to （）
A. increase the liner area covered by the oil film
B. maintain an oil film on the lower liner where scuffing is prevalent
C. keep excess oil away from intake and exhaust ports
D. help cushion piston skirt side thrust by providing a hydrodynamic oil wedge
[单项选择]The （）pump is usually used as the lubricating oil pump.
A. turbine
B. screw
C. vaneejector
D. centrifugal
[单项选择]The domestic fresh water pump starters are controlled by pressure switches which operate when the pressure in the tank varies within predetermined limits as water is drawn offThe word “which” means （）.
A. starters
B. pressure switches
C. pressure
D. water
[单项选择]The control rod of a steering gear pump is attached at its outer end to （）.
A. the hunting gear
B. the rudder stock
C. the rudder controller
D. the feedback unit
[单项选择]On a ship，a fire pump may be used for other purposes if（）.
A. the other services are run off a reducing station with a pressure gage
B. a separate fire pump is available for use on the fire main
C. all other services are operated by a manifold near the pump
D. All of the above
[单项选择]A fire pump may be used for other purposes if（）.
A. the other services are run off a reducing station with a pressure gage
B. one of the required pumps is kept available for use on the fire main system at all times
C. no relief valves are installed
D. all of the above conditions are met
[单项选择]Movement of the pump control rack in a fuel injection system using individual plunger-type pumps （）
A. changes the position of the fuel inlet ports
B. changes the length of the pump stroke
C. varies the quantity of fuel delivered
D. varies the compression of the delivery valve spring
[单项选择]Hydraulic control check value is generally used to （） in the marine hydraulic mechanism.
A. control the back pressure of return oil
B. lock the oil lines under some conditions
C. change the direction of oil flow
D. act as relief valve
[单项选择]The radar control used to reduce sea return at close ranges is the（）.
A. gain control
B. sensitivity time control
C. fast time constant
D. pulse length control
[单项选择]In a radial piston pump, reversal and control of fluid flow are accomplished by moving the （）.
A. central valve
B. radial plunger
C. floating ring
D. cylinder body
