更多"The two most common gases used in p"的相关试题:
[单项选择]The exhaust gases in a supercharged two-stroke/cycle diesel engine are expelled from the cylinder by （）
A. pumping action of the piston
B. pressure of the fuel charge
C. vacuum developed in the manifold
D. pressure of the fresh air charge
[单项选择]The exhaust system for a turbocharged two-stroke/cycle diesel engine functions to（）
A. discharge exhaust gases and smoke
B. furnish energy to the turbocharger
C. reduce engine room noise
D. all of the above
[单项选择]The knot used to join two lines or two large hawsers for towing is called a（）.
A. square knot
B. carrick bend
C. sheet bend
D. bowline
[单项选择]Hydraulic pumps most commonly used in steering systems are of the （）.
A. lobe type
B. screw type
C. axial piston type
D. volute type
[单项选择]Carbon dioxide flooding system is used for extinguishing fires because it reduces the concentration of oxygen in the air to（）.
A. flashing point
B. combustion point
C. auto-ignition point
D. lower explosive limit
[单项选择]The star formation is most commonly used and requires（） on the alternator.
A. one slip-ring
B. two sliprings
C. three sliprings
D. four sliprings
[单项选择]What type of electric motor is most commonly used on board ship?（）
A. non-synchronous electric motor
B. synchronous electric motor
C. fully enclosed electric motor
D. watertight electric motor
[单项选择]A separate piston cooling system is used to limit any contamination （） piston cooling glands（） the piston cooling system only.
A. between；to
B. either；or
C. from；to
D. neither；nor
[单项选择]Bourdon Tube is probably the most commonly used （） measuring instrument.
A. the absolute pressure
B. the gauge pressure
C. the vacuum pressure
D. the differential pressure
[单项选择]The type of gauge most commonly used to measure pressure is the （）.
A. bimetallic type
B. diaphragm type
C. bourdon tube type
D. resistance-temperature type
[单项选择]The Consol navigation system，used in Russian and Northern European waters，can be used（）.
A. for precise navigation in coastal waters
B. by measuring the phase difference of the dots and dashes
C. as an aid to ocean navigation
D. if the vessel is fitted with a special Consol receiver
[单项选择]A purge recovery system is used in a centrifugal air conditioning or refrigeration system to （）
A. purge lube oil from the liquid refrigerant
B. recover water purged from the system
C. separate foul gases from the receiver
D. purge non-condensable gases without losing refrigerant
[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]In a central cooling system, used in some modem ships, sea water is supplied to cool （）which will circulate to other individual cooler, greatly reducing the corrosion problems.
A. fresh water
B. sea water
C. cooling oil
D. emulsion
[单项选择]A permanent chain chasing system is used to（）.
A. clean anchor chain as it's hauled in
B. recover anchors which have lost their buoys
C. run and retrieve anchors
D. prepare anchor chain for inspection
[单项选择]A separate piston cooling system is used （） any contamination from piston cooling glands to the piston cooling system only.
A. to help
B. to limit
C. to protect
D. to remove
[单项选择]The most common instrument used to measure diesel engine exhaust pressure is the （）
A. pyrometer
B. bourdon gauge
C. pneumercator
D. manometer
