更多"The （） engine is used for alternato"的相关试题:
[单项选择]The （） engine is used for alternators and sometimes for main propulsion with a gearbox to provide a propeller of between 90 to 120 rpm.
A. four-stroke
B. two-stroke
C. slow speed
D. reversible
[单项选择]With the crank in position in the engine, some measurements can be taken by a special bridge gauge and （）.
A. a micrometer
B. a bowl
C. a feeler gauge
D. a wrench
[单项选择]Connecting rods in a diesel engine are used to connect the （）.
A. engine to the bed
B. rocker arm to the camshaft
C. crankshaft to the gear train
D. piston to the crankshaft
[单项选择]（） the engines, the diesel engine is（） used engine on board.
A. Between；more commonly
B. Among；the most commonly
C. Between；not more commonly
D. Among；not the most commonly
[单项选择]If the action of the engine indicates that some of the cylinders are not firing, the ones affected may be determined by watching （）.
A. the bad smoke
B. the smoky exhaust
C. the exhaust temperature
D. the peak pressure
[单项选择]The four-stroke engine is used for （） and sometimes for main propulsion with a gearbox to provide a propeller speed of between 90 to 120 rev/min.
A. alternator
B. turbo-charger
C. remote controller
D. windlass
[单项选择]Valve cages are used on some large diesel engines to （）
A. reduce wear on the valve stem
B. permit the use of alloy valve seat materials
C. reduce heat transfer from the valve seat
D. facilitate valve removal for servicing
[单项选择]Anchor（） are used in some installations where the cable lifter rotates about a vertical axis.
A. windlasses
B. drums
C. capstans
D. warp ends
[单项选择]Diesel engine exhaust temperatures may be used to indicate （）.
A. leaking exhaust valves
B. an overloaded cylinder
C. a clogged injector nozzle
D. all of the above
[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]Anchor capstans are used in some installation where the cable lifter rotates about a （）.
A. horizontal axis
B. crankshaft
C. vertical axis
D. camshaft
[单项选择]Diesel engine cylinder head test cocks are used to（）
A. check cylinder lubrication prior to starting engine
B. connect exhaust gas analyzers to determine engine efficiency
C. pressure test cylinder heads to check for leaks
D. remove moisture accumulations from cylinder prior to starting
[单项选择]The device used to limit engine torque at various engine speeds is called a （）
A. speed limiting governor
B. variable speed governor
C. constant speed governor
D. load limiting governor
[单项选择]A viscosity regulator used for an engine is usually provided in order to （） for an engine burning heavy fuel oil.
A. regulate the fuel supply
B. maintain a constant fuel viscosity at the fuel valves
C. maintain efficient cooling
D. alter the fuel density
[单项选择]Piston compression rings used in a diesel engine function to （）
A. transfer heat from the cylinder to the piston
B. scrape oil from the sides of the piston
C. seal the combustion space from the crankcases
D. prevent any piston contact with the cylinder liner
[单项选择]（）are increasingly used as main engine on merchant vessels, because they have a high Hp/Weight ratio.
A. Slow speed diesel engines
B. Medium-speed diesel engines
C. Steam engines
D. Gasoline engines
[单项选择]A magnetic strainer is used in the diesel engine reduction gear oil system to remove small particles of（）.
A. water
B. babbitt
C. iron or steel
D. acids
[单项选择]Lubricating oil used in a diesel engine serves to（）
A. reduce the wear of bearing surfaces
B. cool the bearing surfaces
C. assist in sealing bearing surfaces
D. all of the above
