Which of the listed cylinder liner surface conditions indicates proper lubrication?（）

相似题目

• Which of the listed effects represents the purpose of heat treating steel?（）

  A . Develop ductility B . Improve machining qualities C . Relieves stresses D . All of the above

  查看最佳答案

• In order to distribute the side pressures over a wide area of the cylinder walls and liners, which of the listed types of pistons are used in modem low pressure air compressors?（）

  A . Differential B . Trunk C . Barrel D . Valve-in-head

  查看最佳答案

• Which of the listed statements is correct concerning refrigeration systems?（）

  A . Dehydrators must be used continuously in a refrigeration system B . A 25 ton refrigeration system has the same cooling effect as melting 25 tons of ice in 24 hours C . A thermostatic expansion valve is used to control refrigerated space temperature D . The liquid receiver functions to collect and remove non- condensable gase

  查看最佳答案

• Which of the listed classes of fire would most likely occur in the engine room of a vessel?（）

  A . Classes A and B B . Classes B and C C . Classes C and D D . Classes A and D

  查看最佳答案

• The main factor which determines the output of each cylinder is （）

  A . the cylinder weight B . the cylinder bore C . the cylinder length D . the cylinder cover

  查看最佳答案

• Which of the following operation will have a direct impact on the rate of wear in a cylinder liner （）

  A . amount of scavenge air to the cylinder B . quality of fuel injected C . viscosity of the lube oil D . compression ratio of the pisto

  查看最佳答案

• Which of the listed refrigeration system components keeps the refrigerant circulating through the system?（）

  A . Expansion valve B . Condenser C . Evaporator D . Compressor

  查看最佳答案

• Which of the fuel injection systems listed uses a spring loaded differential spray needle valve and individual pump for each cylinder?（）

  A . Common-rail injection B . Air injection C . Jerk pump injection D . Distribution injectio

  查看最佳答案

• Which of the processes listed consumes the greatest amount of power while producing the greatest amount of heat?（）

  A . Overcoming sliding friction B . Overcoming rolling friction C . Overcoming fluid friction D . Overcoming oil wedge frictio

  查看最佳答案

• Because the timing of injection is crucial, （） mounted on the camshaft, which is driven by the crankshaft are used to operate the fuel pumps, one of which is provided for each cylinder.

  A . gears B . rams C . barrels D . cam

  查看最佳答案

• Which of the petroleum products listed has the lowest flash point?（）

  A . Hydraulic oil B . Lubricating oil C . Diesel oil D . Refrigeration oil

  查看最佳答案

• Which of the following are characteristics of named access lists?（）

  A . Individual statements in a named access list may be deleted. B . They require a numbered range from 1000 to 1099. C . When created, they must be specified as standard or extended. D . They are created with the ip access-list command. E . The entire access list must be deleted before editing. F . They are applied with the ip name-group command.

  查看最佳答案

• Which of the conditions listed would cause simultaneous high cylinder firing pressure and low exhaust temperature?（）

  A . Improper fuel rack positioning B . Lengthy opening of the exhaust valve C . Excessively early injection timing D . Extended light load operatio

  查看最佳答案

• Which of the listed statements is correct concerning the starting of centrifugal pumps?（）

  A . They should always be started with the discharge valve closed B . They should always be started with the discharge valve opened C . A priming pump is always required to flood the impeller suction D . They should always be started with the sealing line valves closed

  查看最佳答案

• In which of the listed hydraulic systems will the installation of an oil cooler be necessary?（）

  A . Constant tension mooring winch system B . Hatch cover system C . Watertight door system D . Internal combustion engine hydraulic starter system

  查看最佳答案

• Which of the listed bearing types is an example of a solid bearing?（）

  A . Piston wrist pin bushing B . turbine bearing C . Spring bearing D . Diesel engine main bearing

  查看最佳答案

• Cylinder linings constructed as an integral part of the block, are characterized by which of the following disadvantages?（）

  A . They conduct heat poorly B . They are expensive C . They cannot be replaced D . They require special tools for removal

  查看最佳答案

• Which of the following statements concerning cylinder liner wear is true?（）

  A . Liner wear is distributed equally between the upper and lower portions of the cylinder B . Excessive liner wear causes wear between piston ring and groove C . Excessive, but uniform liner wear will not cause wear between piston ring and groove D . Liner wear is normally greatest in the middle of the cylinder

  查看最佳答案

• In which of the listed refrigeration system components does superheating of the refrigerant take place?（）

  A . Expansion valve B . Evaporator C . Drier D . Receiver

  查看最佳答案

• Which of the listed diesel engine systems is likely to create the problem of a cylinder regularly misfiring?（）

  A . Lubrication B . Cooling C . Fuel D . Electric ignitio

  查看最佳答案

• Using the LIST command in Recovery Manager (RMAN), which two pieces of information in the RMANrepository can be listed?（）

  A . stored scripts in the recovery catalog B . backups that can be deleted from disk C . backup sets and image copies are obsolete D . backups that do not have the AVAILABLE status in the RMAN repository RMAN

  查看最佳答案

• Which of the following is the correct command to list the filesystems in datavg?（）

  A . lsvg -p datavg B . lsvg -l datavg C . lsvg -L datavg D . lsvg -o datavg

  查看最佳答案

• Which of the devices listed is common to all types of pumps?（）

  A . A power end and fluid end B . A propeller and educator C . A volute and impeller D . A turbine and pisto

  查看最佳答案

• Which of the following answer choices are correct characteristics of named access list?（）

  A . You can delete individual statements in a named access list B . Named access lists require a numbered range from 1000 to 1099. C . Named access lists must be specified as standard or extended. D . You can use the ip access-list command to create named access lists. E . You cannot delete individual statements in a named access list. F . You can use the ip name-group command to apply named access lists.

  查看最佳答案