更多"The diesel engine is a type of inte"的相关试题:
[单项选择]In a modern internal combustion diesel engine, the load carrying part of the engine is referred to as the（）
A. bedplate or base
B. sump or oil pan
C. cylinder block
D. frame
[单项选择]Theoretical perfect combustion in a diesel engine yields by-products of （）.
A. aldehydes and carbon dioxide
B. water vapor and carbon monoxide
C. nitrogen and carbon monoxide
D. water vapor and carbon dioxide
[单项选择]Poor combustion in a diesel engine can be caused by （）.
A. high compression pressure
B. low intake air temperature
C. low exhaust pressure
D. high scavenge air temperature
[单项选择]Incomplete combustion in a running diesel engine can cause piston rings to become stuck as a result of （）
A. residual carbon deposits
B. lube oil viscosity breakdown
C. uneven heat expansion of the rings
D. uneven heat expansion of the piston
[单项选择]Internal combustion engine crankcase vent outlets must be equipped with （）
A. hinged rain guards
B. corrosion resistant flame screens
C. dipsticks for measuring oil levels
D. crankcase ventilation fans
[单项选择]Combustion knock occurring in a diesel engine can be caused by （）
A. low coolant temperature
B. insufficient fuel
C. high ambient temperature
D. carbon buildup on the injector tips
[单项选择]Which statement about diesel engine combustion is true?（）
A. Combustion does not begin until the piston starts down on the power stroke
B. Maximum combustion pressure is reached before TDC
C. Turbulence in the cylinder causes a delay in ignition
D. Maximum cylinder firing pressure is not developed until the piston passes TDC
[单项选择]A diesel engine with a combustion chamber located between the crowns of two pistons is known as a/an （）.
A. double-acting engine
B. opposed pistons engine
C. single-acting engine
D. horizontal acting engine
[单项选择]In an internal combustion engine, which of the devices listed will force the compression rings to seal the compression gases in the space above the piston?（）
A. Used of bimetallic piston rings
B. Ring gap pre-tensioning
C. Thermal increase in ring-end clearance
D. Gas pressure acting against the back of the ring
[单项选择]The marine diesel engine is a type of diesel engine used on ships The （） of its operation is not very difficult to understand.
A. principle
B. principal
C. cause
D. case
[单项选择]Diesel engine blow-by is the leakage of combustion gases past the （）
A. oil rings only
B. compression and scraper rings
C. cylinder liner sealings
D. cylinder liner ring grooves
[单项选择]As for a diesel engine, lack of combustion air may be due to （）.
A. fouling turbine
B. fuel pump faults
C. lubrication failure
D. excessive cooling
[单项选择]Trunk type diesel engine pistons are effectively cooled when heat is（）
A. radiated through the engine block
B. transferred to water cooled cylinder walls
C. conducted through the piston crown
D. transferred to escaping exhaust gases
[单项选择]The diesel engine is a type of （）.
A. turbine engine
B. gas turbine
C. steam engine
D. internal combustion engine
[单项选择]Trunk-type diesel engine pistons are most effectively cooled by heat（）
A. conducted through the engine block
B. conducted to water cooled cylinder walls
C. conducted through the piston crown
D. loss to escaping exhaust gases
[单项选择]In a diesel engine, a positive displacement type blower is usually （）
A. gear drive by the engine
B. driven by an exhaust gas turbine
C. driven by a camshaft
D. driven by separate motor
[单项选择]
In a medium speed diesel engine, a trunk type piston may be cooled by（）
Ⅰ.oil circulation though passages in the piston crown
Ⅱ.heat transfer through piston rings and liner wall
A. Ⅰ only
B. Ⅱ only
C. either Ⅰ or Ⅱ
D. neither Ⅰ or Ⅱ
