更多"If the engine does start on air, bu"的相关试题:
[单项选择]If the engine does start on air, but combustion does not immediately begin, the cause may not be ().
A. low compression
B. failure of the fuel pump to discharge fuel
C. incorrect timing of fuel pump
D. turning gear being still on
[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]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]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]If the engine does not start on air, it may be due to ()
A. low compression of the fuel pumps
B. incorrect timing of fuel pumps
C. the starting air valves stuck
D. air-locks in fuel oil pipeline
[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]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]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]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]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]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]The diesel engine is a type of internal combustion engine which ignites the fuel by injecting it into hot, high pressure air in a ().
A. air bottle
B. air compressor
C. crank case
D. combustion chamber
[单项选择]What does Peter do?()
A. He's good at fixing things.
B. He can speak good German.
C. He does the washingup after supper
D. He's a language teacher.
[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]How does combustion air enter the cylinder of a two-cycle diesel engine?()
A. Cylinder head valves
B. Ports
C. Turbo chargers
D. Bleeder valves
[单项选择]Vessels having main engines arranged for air starting are to be provided with at least ()
A. one automatic drain serving both containers
B. two air starting containers of approximately equal size
C. one control air container and one starting air container
D. one additional means of starting the main engine