F．uel droplets injected into a diesel engine cylinder must have adequate penetration to ____.

A．prolong the ignition delay period

B．ensure the beginning of fuel injection

C．thoroughly utilize the air charge

D．allow controlled fuel combustion

[单选题]When fuel is injected late into a diesel engine cylinder_______.A．the exhaust will be clearB．fuel consumption will be lowC．all the fuel will be burned at top dead centerD．fuel consumption will be high

[单选题]Proper atomization of fuel in diesel engine combustion chambers will （）.A . affect the injection pressureB . improve combustionC . reduce compression pressureD . decrease power output

In a diesel engine， fuel must be broken up into a spray of fine droplets to （）.A

[单选题]The amount of fuel injected in a particular time, or degree, of crankshaft rotation is termed （）.A . meteringB . timingC . rate of injectionD . rate of distributio

Just before _ fuel is injected into the cylinder by the fuel injector.A. TDCB. L

[单选题]Generally speaking，the fuel injected into a marine diesel engine combustion chamber is ignited by（）.A . spark plugsB . glow plugsC . heat of compressionD . a magneto

During ______ fuel is injected and burnt.A. the suction strokeB. the power strok

[单选题]On a diesel engine, fuel is delivered into the combustion space by （）.A . a cooling systemB . a lubrication oil systemC . an electric systemD . an injection system

[单选题]In an ordinary diesel engine the fuel injection begins （）A . after TDCB . before TDCC . after BDCD . before BDC

[单选题]If the diesel engine fuel injection timing is changed to delay the start of injection until the pistons are at top dead center, the engine will_________.A．backfire through the air intakesB．develop less power under loadC．have high firing pressuresD．li