The engine may lose power or slow down during running, when this occurs, the first cause possible may be hot bearings and （） of the pistons in the cylinders.

[单选题]A． ______ infected computer may lose its data.A．fileB．data baseC．virusD．ProgramA．B．C．D．

[单选题] A （75） infected computer may lose its data.（75）A． fileB． data baseC． virusD． program

[单选题]The indicated power of an engine can be obtained by taking the （）.A . precautionsB . rpmC . indicator cardsD . B and C

[单选题]infected computer may lose its data.A．fileB．data baseC．virusD．program

[单选题]A．(75) infected computer may lose its data．A．fileB．databaseC．VirusD．program

[单选题]A． (75) infected computer may lose its data.A．fileB．data baseC．virusD．program

[单选题]E．ngine operating conditions may be indicated by the color of the exhaust smoke Black smoke could indicate .A．an insufficient speed droop settingB．an overloaded engineC．clogged drain holes in the oil control ringsD．complete combustion

[单选题]A diesel engine may be hard to start if the （）A . air intake is restrictedB . engine is cranked too fastC . vibration dampener is faultyD . exhaust back pressure is low

[单选题]Diesel engine exhaust temperatures may be used to indicate （）.A . leaking exhaust valvesB . an overloaded cylinderC . a clogged injector nozzleD . all of the above

[单选题]Low compression of diesel engine may result from （）A . a worn cylinderB . broken piston ringsC . any of A and BD . none of the above