If clearance between a piston and the cylinder wall is excessive, piston slap will occurThe slap itself is caused by （）
1、If the back clearance of a piston ring
If the back clearance of a piston ring is excessive,（）Acompression pressure in the cylinder will be higherBcarbon will accumulate behind the ringCcombustion gases will penetrate beneath the ring landDpiston side thrust will be increased
2、The cylinder and piston must be warmed
The cylinder and piston must be warmed up （） to a temperature of about 140 degF in standing by engine.ArepeatedlyBquicklyCgraduallyDimmediately
3、If the length of a wire is halved and
If the length of a wire is halved and the cross-sectional area is doubled, the resistance will be （）AquarteredBunchangedCdoubledDquadrupled
4、The difference between a class A and a
The difference between a class A and a class B EPIRB is that the class A EPIRB（）.Aoperates on both military and civilian aircraft distress ...
5、Reducing the clearance between a valve
Reducing the clearance between a valve stem and rocker arm will result in the valve （）Ahaving a shorter duration of openingBhaving a longer duration of openingCclosing soonerDopening later
6、Cold clearances between the skirt of a
Cold clearances between the skirt of an aluminum piston and the cylinder liner is about （）Atwice as large as with a cast iron pistonBthe sa...