单项选择题
A.laying a straight edge across the crank webs at the crankpin and measuring the distance to the crankpin in two places
B.measuring the crank drop on either side of each crank throw while the crankshaft is slowly rotated through one revolution
C.rotating the crankshaft through one revolution, pausing each 90oof rotation to measure bearing clearances, top and bottom
D.taking micrometer reading between the crank cheeks opposite the crankpin every 90°of crank angle rotation
单项选择题 Heat for igniting the fuel oil in the cylinder of a diesel engine is generated by the （）
单项选择题 Diesel engine crankshaft deflection readings are generally taken at four crank positionsGood engineering practice requires the deflection gage or indicator to be（）
单项选择题 Fuel oil injected into the cylinder of a diesel engine just after the piston passes top dead center, will（）