C、 the grip of the tire on the road. D、 whether or not a brake servo is fitted.
28、Excessive wear in the middle of a tire tread could indicate: ( B ) A、 excess negative camber B、 wheels not running parallel. C、 over-inflation. D、 under-inflation.
31、Increasing the diameter of a single-plate clutch increases the maximum:( D )
A、engine speed before clutch slip. B、power the clutch can transmit. C、centrifugal force the clutch can withstand. D、 torque the clutch can transmit.
32、主要用于联结的螺纹是( A )
A.普通螺纹 B.矩形螺纹 C.梯形螺纹 D.锯齿形螺纹 33、径向轴承的作用是(C )
A.用来传递转矩 B.用来承受轴向载荷C.用来承受径向载荷 D.用作运动部件的导向
34、平带传动需要张紧轮张紧时,张紧轮应放于( B ) A.紧边内侧 B.紧边外侧 C.松边内侧 D.松边外侧 35、45号钢的含碳量为( B ) A.0.045% B.0.45% C.4.5% D.45%
36、用卡规或塞规检验孔或轴时,其测量时应为( A ) A.给卡规或塞规加适当的力 B.可强行卡入或塞入 C.靠卡规或塞规的自重 D.必要时用木锤敲入
5

